CN1403684A - High-pressure sealed test method for filling and gas-producing profile - Google Patents
High-pressure sealed test method for filling and gas-producing profile Download PDFInfo
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Abstract
The present invention relates to dynamic monitoring technology for oil field exploration and prospecting. The high pressure sealed test method adopts one high pressure grease filling sealed well plant. During test and when the temperature is below zero and the gas produced contains some water, sealing grease is added, the ballast for well instrument is calculated, PVT method and fluid density method are adopted in explanation, and pressure trial and evacuation are completed. The said method is suitable for use in the case of well pressure not higher than 70 MPa and gas yield below 500 kilostereo each day to log natural gamma ray, magnetic position, temperature, pressure, etc. Corresponding explanation software is developed.
Description
Technical field: the present invention relates to oil field prospecting, exploitation class dynamic monitoring application technology, specifically, is a kind of high-pressure sealed test method for filling and gas-producing profile.
Background technology: the exploitation of this technology still belongs to exploratory stage, the following problem of ubiquity at present with application: when 1. well head was greater than 15 MPas, there was the situation of blowout prevention difficulty in common Blowout prevention wellhead when gas well is logged well.2. annotate, gas production is during greater than 50,000 sides, the downhole instrument difficulty of going into the well, the flow meter turbine is often blown to fly, knock fly, the sand card.3. data collection mode science is not just simply continued to use flowing well liquid producing profile log curve acquisition mode.4. well-log information quantitative interpretation coincidence rate is low.5. in the construction great dangerous accidents such as gas leakage, blast appear easily.
Goal of the invention: the object of the present invention is to provide a kind of enhancing sealing effectiveness, can accurately calculate down-hole instrument counterweight, can make full use of the driving well logging of fixed point time, the degree of depth drives well logging, closing well thermometric degree pressure recovers, aerogenesis temperature, pressure flex point are annotated in the well head monitoring, and 4 kinds of cable speeds of different directions (20 feet per minute clocks, 40 feet per minute clocks, 60 feet per minute clocks, 80 feet per minute clocks) are logged well up and down, are beneficial to well-log information is carried out a kind of high-pressure sealed test method for filling and gas-producing profile of integrated interpretation
Summary of the invention: concrete solution:
1. adopt high-pressure grease pouring sealing wellhead assembly, moisture during test as if running in subzero cold snap and the aerogenesis, at this moment can consider to add the stop-leak compound additive.
2. with calculating down-hole instrument counterweight weight following man-hour:
G＝P·πГ
2×10
6/g×120％
P is a well head pressure, and unit is a MPa, and Г is the choke tube radius, and unit is a rice, and π is a math constant, and g is the physics constant, gets 9.8 Newton/meter
2
3. adopt PVT method and the close method comparative interpretation of stream.
4. carry out pressure testing, emptying.
Effect of the present invention: it can satisfy annotate, the gas-producing well well head pressure is not more than 70 MPas, producing gas injection rate is not more than under the situations of 500,000 side/days and carries out dynamic monitoring, admission stratum natural gamma, magnetic orientation, temperature, pressure, specific retention, fluid density, flow curve, and developed corresponding notes, gas-producing well interpretation of logging data software, made well-log information quantitative interpretation coincidence rate improve greatly.
The high pressure sealing wellhead assembly is by generator, the blowout prevention box, lubricator, dropping against device, preventer, oil hand pump and greasing earial drainage pipeline are formed, each operation of components difficulty is big, the construction technology complexity, adopt some survey and continuous measurement to combine, drive a well and the closing well metering system combine, when continuous measurement, adopt 4 kinds of 2 kinds of different direction findings (20 feet per minute clocks that test the speed, 40 feet per minute clocks, 60 feet per minute clocks, 80 feet per minute clocks) measure to proofread and correct the systematic error of turbine flowmeter, facts have proved that this data collection mode can reflect the stratum, the character of production fluid, can strengthen the dynamics of integrated interpretation, effectively reduce measure error, satisfy the well logging demand; Production logging three-phase stream explains it is a nationwide difficult problem, the high-pressure gas well well log interpretation is a new problem especially, compare with normal production fluid, being difficult in the gas volume compression ratio is difficult to determine, degassing temperature and pressure are difficult to determine, add explanation again without ready patterns to follow, this has just increased the difficulty that gas well is explained greatly.
This technology has solved mesohigh of the same trade and has annotated gas-producing well test difficult sealing, the downhole instrument difficulty of going into the well, construction technology and data collection be science not, a series of difficult problems such as the interpretation of logging data coincidence rate is low, thereby, the technical level of notes, gas-producing well dynamic monitoring is brought up to a new step on the whole, and stepped into domestic advanced level of the same trade.
This project is applicable to the high-pressure sealed dynamic monitoring of oil field notes gas-producing well, can guarantee to be not more than for 500,000 side/days in the notes gas production, well head pressure is not more than safe construction under the situation of 70Mpa, and this cover well head obturator and construction operation technology are equally applicable to the monitoring to water injection well in oil fields and flowing well gas-lift well.
At present, use this technology tell breathe out that the oil field is annotated, five mouthfuls of gas-producing profile well loggings, well logging one-time success rate 100%, the excellent rate 95% of data, well logging quantitative interpretation coincidence rate 91%; Facts have proved this technology energy scientific evaluation notes aerogenesis effect, effectively discern payzone character, accurately calculate permeability, effectively guaranteed the oilfield stable production volume increase, improved the oil recovery factor in oil field greatly.
On the basis perfect to technical scheme, system has carried out withstand voltage, sealing experiment to the greasing blowout prevention.In 99 years, mound Dong7Jing, two mouthfuls of gas-producing wells of warm western 8-24 well have been finished smoothly, the high pressure filling and gas-producing profile well logging of north, Portugal 5-2, two mouthfuls of gas injection wells of Portugal's north 2-4 well, wherein north, Portugal 2-4 borehole logging tool two wells.Finish 4 mouthfuls high pressure injection gas-producing well logging tasks April calendar year 2001 in the Tarim Basin.Well logging one-time success rate 100%, log qualification rate 100%, the excellent rate 95% of well-log information, well logging quantitative interpretation coincidence rate 91%.Well-log information and interpretation results obtain relevant expert's abundant affirmation.Oilfield Company is according to explanation results, and these 8 mouthfuls of wells have been taked under the responding well to have received good effect behind the technology improvement method.This technology has overcome domestic a great problem in production logging, and to ensureing the oil field reasonable development, great effect has all been played in stable yields, volume increase.The enforcement of this technology has produced good economic benefits and huge social benefit with application.
Description of drawings:
Accompanying drawing 1 is a high-pressure grease pouring Blowout prevention wellhead sketch
Accompanying drawing 2 is pneumatic notes plug pump and oil hand pump workflow block diagram
Accompanying drawing 3 is greasing system pressure distribution map
Accompanying drawing 4 is handled basic procedure (flowing close method and PVT method) for well-log information
Fig. 5 is the close interpretative method explained flowchart of stream
Specific embodiments:
Construction technology well head greasing blowout hookup mainly comprises two parts, i.e. blowout prevention box part and choke tube part, and its sealing function is finished by this part.
Well head blowout prevention principle
As shown in Figure 1: 1-" O " RunddichtringO; 2-blowout prevention box sealing pipeline; The 3-oil hand pump; The 4-recovered oil is disclosed; The 5-reflux pipeline; 6-" O " RunddichtringO; 7-imports compressed air; 8-greasing pump; The 9-cleaner; The 10-pressure regulator; The 11-lubricator cup; 12-greasing pipeline; 13-" O " RunddichtringO; 14-stop-leak compound bucket; The 15-logging cable; 16-compresses plunger; 17-blowout prevention box; 18-compresses Glan; The 19-pull-off spring; 20-rubber packing; The last choke tube of 21-; 22-greasing seal section; Choke tube under the 23-; 24-connects the blowout prevention union; 25-blowout prevention box part; 26-choke tube part
Under the driving effect of oil hand pump, pump into the hydraulic oil of pipeline, promote piston and move down, thereby compress the rubber packing, make it produce deformation, expansion, compress packing, thereby the locking cable stops oil and gas leakage, tightness can be controlled by handlance; Sometimes well head oil gas also can flow out along slit, the cable outside, and then blowout prevention box packing and compress Glan and play the sealing well head makes the effect in the unlikely defence line, second road that spills of oil gas.After discharging the pressure of handlance, plunger moves up under spring, unclamps packing, and then packing only plays the effect of frizing.
The effect of choke tube is to be used for the most well head pressure of balance.Choke tube is a kind of steel pipe of inner wall smooth, and its internal diameter and the outside diameter of cable differ has only 0.15-0.20mm.When clamp-oning into, form very big pressure reduction from the gap of stop-leak compound along between cable and obstruction stream pipe that the greasing pipeline injects.Its pressure distribution situation See Figure two:
Greasing pump discharge pressure P1, pressure is P2 after the pipeline step-down enters choke tube, the grease that flows downward flows to choke tube exit surplus pressure P, with the well head pressure balance or greater than well head pressure, thereby stops well head oil gas to leak.
The below of well head greasing sealing device is connected with lubricator, and connected mode is for using the union of band sealing ring.
The working pressure range of lubricator, greasing pump, greasing pipeline, dropping against device, blowout preventer has following several:
34.5Mpa?????????????????????5000Psi
69Mpa??????????????????????10000Psi
103.5Mpa???????????????????15000Psi
138Mpa?????????????????????20000Psi
In the same withstand voltage scope, lubricator, dropping against device, blowout preventer can be divided into anti-sulphur and two kinds of different specifications of anti-sulphur not again, and specifically selecting for use can sulfur-bearing and well head pressure be just determined according to output.
Single-core cable diameter commonly used in test is 4.763mm, 5.556mm, and 6.35mm is modal to be 5.556mm.
At cables with different diameters, wellhead sealing device also has corresponding nominal diameter.Comprise parts such as blowout prevention box, blowout prevention box packing, Glan and choke tube, all should be corresponding with employed cable on the response size.
Main seal member characteristic and select as follows:
A. air piston pump (also being Lincoln's pump or greasing pump)
The main effect of air piston pump is: pump into stop-leak compound sealed well mouth pressure in the Xiang Liuguan, operating air pressure 0.7 0.8Mpa, output MTP 105MPa (15000psi); Greasing pump pressure 〉=70MPa (10000psi).
B. oil hand pump
The main effect of oil hand pump is: after instrument is lowered to pit shaft, with handlance half envelope of the polytetrafluoroethylene (PTFE) rubber in the packing box of top is compressed, make it produce deformation and expansion, to reach the purpose of hermetically-sealed cable and stream pipe.
C. double ram type preventer
The main effect of double ram type preventer is: when relying on stream seal of tube well head pressure out of control, can turn-off double ram type preventer; Single disc can seal 34.47Mpa (5000psi) pressure, and double disc can seal 68.95Mpa (10000psi) pressure; Preventer can adopt handlance hydraulic-driven and handwheel to drive two kinds of methods, and the oil pressure that hydraulic-driven or handwheel drive is 1: 10 with the ratio of the suffered oil pressure of corresponding preventer slipper piston.Should adopt handlance to pump into stop-leak compound between two pairs of slipper piston flashboards, oil pressure should be higher than well head pressure 0.67-2Mpa, and double ram type preventer is installed on the bottom of lubricator, the top of production tree.
D. lubricator
The operating pressure of lubricator is 68.95MPa (10000psi), it mainly acts on: when carrying out the examination of oil gas well surveying, make and go into the well testing tool before the well head gate is not opened, be placed in the lubricator in advance, thereby avoid under open flow and band pressure situation dismounting cable and testing tool.The lubricator top links to each other with the blowout prevention box, forms confined space.
E. lubricator is selected
Length, external diameter, well head pressure, the borehole fluid of going into the well according to testing tool or instrument string (have or not H
2S) determine the specification and the length of lubricator, the length of general lubricator is slightly larger than or equals the length of well tool down or instrument string.
F. the selection of preventer
Oil well selects for use single ram type perventer to get final product usually.
Gas well: no H
2Select double ram type preventer during S for use; H is arranged
2An appropriate to the occasion double ram type preventer and the single ram type perventer selected for use of S; Moisture in the gas well (or hydrate) should consider whether add additives such as methyl alcohol or ethylene glycol.
G. flow the selection of pipe
Should select for use summer 5.63mm (the stream pipe of 0.222 ") internal diameter, should select for use winter 5.74mm (the stream pipe of 0.226 ") internal diameter, in gas well test, but the method that sealed well mouth pressure according to the form below is recommended is selected stream pipe radical for use:
| Well head pressure MPa (Psi) | Select to use stream pipe radical |
| ????0～17.24(0～2500) | 2 |
| ????17.24～27.58(2500～4000) | 3 |
| ????27.58～41.37(4000～6000) | 4 |
| ????41.37～68.95(6000～10000) | 5 or more |
Annotate: every stream length of tube is 54mm, and oil well test selects for use the 2-3 root to get final product.
H. flow selecting for use of seal of tube fat
The well head stop-leak compound should keep clean, free from admixture, nothing precipitation (particle), when operating ambient temperature when 38-18 degree (Celsius), stop-leak compound kinematic viscosity is between 3.8 * 103-4 * 106 centipoises; And low price.● the well-log information collection
The filling and gas-producing profile test, select the EXCELL-1000 numerical control production logging system of U.S. Halliburton (HALLIBURTON) well logging company for use, downhole instrument connects seven parameter production loggings combination instrument, comprising downhole instruments such as remote measurement pipe nipple, Gamma device, magnetic orientation, pressure, temperature, specific retention, fluid density, flow meters, the Multi-parameter Combined Tool well logging can measure the physical characteristic of different depth stratum, fluid simultaneously, be convenient to integrated interpretation, reduce the error that one-parameter is explained, and then improved the precision of explaining on the whole.
Placed in the middle in pit shaft in order to guarantee downhole instrument, connect centralizer in the instrument upper and lower, eliminated and reduced different fluidised forms, flow velocity is to holding the influence of one after another, fluid density, traffic sampling precision, consider of the influence of the gamma rays of the close generation of stream to Gamma device, by the way that two are increased the weight of to be connected between them, be used for increasing spacing, effectively reduce stack and disturb.
Consider that simultaneously notes aerogenesis pressure is excessive, originally the down-hole instrument is difficult for going into the well, and selects for use weighted lever to be connected with instrument, and its weight can be calculated by the formula of back and determine.Because EXCELL-1000 type numerical control logging system is the comparatively ripe production logging system of a cover, at the beginning of introducing, just to the test index of downhole instrument in oil-water well and three property (stability of down-hole instrument, uniformity, repeatability) carried out evaluation, this makes up 190 ℃ of instrument heatproofs, withstand voltage 103MPa, and downhole temperature is 88 ℃, and maximum pressure is 37MPa, and all the end surpasses its scope.By the technical device index is analyzed, its certainty of measurement also can satisfy the technical requirements of well logging, thereby becomes first-selected instrument.
(1). go into the well from instrument, drive (50ft/min) with the time earlier, collect, from opening the well head test strobe, emptying blowout prevention inner air tube, the data when measuring pressure balance; Drive the optical viewer duty more than lasting half an hour with the time again, in order to check blowout prevention effect.Then, drive (50ft/min) by surveying in the lubricator with the degree of depth again, collect surface temperature and temperature data the influence degree of downhole conditions to pressure, temperature flex point place.
(2). at interval of interest, respectively with the cable of upper and lower 20ft/min, 40ft/min 60ft/min, the 80ft/min seven parameter data that measure that test the speed.Operation, multiple testing the speed help determining the turbine flowmeter threshold value up and down, reduce the linearity error of instrument speed response, improve the precision of handing over draw (flow-test the speed).For testing the speed, the operator can be according to gas injection rate, secondary speed, regulate voluntarily, make up and down not in the same way and identical testing the speed when measuring, secondary speed has positive negative value as far as possible, and the sampling interval is 2 point/inches, the curve ranges setting is being standard intuitively, conveniently, stable, the curve smoothing of guaranteeing to test the speed is not taking place will to measure ponding section (slough) under the abnormal conditions (be hampered, block).
(3). all require point to survey on slough, each interval of interest top, the horn mouth everywhere, admission one-point measurement seven parameter values (the time actuating speed≤50ft/min).
(4). static temperature, the pressure of admission closing well after 1.0 hours and 1.5 hours recovers data, so that understand formation properties, provides reference to qualitative interpretation.
(5). require to convert the GDF formatted file to the ASCII character formal file, and playback curve, deposit, copy.
● the reduction measure of risk
At inflammable, explosive, the easy leakage of gases at high pressure, in case the uppity characteristics that have an accident, prevention is topmost measure, and risk is cut down and mainly done from following several respects:
1. reply high-pressure grease pouring sealing system is checked comprehensively before the test, tackles it in case of necessity and carries out the pressure testing experiment.Pipeline must not be damaged, the junction is firm, sealing ring, sealing mat do not have burn into and do not have distortion, elasticity is good, conversion adpting flange internal diameter, screw thread are suitable, withstand voltage up to standard, and stop-leak compound cleaning, viscosity are moderate, rotten, air compressor machine is working properly, the handlance stable performance, the greasing pump is strong and powerful, and control valve is effective;
When 2. pressure is higher, can increase choke tube radical in the blowout prevention box.Moisturely in the gas consider to add methyl alcohol or ethylene glycol, H is arranged
2The appropriate to the occasion double ram type preventer of selecting for use of S gas.To in time replenish stop-leak compound and hydraulic oil and generator gasoline;
3. switch testing, pressure release gate speed should be avoided because interior external pressure difference causes blast slowly.An evacuation procedure must be arranged when especially opening test strobe.Greasing pressure should be higher than well head pressure 1-3Mpa;
4. at well head, horn mouth, place, shaft bottom, the cable speed of removing must be slow.To under the monitoring of instrument, carry out during pressure release;
5. No Open Flames for wellsite applications, forbid collision, knock, should stand in the gate side during switch testing gate, the people must not stand in positive 20 meters of the gate.The starting gate action is wanted slowly mustn't open fast, forbids to operate against regulations.Well logging vehicle, greasing pump, generator should be parked in public attention as far as possible during construction;
When 6. constructing, forbid opening mobile phone and beeper in the scope of well site;
7. go up well wear the labour protection protector must can antistatic, enter that Safety helmets must be worn in the fire wall.
8. radioactive source deposits, escorts, uses and must carry out by pertinent regulations;
9. forbid during logging operation to cross over, pass through cable, forbid the people that stands under the boom.● the safe construction specific requirement is as follows:
(1) should possess necessary fire fighting equipment during this wellsite applications;
(2) go up the well personnel and must dress the labour protection protector;
(3) winch is parked steadily, over against well head, and apart from well head greater than 25m, when wind is arranged, be parked in public attention, tire will prop up covers wood;
(4) drumman hangs up power, following payout, and the operator is making generator, starts panel, computer, enters logging system;
(5) the well head worker is with preventer, and dropping against device firmly is installed on the production tree, and with generator, the greasing pump, air compressor machine, stream guiding tube, blowout prevention box, lubricator connect successively, fix lower sheave then, hang up properly top sheave, connect tension lines;
(6) operator is to down-hole instrument power inspection, scale, verification;
(7) the well head worker closely is connected lubricator with dropping against device;
(8) well head collides mutually by rigid article such as avoiding metal in the process of assembling;
When (9) opening the production tree gate, guarantee that dropping against device, preventer are opened, producing oil tree gate wants slow, treat that the operator monitors lubricator internal pressure balance after, drumman can descend payout;
(10) in following payout process, drumman should be observed tension variation at any time, and the operator also will be careful tension force, and magnetic locating signal is so that in time find to be hampered situation;
(11) when wellsite operation, absolute prohibition pyrotechnics occurs in well head 30m scope, during the switch gate, with the operation unrelated person must be away from well head;
(12) the well head worker should check the working condition of high-pressure grease pouring wellhead assembly at any time in strict accordance with the operational procedure operation;
(13) after well logging finished, the manhole port strobe made return to normal production state and do the well site health well of well head;
(14) hand over, connect well by pertinent regulations before and after the well logging, work flow is carried out in strict accordance with working design.
● particular job program of project and task instruction summary
Particular job program of gas well test mainly contains the pressure testing experiment of high-pressure grease pouring sealing system, the emptying operation before instrument is gone into the well, the dismounting of high-pressure grease pouring Blowout prevention wellhead, the calculating of down-hole instrument counterweight, the installation of turbine flowmeter etc.Whether above working programme operation correctly relates to the safety and the well logging success rate of well logging construction.Its concrete job step is as follows:
The pressure testing experiment task instruction summary of high-pressure grease pouring sealing system:
1. meeting the precondition of making high-pressure grease pouring sealing system pressure testing experiment well is: each gate favorable sealing property, safe and effective of this well, and whole production tree is working properly, does not have to leak; High-pressure grease pouring sealing system crossover sub is bitten with coupling part on the production tree and is closed closely, is connected firmly; Production tree put the empty gate of pressure can with cement fracturing unit truck waterflood-transmission line effective connection.
2. logger car, derrick truck, cement fracturing unit truck are parked in correct position successively.Greasing pump, generator, oil hand pump also will be placed on the position far away as far as possible apart from the well site, if there is wind preferably to make it be in public attention.
3. connect blowout prevention box, lubricator, dropping against device successively, and guarantee fastening; Again greasing pipeline, earial drainage pipeline, oiling are sealed pipeline with blowout prevention box, greasing pump, the corresponding connection of oil hand pump; Connect greasing pump, air compressor machine, the relevant power line of generator and pipeline; Preventer, crossover sub are fastenedly connected with production tree top flange.
4. connect good fixing sky, lower sheave and put on test cable; Connect tension lines and tension pick-up correctly is fixed on the derrick truck hook; The lubricator hoisting wirerope is fixed on the derrick truck hook.
5. safety is lifted by crane blowout prevention box, lubricator, dropping against device union body, and connection downhole instrument and energising are checked, make it under the situation of shaft mouth test at the adjustment Blowout prevention wellhead, and it is connected firmly with crossover sub.
6. close main shutter and produce gate (gas injection well closes earlier and produces gate, and gas-producing well closes main shutter earlier).Slowly open the emptying gate with the emptying of production tree internal pressure.
7. cement fracturing unit truck waterflood-transmission line being put the empty gate of pressure with production tree is connected firmly.Open generator, air compressor machine, be ready to the greasing pump, handlance is standby.
8. guarantee test strobe, put the empty gate of pressure, under the situation that preventer, dropping against device are opened, utilize cementing truck to exert pressure for the water filling of blowout prevention system, treat to settle out when pressure is increased to 5 MPas, at this moment reinstate the high-pressure grease pouring sealing system and seal, stablize 5 minutes after, again successively with water injection pressure and greasing pressure stability in 10,15,20 MPas, and the like, after each maintenance is stablized 5-10 minute, adjust water injection pressure and greasing pressure so repeatedly, when reaching 70 MPas, stablized 20 minutes.
When 9. dismantling, stop water filling earlier, shut again and put the empty gate of pressure, under instrument monitors, slowly open pressure relief valve and put pressure, when pressure drops to 20 MPas, close the high-pressure grease pouring sealing system, treat that well head pressure reduces to after 0, can dismantle wellhead assembly or carry out other operations.
The instrument preceding well head air emptying operation of going into the well:
1. logger car, derrick truck, cement fracturing unit truck are parked in correct position successively.Greasing pump, generator oil hand pump also will be placed on the position far away as far as possible apart from the well site.If wind is arranged, preferably make it be in public attention.
2. connect blowout prevention box, lubricator, dropping against device successively; Again greasing pipeline, earial drainage pipeline, oiling sealing pipeline are connect with blowout prevention box, greasing pump, oil hand pump correspondence; Greasing pump, air compressor machine, the relevant power line of generator and pipeline have been connect; Preventer, crossover sub are fastenedly connected with production tree top flange.
3. connect fixing sky, lower sheave and put on test cable; Connect tension lines and tension pick-up is fixed on the derrick truck hook; The lubricator hoisting wirerope is fixed on the derrick truck hook.
4. safety is lifted by crane blowout prevention box, lubricator, dropping against device union body, and connection downhole instrument and energising are checked, make it under the situation of shaft mouth test at the adjustment Blowout prevention wellhead, and it is connected firmly with crossover sub.
5. close main shutter and produce gate (gas injection well closes earlier and produces gate, and gas-producing well closes main shutter earlier).Slowly open the emptying gate with the emptying of production tree internal pressure.
6. cement fracturing unit truck waterflood-transmission line being put the empty gate of pressure with production tree is connected firmly.Open generator, air compressor machine, be ready to the greasing pump, handlance is standby.
7. guarantee test strobe, put pressure empty gate, preventer, dropping against device is opened and have under the situation of pressure gauge monitoring, utilizes cementing truck to give slowly water filling in the lubricator, stops water filling when blowout prevention crown end has water to overflow, and closes emptying gate and test strobe.Then, slowly open main shutter and produce gate, make the gas well ordinary production.
8. slowly open test strobe, action must be slow, stops immediately in case hear airflow noise.At this moment,, observe blowout prevention crown portion simultaneously, treat that an adularescent natural gas emerges with pressure gauge monitor well mouth pressure situation, make it to keep 1-2 minute after, start greasing pump and handlance sealing Blowout prevention wellhead.By the time manage internal pressure when rising to 10 MPas, close test strobe, stablized five minutes.Repeat above operation, rise,, greasing pressure is transferred to is higher than well head pressure 5 MPas, stablize more than 20 minutes until pipe internal pressure and well head pressure balance with the pressure spacing of each 10 MPas.Be sure of no problem and hidden danger, open test strobe, begin well logging.
Summary is instructed in the field-strip of high-pressure grease pouring Blowout prevention wellhead:
1. monitor depth system, dropping against device situation, guarantee that logger safety enters in the lubricator.
2. slowly close test strobe, close the greasing system, open the balance pipe line after, carefully open pressure relief valve again, hearing has " neighing " sound that air-flow releases, see that the adularescent natural gas is emerged after, stop to open valve.
3. under manometric supervision, by the time managing internal pressure descends after 5 MPas, after twisting pressure relief valve greatly slightly again, stop to open valve, operating personnel are away from well head, descend after 10 MPas by the time manage internal pressure, twist pressure relief valve big slightly again, descending after 10 MPas by the time manage internal pressure again, so repeat above operation, is 0 MPa until the pipe internal pressure.
4. at this moment can dismantle high-pressure grease pouring Blowout prevention wellhead device safely.
Turbine flowmeter Up/down base jewel requires installation specification, the turbine cover size to fit, connects fasteningly, and turbine wheel shaft moderate length, mellow and full, Wugou thorn, distortion, do not have distortion and make for high-abrasive material the turbo blade rule.
The turbine flow timing is installed, keeps that turbine wheel shaft is the same, certain microgap be arranged between the lower bottom base jewel, like this, neither can influence turbine and rotate flexibly, turbine is touched down easily.
Before instrument is gone into the well, guarantee its working properly after, the flow meter turbine partly can be protected with the wax potting, to prevent that in instrument is gone into the well process turbine is blown the breakage that flies or collide with by air blast.
The calculating of down-hole instrument counterweight:
G＝P·πГ
2×10
6/g×120％
P is a well head pressure, and unit is a MPa, and Г is the choke tube radius, and unit is a rice, and π is a math constant, and g is the physics constant, gets 9.8 Newton/meter
2
Attention: pressure is excessive, when the down-hole instrument is difficult for going into the well, can consider to close in the short time production gate.
Tell and breathe out the development of record well logging company, the high-pressure sealed measuring technology of filling and gas-producing profile of exploitation, can guarantee to be not more than 70 MPas in well head pressure, annotate, gas production was not more than for 500,000 side/days, well head is not revealed, not pressure release, under the situation of responding curve of well, it is carried out dynamic monitoring, well logging one-time success rate 100%, log qualification rate 100%, the excellent rate 95% of well-log information, with my the filling and gas-producing profile interpretation software of the special exploitation of company it is carried out integrated interpretation, well-log information qualitative interpretation coincidence rate can reach 100%, well-log information quantitative interpretation coincidence rate facts have proved that more than 91% this technology can satisfy the oil field fully at present to high pressure injection, the demand of gas-producing well test.
Claims (4)
1. high-pressure sealed test method for filling and gas-producing profile is characterized in that:
A. adopt high-pressure grease pouring sealing wellhead assembly, moisture in subzero and aerogenesis during test, add the stop-leak compound additive;
B. with calculating down-hole instrument counterweight weight following man-hour:
G＝P·πГ
2×10
6/g×120％
C. adopt PVT method and the close method comparative interpretation of stream;
D. carry out pressure testing, emptying.
2. a kind of high-pressure sealed test method for filling and gas-producing profile according to claim 1 is characterized in that: go into the well from instrument, drive (50ft/min) with the time earlier, collect, from opening the well head test strobe, emptying blowout prevention inner air tube, the data when measuring pressure balance; Drive the optical viewer duty more than lasting half an hour with the time again, in order to check blowout prevention effect.Then, drive (50ft/min) by surveying in the lubricator with the degree of depth again, collect surface temperature and temperature data the influence degree of downhole conditions to pressure, temperature flex point place.
3. a kind of high-pressure sealed test method for filling and gas-producing profile according to claim 1, it is characterized in that: at interval of interest, test the speed with the cable of upper and lower 20ft/min, 40ft/min 60ft/min, 80ft/min respectively and measure seven parameter data, time actuating speed≤50ft/min.
4. a kind of high-pressure sealed test method for filling and gas-producing profile according to claim 1 is characterized in that: static temperature, the pressure of admission closing well after 1.0 hours and 1.5 hours recovers data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01131130A CN1403684A (en) | 2001-09-03 | 2001-09-03 | High-pressure sealed test method for filling and gas-producing profile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01131130A CN1403684A (en) | 2001-09-03 | 2001-09-03 | High-pressure sealed test method for filling and gas-producing profile |
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| Publication Number | Publication Date |
|---|---|
| CN1403684A true CN1403684A (en) | 2003-03-19 |
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| CN01131130A Pending CN1403684A (en) | 2001-09-03 | 2001-09-03 | High-pressure sealed test method for filling and gas-producing profile |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337850A (en) * | 2011-08-09 | 2012-02-01 | 宝鸡市赛孚石油机械有限公司 | Titanium alloy blowout-prevention pipe |
| CN105134119A (en) * | 2015-08-25 | 2015-12-09 | 新疆华油油气工程有限公司 | Sealing device for flow choking pipe |
| CN105401905A (en) * | 2015-11-26 | 2016-03-16 | 中国海洋石油总公司 | Wellhead blowout preventing device and wellhead blowout prevention method for high-temperature steel wire operation |
| CN107144471A (en) * | 2017-05-19 | 2017-09-08 | 山东大学 | A kind of pressure-bearing solution cavity Water hydraulic static pressure loading sealing device and method for model test |
| CN108533207A (en) * | 2018-06-14 | 2018-09-14 | 西安石油大佳润实业有限公司 | A kind of armored cable shaft mouth test sealing device |
| CN110644971A (en) * | 2019-10-21 | 2020-01-03 | 长沙矿山研究院有限责任公司 | Device and method for embedding monitoring sensor in upward deep hole by grouting |
| CN112443316A (en) * | 2020-11-23 | 2021-03-05 | 大庆油田有限责任公司 | Liquid CO2Logging isolation liquid presetting process |
| CN113123752A (en) * | 2019-12-31 | 2021-07-16 | 中石化石油工程技术服务有限公司 | A pressurization blowout preventer for pressurizing measurement well cementation quality |
-
2001
- 2001-09-03 CN CN01131130A patent/CN1403684A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337850A (en) * | 2011-08-09 | 2012-02-01 | 宝鸡市赛孚石油机械有限公司 | Titanium alloy blowout-prevention pipe |
| CN102337850B (en) * | 2011-08-09 | 2015-01-21 | 宝鸡市赛孚石油机械有限公司 | Titanium alloy blowout-prevention pipe |
| CN105134119A (en) * | 2015-08-25 | 2015-12-09 | 新疆华油油气工程有限公司 | Sealing device for flow choking pipe |
| CN105134119B (en) * | 2015-08-25 | 2018-10-19 | 新疆华油油气工程有限公司 | A kind of sealing device for choke tube |
| CN105401905A (en) * | 2015-11-26 | 2016-03-16 | 中国海洋石油总公司 | Wellhead blowout preventing device and wellhead blowout prevention method for high-temperature steel wire operation |
| CN107144471A (en) * | 2017-05-19 | 2017-09-08 | 山东大学 | A kind of pressure-bearing solution cavity Water hydraulic static pressure loading sealing device and method for model test |
| CN108533207A (en) * | 2018-06-14 | 2018-09-14 | 西安石油大佳润实业有限公司 | A kind of armored cable shaft mouth test sealing device |
| CN110644971A (en) * | 2019-10-21 | 2020-01-03 | 长沙矿山研究院有限责任公司 | Device and method for embedding monitoring sensor in upward deep hole by grouting |
| CN113123752A (en) * | 2019-12-31 | 2021-07-16 | 中石化石油工程技术服务有限公司 | A pressurization blowout preventer for pressurizing measurement well cementation quality |
| CN112443316A (en) * | 2020-11-23 | 2021-03-05 | 大庆油田有限责任公司 | Liquid CO2Logging isolation liquid presetting process |
| CN112443316B (en) * | 2020-11-23 | 2022-11-04 | 大庆油田有限责任公司 | Liquid CO2 Logging Spacer Fluid Presetting Technology |
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