CN108798648A - A kind of hypotonic tight gas reservoir improvement positive sequence modified isochronal test method - Google Patents
A kind of hypotonic tight gas reservoir improvement positive sequence modified isochronal test method Download PDFInfo
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- CN108798648A CN108798648A CN201810578242.7A CN201810578242A CN108798648A CN 108798648 A CN108798648 A CN 108798648A CN 201810578242 A CN201810578242 A CN 201810578242A CN 108798648 A CN108798648 A CN 108798648A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
Abstract
The present invention discloses a kind of hypotonic tight gas reservoir improvement positive sequence modified isochronal test method, includes the following steps：Collect and arrange low permeability tight gas reservoir exploration pilot production target well be drilled well, well logging, coring data, and comprehensive analysis is carried out to data, obtains the basic parameter of gas reservoir and gas well；To target well, the improvement positive sequence test pattern that 5 passes are opened using 5 carries out exploration pilot production work, wherein the gas nozzle size that drives a well amplified step by step, to obtain the increased gas well gas testing yield that drives a well step by step；In the well opening time and closed-in time of improved positive sequence test, a pass closed-in time opens well opening time more than one, remaining closed-in time is identical as well opening time, carries out well test analysis, exports explanation results.The present invention is easily obtained stable working system, and pressure recovery is not influenced more by more pass working system variations are opened, and can not only be obtained preferably test effect and be also ad save steady operation system in order to well test analysis and press later the testing time of extensive well testing.
Description
Technical field
The invention belongs to oil-gas mining technical fields, and in particular to a kind of hypotonic tight gas reservoir tries whens improving positive sequence amendment etc.
Well test method.
Background technology
Low permeability gas reservoir is widely distributed in the world, and stock number is big, all takes much count of the exploitation to such gas field both at home and abroad at present.
Low permeability gas reservoir reservoir is fine and close, reserves abundance is low, anisotropism is strong, realizes that Efficient Development difficulty is big.To exploration initial pilot development
Low permeability gas reservoir, in the case where development data is still not perfect, the working system that pilot production test is explored to it is studied, and can be
The exploration of gas reservoir is found and rationally Efficient Development provides technical support.
It is surveyed frequently with existing conventional positive sequence modified isochronal currently, carrying out pilot production to low permeability tight gas reservoir exploratory well
Method for testing, as shown in Figure 1.Conventional modified isochronal is continuously with 3-4 constant rate of production qgi(i=1,2,3,4) opening well and making production
Whether identical time t (it is required that entering the Radial Flow stage) reaches stable but regardless of stream pressure.It is typically to take yield (gas
Mouth) by the small program gradually increased.The shut-in pressure recovery time injected between each different gas nozzle opening well and making productions is identical, such as
All closing well tsTime, and the closed-in time is identical as well opening time, i.e. ts=t.Shut-in pressure is not required for being restored to stratum each time
Pressure finally carries out delay test, then implements final shut-in again.Measure the constant rate of production q produced every timegi(i=1,2,3,4,
5), the stream of its distal point presses pwfiThe yield q of (i=1,2,3,4 in general, they are non-stationary flow pressures), delay testg5
P is pressed with stationary flowwf, and the shut-in pressure p at closing well end every timewsi(i=1,2,3,4 in general, they are all unstable passes
Well pressure)." unstable capacity point " [q is used on log-log papergi,(p2 wsi-p2 wfi)] (i=1,2,3,4) work exponential form
Deliverability curve, i.e. (p2 R-p2 wf) and qgRelation curve, straight line should be obtained, this is that " unstable (exponential form) production capacity is bent
Line ", as shown in Figure 2.After stable productivity point [qg5,(p2 R-p2 wf)] make the parallel lines of transient deliverbility plot, as stablize production
Energy curve, as shown in Figure 2.
Hypotonic tight gas reservoir reservoir is fine and close, and anisotropism is strong, has hypotonic characteristic, existing positive sequence modified isochronal
Test pattern is not exclusively suitable for hypotonic tight gas reservoir.Low permeability tight gas reservoir anisotropism is strong, and some well physical property are good, yield
Height, some well physical property are medium, yield is medium, and some well physical property are poor, low output, therefore, to different exploration gas testing yield
Well should separately design its rational pilot production test job system.
For high gas rate well (q>5×104m3/ d), physical property is good, and reservoir gas supply capacity is strong, is equivalent to middle and high infiltration gas reservoir, is easy
Stable working system is measured, shut-in pressure is easy to be restored to original formation pressure.Therefore, for such prospect pit, it is proposed that use
Existing routine positive sequence modified isochronal design.
For gas stringer (q<5×103m3/ d) physical property is poor, and reservoir gas supply capacity is weak, it is difficult to measure stable duty
Degree, or even (such as 8mm and 10mm oil nozzles) possibly can not measure effective gas well flow under higher working system.Therefore, for this
Class prospect pit, it is difficult to the deliverability testing data obtained, it is proposed that open 1 pass only with existing routine 1 and press extensive Well Test Design, and 1 opens
(such as 4mm oil nozzles) is produced with small working system, as shown in Figure 3.It is recommended that using the nothing for pressing extensive well test analysis result to remove to estimate the well
Choked flow amount.
For middle gas-producing well (5 × 103m3/d<q<5×104m3/ d), physical property is medium, and reservoir gas supply capacity is medium, if to low
Permeating tight gas reservoir exploratory well uses existing positive sequence modified isochronal test pattern, continuous increased preceding 4 systems of driving a well to make
There are stronger deficits for stratum energy, and low permeability gas reservoirs well periphery natural gas feed speed is slow, causes 5 to open and is difficult to obtain stabilization
Production flowing bottomhole pressure (FBHP) and 5 close in short-term in be also difficult to be restored to original formation pressure, then can cause gas well test effect it is poor,
It can not carry out effective deliverability testing and press extensive well test analysis.Therefore, for hypotonic tight gas reservoir gas-producing well, carry out exploration wells
Reasonable Study on Test Method, undoubtedly have great importance.
Invention content
The present invention mainly overcomes shortcoming in the prior art, proposes that a kind of low permeability tight gas reservoir exploration gas testing is closed
Test method is managed, this method is easily obtained stable working system, and pressure recovery is not by the shadows for more opening more pass working system variations
It rings, preferably test effect can not only be obtained and also a save steady operation system in order to well test analysis and press extensive examination later
The testing time of well.
The present invention solves the technical solution that above-mentioned technical problem is provided：A kind of hypotonic tight gas reservoir improvement positive sequence amendment
Isochronal well testing test method, includes the following steps：
Step S10, collection and arrange low permeability tight gas reservoir exploration pilot production target well be drilled well, well logging, coring money
Material, and comprehensive analysis is carried out to data, obtain the basic parameter of gas reservoir and gas well；
Step S20, electronic pressure gauge is placed in target well shaft bottom；
Step S30, exploration pilot production work is carried out using the 5 improvement positive sequence test patterns for opening 5 passes to target well, wherein step by step
The gas nozzle size that drives a well of amplification, to obtain the increased gas well gas testing yield that drives a well step by step；In the test of improved positive sequence when driving a well
Between and the closed-in time in, one pass the closed-in time open well opening time more than one, remaining closed-in time is identical as well opening time；
Step S40, after the pilot production test jobs that 5 open 5 passes, using well test analysis software by the electron pressure of taking-up
Meter is read out, and is drawn the 5 of gas well pilot production and is opened 5 pass duty history curve graphs, carry out well test analysis, exports explanation results.
Further embodiment is, in the step S30 the specific steps are：
Step S301, first throttle gas nozzle d is placed in gas well mouth1, by the 1st well opening time t1Carry out the 1st work that drives a well
Industry obtains stable working system and the first gas well mouth aerogenesis flow q1；
Step S302, the 1st closed-in time t is pressed1sThe 1st closing well operation is carried out, the number pressure of the secondary closing well test is obtained
According to the gas nozzle that will throttle at the end of closing well is changed to the second throttling gas nozzle d2；
Step S303, the 2nd well opening time t is pressed2The 2nd operation that drives a well is carried out, is worked with small working system, is obtained
Unstable operation system point, and obtain the second gas well mouth aerogenesis flow q2；
Step S304, the 2nd closed-in time t is pressed2sThe 2nd closing well operation is carried out, the number pressure of the secondary closing well test is obtained
According to the gas nozzle that will throttle at the end of closing well replaces third throttling gas nozzle d3；
Step S305, the 3rd well opening time t is pressed3The 3rd operation that drives a well is carried out, increases working system and works, obtain
Unstable operation system point, and obtain third gas well mouth aerogenesis flow q3；
Step S306, the 3rd closed-in time t is pressed3sThe 3rd closing well operation is carried out, the number pressure of the secondary closing well test is obtained
According to the gas nozzle that will throttle at the end of closing well is changed to the 4th throttling gas nozzle d4；
Step S307, the 4th well opening time t is pressed4It carries out the 4th to drive a well operation, increases working system and work, obtain
Unstable operation system point, and obtain the 4th gas well mouth aerogenesis flow q4；
Step S308, the 4th closed-in time t is pressed4sThe 4th closing well operation is carried out, the number pressure of the secondary closing well test is obtained
According to the gas nozzle that will throttle at the end of closing well is changed to the 5th throttling gas nozzle d5；
Step S309, the 5th well opening time t is pressed5It carries out the 5th to drive a well operation, increases working system and work, obtain
Unstable operation system point, and obtain the 5th gas well mouth aerogenesis flow q5；
Step S310, the 5th closed-in time t is pressed5sThe 5th closing well operation is carried out, electronic pressure gauge is taken out after closing well,
Using pressure build-up test explanation is carried out, to obtain effective formation characteristics parameter.
Further embodiment is the first throttle gas nozzle d1, the second throttling gas nozzle d2, third throttling gas nozzle d3,
Four throttling gas nozzle d4, the 5th throttling gas nozzle d5Diameter pass through the permeability k of target well and determine；
As permeability k<When 0.001mD, first throttle gas nozzle d1, the second throttling gas nozzle d2, third throttling gas nozzle d3, the 4th
Throttle gas nozzle d4, the 5th throttling gas nozzle d5Diameter take 3mm, 3mm, 5mm, 7mm, 9mm respectively；
When permeability 0.001<k<When 0.01mD, first throttle gas nozzle d1, the second throttling gas nozzle d2, third throttling gas nozzle d3、
4th throttling gas nozzle d4, the 5th throttling gas nozzle d5Diameter take 4mm, 4mm, 6mm, 8mm, 10mm respectively；
When permeability 0.01<k<When 0.1mD, first throttle gas nozzle d1, the second throttling gas nozzle d2, third throttling gas nozzle d3,
Four throttling gas nozzle d4, the 5th throttling gas nozzle d5Diameter take 5mm, 5mm, 7mm, 9mm, 11mm respectively；
When permeability 0.1<k<When 1mD, first throttle gas nozzle d1, the second throttling gas nozzle d2, third throttling gas nozzle d3, the 4th
Throttle gas nozzle d4, the 5th throttling gas nozzle d5Diameter take 6mm, 6mm, 8mm, 10mm, 12mm respectively；
As permeability k>When 1mD, first throttle gas nozzle d1, the second throttling gas nozzle d2, third throttling gas nozzle d3, the 4th throttling
Gas nozzle d4, the 5th throttling gas nozzle d5Diameter take 7mm, 7mm, 9mm, 11mm, 13mm respectively.
Further embodiment is the 1st well opening time t1For 1000h, the 1st closed-in time t5sFor
2000h, the 5th well opening time t5, the 2nd well opening time t2, the 3rd well opening time t3, the 4th well opening time t4, the 5th
Secondary closed-in time t5s, the 2nd closed-in time t2s, the 3rd closed-in time t3s, the 4th closed-in time t4sIt is for 24 hours.
The beneficial effects of the invention are as follows：The present invention considers that low permeability tight gas reservoir reserves abundance is low, anisotropism is strong, low
The characteristic oozed devises the rational exploration pilot production well test method for being suitble to its strata condition.It is easily obtained stable duty
Degree, pressure recovery are not influenced more by more pass working system variations are opened, and can not only obtain better test effect in order to try
Well is explained, is also ad save steady operation system and is pressed later the testing time of extensive well testing.
Description of the drawings
Fig. 1 is existing positive sequence modified isochronal test pattern schematic diagram；
Fig. 2 is existing positive sequence modified isochronal exponential form deliverability curve figure；
Fig. 3 is that conventional one open-one close presses extensive well testing test pattern schematic diagram；
Fig. 4 is improved positive sequence modified isochronal test design diagram.
Specific implementation mode
Further description is done to the present invention with reference to embodiment and attached drawing.
A kind of hypotonic tight gas reservoir of the present invention improves positive sequence modified isochronal test method, includes the following steps：
Step S10, collection and arrange low permeability tight gas reservoir exploration pilot production target well be drilled well, well logging, coring money
Material, and comprehensive analysis is carried out to data, obtain the basic parameter of gas reservoir and gas well；
Step S20, electronic pressure gauge is placed in target well shaft bottom；
Step S30, exploration pilot production work is carried out using the 5 improvement positive sequence test patterns for opening 5 passes to target well, wherein step by step
The gas nozzle size that drives a well of amplification, the gas nozzle that drives a well includes first throttle gas nozzle d1, the second throttling gas nozzle d2, third throttling gas nozzle d3,
Four throttling gas nozzle d4, the 5th throttling gas nozzle d5(d1=d2<d3<d4<d5), to obtain the increased gas well gas testing yield that drives a well step by step,
The gas well gas testing yield that wherein drives a well includes the first gas well mouth aerogenesis flow q1, the second gas well mouth aerogenesis flow q2, third gas well
Well head aerogenesis flow q3, the 4th gas well mouth aerogenesis flow q4, the 5th gas well mouth aerogenesis flow q5(q1<q2<q3<q4<q5)；?
In the well opening time and closed-in time of the test of improved positive sequence, a pass closed-in time opens well opening time more than one, when remaining closing well
Between it is identical as well opening time；
Step S301, first throttle gas nozzle d is placed in gas well mouth1, by the 1st well opening time t1Carry out the 1st work that drives a well
Industry obtains stable working system and the first gas well mouth aerogenesis flow q1；
Step S302, the 1st closed-in time t is pressed1sThe 1st closing well operation is carried out, the number pressure of the secondary closing well test is obtained
According to the gas nozzle that will throttle at the end of closing well is changed to the second throttling gas nozzle d2；
Step S303, the 2nd well opening time t is pressed2The 2nd operation that drives a well is carried out, is worked with small working system, is obtained
Unstable operation system point, and obtain the second gas well mouth aerogenesis flow q2；
Step S304, the 2nd closed-in time t is pressed2sThe 2nd closing well operation is carried out, the number pressure of the secondary closing well test is obtained
According to the gas nozzle that will throttle at the end of closing well replaces third throttling gas nozzle d3；
Step S305, the 3rd well opening time t is pressed3The 3rd operation that drives a well is carried out, increases working system and works, obtain
Unstable operation system point, and obtain third gas well mouth aerogenesis flow q3；
Step S306, the 3rd closed-in time t is pressed3sThe 3rd closing well operation is carried out, the number pressure of the secondary closing well test is obtained
According to the gas nozzle that will throttle at the end of closing well is changed to the 4th throttling gas nozzle d4；
Step S307, the 4th well opening time t is pressed4It carries out the 4th to drive a well operation, increases working system and work, obtain
Unstable operation system point, and obtain the 4th gas well mouth aerogenesis flow q4；
Step S308, the 4th closed-in time t is pressed4sThe 4th closing well operation is carried out, the number pressure of the secondary closing well test is obtained
According to the gas nozzle that will throttle at the end of closing well is changed to the 5th throttling gas nozzle d5；
Step S309, the 5th well opening time t is pressed5It carries out the 5th to drive a well operation, increases working system and work, obtain
Unstable operation system point, and obtain the 5th gas well mouth aerogenesis flow q5；
Step S310, the 5th closed-in time t is pressed5sThe 5th closing well operation is carried out, electronic pressure gauge is taken out after closing well,
Using pressure build-up test explanation is carried out, to obtain effective formation characteristics parameter.
Step S40, after the pilot production test jobs that 5 open 5 passes, using well test analysis software by the electron pressure of taking-up
Meter is read out, and is drawn the 5 of gas well pilot production and is opened 5 pass duty history curve graphs, carry out well test analysis, exports explanation results.
Wherein, the first throttle gas nozzle d1, the second throttling gas nozzle d2, third throttling gas nozzle d3, the 4th throttling gas nozzle d4、
5th throttling gas nozzle d5Diameter pass through the permeability k of target well and determine；
As permeability k<When 0.001mD, first throttle gas nozzle d1, the second throttling gas nozzle d2, third throttling gas nozzle d3, the 4th
Throttle gas nozzle d4, the 5th throttling gas nozzle d5Diameter take 3mm, 3mm, 5mm, 7mm, 9mm respectively；
When permeability 0.001<k<When 0.01mD, first throttle gas nozzle d1, the second throttling gas nozzle d2, third throttling gas nozzle d3、
4th throttling gas nozzle d4, the 5th throttling gas nozzle d5Diameter take 4mm, 4mm, 6mm, 8mm, 10mm respectively；
When permeability 0.01<k<When 0.1mD, first throttle gas nozzle d1, the second throttling gas nozzle d2, third throttling gas nozzle d3,
Four throttling gas nozzle d4, the 5th throttling gas nozzle d5Diameter take 5mm, 5mm, 7mm, 9mm, 11mm respectively；
When permeability 0.1<k<When 1mD, first throttle gas nozzle d1, the second throttling gas nozzle d2, third throttling gas nozzle d3, the 4th
Throttle gas nozzle d4, the 5th throttling gas nozzle d5Diameter take 6mm, 6mm, 8mm, 10mm, 12mm respectively；
As permeability k>When 1mD, first throttle gas nozzle d1, the second throttling gas nozzle d2, third throttling gas nozzle d3, the 4th throttling
Gas nozzle d4, the 5th throttling gas nozzle d5Diameter take 7mm, 7mm, 9mm, 11mm, 13mm respectively.
The 1st well opening time t1For 1000h, the 1st closed-in time t5sFor 2000h, when described the 5th drives a well
Between t5, the 2nd well opening time t2, the 3rd well opening time t3, the 4th well opening time t4, the 5th closed-in time t5s, the 2nd closing well
Time t2s, the 3rd closed-in time t3s, the 4th closed-in time t4sIt is for 24 hours.
Conventional positive sequence modified isochronal test needs the testing time grown just gas well can be made to reach stable work very
System, the flowing bottomhole pressure (FBHP) of opening well and making production reach stable and closing well recovery pressure and reach original formation pressure.The present invention considers
The characteristic that low permeability tight gas reservoir reserves abundance is low, anisotropism is strong, hypotonic, devises and is suitble to the rational of its strata condition
Pilot production well test method is explored, is easily obtained stable working system, pressure recovery is not closed working systems variations by opening more more
It influences, preferably test effect can not only be obtained and also a save steady operation system in order to well test analysis and press later extensive
The testing time of well testing has potential application and popularization value.
The above is not intended to limit the present invention in any form, although the present invention is taken off by above-described embodiment
Show, however, it is not intended to limit the invention, any person skilled in the art, is not departing from technical solution of the present invention range
It is interior, when the technology contents using the disclosure above make a little equivalent embodiments changed or be modified to equivalent variations, as long as being not
Be detached from technical solution of the present invention content, according to the technical essence of the invention to made by above example it is any it is simple modification,
Equivalent variations and modification, in the range of still falling within technical solution of the present invention.
Claims (4)
1. a kind of hypotonic tight gas reservoir improves positive sequence modified isochronal test method, which is characterized in that include the following steps：
Step S10, collection and arrange low permeability tight gas reservoir exploration pilot production target well be drilled well, well logging, coring data, and
Comprehensive analysis is carried out to data, obtains the basic parameter of gas reservoir and gas well；
Step S20, electronic pressure gauge is placed in target well shaft bottom；
Step S30, exploration pilot production work is carried out using the 5 improvement positive sequence test patterns for opening 5 passes to target well, wherein amplifying step by step
The gas nozzle size that drives a well, to obtain the increased gas well gas testing yield that drives a well step by step；Improved positive sequence test well opening time and
In closed-in time, a pass closed-in time opens well opening time more than one, remaining closed-in time is identical as well opening time；
Step S40, after the pilot production test jobs that 5 open 5 passes, using well test analysis software by the electronic pressure gauge of taking-up into
Row is read, and is drawn the 5 of gas well pilot production and is opened 5 pass duty history curve graphs, carry out well test analysis, exports explanation results.
2. a kind of hypotonic tight gas reservoir according to claim 1 improves positive sequence modified isochronal test method, feature
Be, in the step S30 the specific steps are：
Step S301, first throttle gas nozzle d is placed in gas well mouth1, by the 1st well opening time t1The 1st operation that drives a well is carried out,
Obtain stable working system and the first gas well mouth aerogenesis flow q1；
Step S302, the 1st closed-in time t is pressed1sThe 1st closing well operation is carried out, the pressure data of the secondary closing well test is obtained, closes
Throttling gas nozzle is changed to the second throttling gas nozzle d at the end of well2；
Step S303, the 2nd well opening time t is pressed2The 2nd operation that drives a well is carried out, is worked with small working system, is obtained unstable
Determine working system point, and obtains the second gas well mouth aerogenesis flow q2；
Step S304, the 2nd closed-in time t is pressed2sThe 2nd closing well operation is carried out, the pressure data of the secondary closing well test is obtained, closes
Throttling gas nozzle is replaced into third throttling gas nozzle d at the end of well3；
Step S305, the 3rd well opening time t is pressed3The 3rd operation that drives a well is carried out, increases working system and works, is obtained unstable
Determine working system point, and obtains third gas well mouth aerogenesis flow q3；
Step S306, the 3rd closed-in time t is pressed3sThe 3rd closing well operation is carried out, the pressure data of the secondary closing well test is obtained, closes
Throttling gas nozzle is changed to the 4th throttling gas nozzle d at the end of well4；
Step S307, the 4th well opening time t is pressed4It carries out the 4th to drive a well operation, increases working system and work, obtain unstable
Determine working system point, and obtains the 4th gas well mouth aerogenesis flow q4；
Step S308, the 4th closed-in time t is pressed4sThe 4th closing well operation is carried out, the pressure data of the secondary closing well test is obtained, closes
Throttling gas nozzle is changed to the 5th throttling gas nozzle d at the end of well5；
Step S309, the 5th well opening time t is pressed5It carries out the 5th to drive a well operation, increases working system and work, obtain unstable
Determine working system point, and obtains the 5th gas well mouth aerogenesis flow q5；
Step S310, the 5th closed-in time t is pressed5sThe 5th closing well operation is carried out, electronic pressure gauge is taken out after closing well, is utilized
Pressure build-up test explanation is carried out, to obtain effective formation characteristics parameter.
3. a kind of hypotonic tight gas reservoir according to claim 2 improves positive sequence modified isochronal test method, feature
It is, the first throttle gas nozzle d1, the second throttling gas nozzle d2, third throttling gas nozzle d3, the 4th throttling gas nozzle d4, the 5th throttling
Gas nozzle d5Diameter pass through the permeability k of target well and determine；
As permeability k<When 0.001mD, first throttle gas nozzle d1, the second throttling gas nozzle d2, third throttling gas nozzle d3, the 4th throttling
Gas nozzle d4, the 5th throttling gas nozzle d5Diameter take 3mm, 3mm, 5mm, 7mm, 9mm respectively；
When permeability 0.001<k<When 0.01mD, first throttle gas nozzle d1, the second throttling gas nozzle d2, third throttling gas nozzle d3, the 4th
Throttle gas nozzle d4, the 5th throttling gas nozzle d5Diameter take 4mm, 4mm, 6mm, 8mm, 10mm respectively；
When permeability 0.01<k<When 0.1mD, first throttle gas nozzle d1, the second throttling gas nozzle d2, third throttling gas nozzle d3, Section four
Gas mouth d4, the 5th throttling gas nozzle d5Diameter take 5mm, 5mm, 7mm, 9mm, 11mm respectively；
When permeability 0.1<k<When 1mD, first throttle gas nozzle d1, the second throttling gas nozzle d2, third throttling gas nozzle d3, the 4th throttling
Gas nozzle d4, the 5th throttling gas nozzle d5Diameter take 6mm, 6mm, 8mm, 10mm, 12mm respectively；
As permeability k>When 1mD, first throttle gas nozzle d1, the second throttling gas nozzle d2, third throttling gas nozzle d3, the 4th throttling gas nozzle
d4, the 5th throttling gas nozzle d5Diameter take 7mm, 7mm, 9mm, 11mm, 13mm respectively.
4. a kind of hypotonic tight gas reservoir according to claim 2 improves positive sequence modified isochronal test method, feature
It is, the 1st well opening time t1For 1000h, the 1st closed-in time t5sFor 2000h, the 5th well opening time
t5, the 2nd well opening time t2, the 3rd well opening time t3, the 4th well opening time t4, the 5th closed-in time t5s, the 2nd closing well when
Between t2s, the 3rd closed-in time t3s, the 4th closed-in time t4sIt is for 24 hours.
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| CN111088974A (en) * | 2019-11-29 | 2020-05-01 | 中国石油集团川庆钻探工程有限公司 | Productivity evaluation method for determining unstable flowing pressure correction of low-permeability gas well |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6378627B1 (en) * | 1996-09-23 | 2002-04-30 | Intelligent Inspection Corporation | Autonomous downhole oilfield tool |
| US20030141068A1 (en) * | 2001-04-24 | 2003-07-31 | Pierre De Rouffignac Eric | In situ thermal processing through an open wellbore in an oil shale formation |
| CN102536222A (en) * | 2012-01-09 | 2012-07-04 | 中国石油天然气集团公司 | Analog evaluation device for evaluating damage of coalbed methane reservoir polluted by external fluid |
| CN206114018U (en) * | 2016-10-09 | 2017-04-19 | 无锡洋湃科技有限公司 | Measure in heterogeneous stream gas -liquid two -phase critical flow nozzle flowmeter of flow separately |
| US20170159422A1 (en) * | 2011-12-22 | 2017-06-08 | James N. McCoy | Hydrocarbon Well Performance Monitoring System |
| CN107301306A (en) * | 2017-08-04 | 2017-10-27 | 中国石油化工股份有限公司华北油气分公司 | Dynamic open-flow capacity Forecasting Methodology for DAMAGE OF TIGHT SAND GAS RESERVOIRS pressure break horizontal well |
| CN107545109A (en) * | 2017-08-31 | 2018-01-05 | 中国石油大学(北京) | Coal bed gas field acquisition system optimization method |
-
2018
- 2018-06-07 CN CN201810578242.7A patent/CN108798648A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6378627B1 (en) * | 1996-09-23 | 2002-04-30 | Intelligent Inspection Corporation | Autonomous downhole oilfield tool |
| US20030141068A1 (en) * | 2001-04-24 | 2003-07-31 | Pierre De Rouffignac Eric | In situ thermal processing through an open wellbore in an oil shale formation |
| US20170159422A1 (en) * | 2011-12-22 | 2017-06-08 | James N. McCoy | Hydrocarbon Well Performance Monitoring System |
| CN102536222A (en) * | 2012-01-09 | 2012-07-04 | 中国石油天然气集团公司 | Analog evaluation device for evaluating damage of coalbed methane reservoir polluted by external fluid |
| CN206114018U (en) * | 2016-10-09 | 2017-04-19 | 无锡洋湃科技有限公司 | Measure in heterogeneous stream gas -liquid two -phase critical flow nozzle flowmeter of flow separately |
| CN107301306A (en) * | 2017-08-04 | 2017-10-27 | 中国石油化工股份有限公司华北油气分公司 | Dynamic open-flow capacity Forecasting Methodology for DAMAGE OF TIGHT SAND GAS RESERVOIRS pressure break horizontal well |
| CN107545109A (en) * | 2017-08-31 | 2018-01-05 | 中国石油大学(北京) | Coal bed gas field acquisition system optimization method |
Non-Patent Citations (1)
| Title |
|---|
| 钟孚勋: "《气藏工程》", 28 February 2001, 石油工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111088974A (en) * | 2019-11-29 | 2020-05-01 | 中国石油集团川庆钻探工程有限公司 | Productivity evaluation method for determining unstable flowing pressure correction of low-permeability gas well |
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