CN105804713A - Method for rapidly determining water-injection starting pressure of wellheads in all small layers of water injection well - Google Patents
Method for rapidly determining water-injection starting pressure of wellheads in all small layers of water injection well Download PDFInfo
- Publication number
- CN105804713A CN105804713A CN201610199788.2A CN201610199788A CN105804713A CN 105804713 A CN105804713 A CN 105804713A CN 201610199788 A CN201610199788 A CN 201610199788A CN 105804713 A CN105804713 A CN 105804713A
- Authority
- CN
- China
- Prior art keywords
- water injection
- water
- substratum
- well
- injection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 128
- 238000002347 injection Methods 0.000 title claims abstract description 100
- 239000007924 injection Substances 0.000 title claims abstract description 100
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000012360 testing method Methods 0.000 claims abstract description 63
- 238000010521 absorption reaction Methods 0.000 claims abstract description 7
- 230000002459 sustained effect Effects 0.000 claims description 2
- 238000011161 development Methods 0.000 abstract description 9
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 18
- 239000010410 layer Substances 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000011084 recovery Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003027 oil sand Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to the technical field of oilfield development and maintenance, in particular to a method for rapidly determining water-injection starting pressure of wellheads in all small layers of a water injection well. The method utilizes interpretation results of two tests on a water injection profile of each small layer of the water injection well to obtain two different water injection flow of each small layer, and connect two coordinates of each small layer including an X-coordinate representing daily water absorption amount and an ordinate representing water injection pressure value of each wellhead to form a straight line acting as a water injection indication curve of each small layer. The water injection starting pressure of a wellhead in each layer is an intercept formed after the water injection indication curve extends and intersects each ordinate at a point. The method only utilizes two interpretation results of two tests on a water injection profile of each small layer to process data, draw dots and lines so that starting pressure of each wellhead in each small layer. High in adaptability, easy in operation and few in investment, the method is capable of accurately measuring wellhead-starting pressure of thin interbeds and of all small layers at different depth.
Description
Technical field
The present invention relates to oil field development maintenance technology field, particularly to a kind of method quickly determining that each substratum well head water filling of water injection well starts pressure.
Background technology
In oilfield development process, along with the passage of oil field development time, formation pressure is gradually reduced, and in order to realize the exploitation of long-term stability, it is necessary to supplement energy to stratum, keeps the pressure of oil reservoir.Method currently mainly is to adopt water filling to keep formation pressure.Therefore, when oil field development except boring a collection of producing well, also to bore a collection of water injection well.By water injection well to down-hole oil-bearing stratum flooding, maintain formation pressure and make oil well output remain stable for.In order to understand each oil reservoir water swelling elastomer of water injection well, it is necessary to survey intake profile, understand the absolute injection rate of each substratum.For same water injection well, owing to subsurface reservoir exists multiple Development layer series and the difference of the physical property such as reservoir rocks, fluid, cause in waterflooding extraction process, exist and inject the situation that each substratum difficulty or ease of water entrance are different.Particularly to hypotonic, ultralow permeable reservoir, reservoir porous hole is narrow, radius only several microns are shouted in hole, these part reserves are made to be difficult to employ, generally only when water injection pressure meets or exceeds a certain marginal value, fluid in porous media just can start flowing, and startup pressure is and makes fluid in porous media start pressure when flowing.At present, major part water controlled field enters mid-later development phase, Reservoir Heterogeneity is day by day serious, corresponding well stimulation must be taked, and its successful basis is to grasp each substratum to start pressure immediately, accurately, in order to oil field development personnel arrange the development plan of oil field, well group, individual well, carry out measure targetedly, improve production efficiency and the water drive swept volume of each interlayer, and finally improve oil recovery factor.
At present, the method that reservoir starts stress test mainly has three classes: first method is laboratory experiment method, and including single-phase and two-phase starting pressure gradient mensuration, owing to rock core used and stratum truth difference are relatively big, the more on-the-spot difference of result of test is also very big；The problems such as second method is downhole testing method, including oxygen activation logging, layered pulling and running test etc., is primarily present operations number many, and fund input is big, testing time length, and cannot test for alternate thin beds reservoir, high angle hole；The third method is the mathematical calculation based on experimental data, and the impact that result of calculation is artificially adjusted by mathematical model and variable is very big, and resultant error is big.
Summary of the invention
The present invention is directed to the deficiency measuring each layer startup pressure method of water injection well in prior art, it is provided that a kind of method quickly determining each substratum well head water filling startup pressure of water injection well that operation is simple.
The object of the present invention is achieved like this, a kind of method quickly determining that each substratum well head water filling of water injection well starts pressure, including following process: 1) calibrate Pressure gauge and water injection manifold scale that wellhead of water injection well to be measured connects with water pump, the instrument, the oil pipe that check and guarantee to test for profile-log of water injection to be measured are normal；2) well depth according to each substratum of water injection well to be measured, the well depth position entering each substratum under the instrument of intake profile test of each substratum, oil pipe is detected by being used for, carry out the intake profile test of each substratum with the day injection flow water filling of Q1 in well, after the force value of observation well head pressure gauge is stablized, record well head water injection pressure when this manometric pressure value P 1 is Q1 injection flow, then turn off water filling, take out downhole testing tool string, record the explanation results of the intake profile test of each substratum, this water injection well is recovered daily water filling work simultaneously；3) terminate from intake profile test last time and recover after normal daily water filling works 8 10 hours, water injection well to be measured is carried out second time intake profile test, during test, day injection flow is Q2, after the force value of well head pressure gauge is stable, records well head water injection pressure when this manometric pressure value P 2 is Q2 injection flow, then turn off water filling, take out testing tool string, again record the explanation results of the intake profile test of each substratum；4) explanation results according to twice intake profile test, obtain each substratum at two not injection flows on the same day, day water absorption under different injection pressures, it is abscissa by day water absorption respectively for each substratum, well head water injection pressure value is vertical coordinate described point, then twice retouched coordinate points is connected life and be the water injection indication curve of this substratum in line, after the prolongation of described water injection indication curve, be the well head water filling startup pressure of this substratum with the vertical intercept doing the formation of target intersection point of sitting.
In the present invention, utilize the flow linear relationship with well intake pressure that absorbs water day in twice intake profile test data of each substratum, the startup pressure of each substratum can be determined easily through simple work mark described point line of sitting.Owing to intake profile test manages daily monitoring means for oil-water well, the method of the present invention only need to carry out simple data by the explanation results of twice intake profile test and process and described point line drawing, namely can determine that the well head of each substratum starts pressure, do not need other test equipment and test program, strong adaptability, simple to operate, less investment, and can accurately measure the well head water filling startup pressure of each substratum of alternate thin beds reservoir, high angle hole different depth, stratum will not be caused other pollution.
For accurately measuring the startup pressure of each substratum in daily water filling, described step 2 further) in intake profile test time day injection flow when working with the daily water filling of water injection well to be measured day injection flow Q1 identical.The day injection flow identical with daily water filling is adopted to carry out intake profile test, can accurately measure the water suction situation of each substratum in daily water filling, if Q1 value is too small, the low-permeability layer of meeting test leakage fine pore, if Q1 value is excessive, then additionally can measure the high compacted zone that cannot recover the oil more, cause resource wave to give up.
For ensureing accurately to describe the water injection indication curve of each substratum, day injection flow Q2=(1.5 2 when the second time intake profile in described step 3) is tested) Q1.
For being further ensured that the accuracy of second time intake profile measurement result, in described step 3), second time intake profile test day injection flow when starting front daily water filling is Q2, and sustained water injection 58 hours.Before carrying out intake profile test, time in advance to test day injection flow to each substratum water filling, it is possible to shorten the time that during intake profile test, well head water injection pressure is stable, shorten the testing time, reduce test injection rate.
Accompanying drawing explanation
Fig. 1 is the water injection indication curve adopting the W5-18 well that the method quickly determining each substratum well head water filling startup pressure of water injection well of the present invention carries out to produce layer.
Detailed description of the invention
The present embodiment is with certain oil field W5-18 well location in structure high-order bit, W5 block northeast, and table 1 show the oil sand body data sheet of this well, and this well divides 2 series of strata exploitations, wherein Ef at present2 3Mean permeability is 96.1 × 10-3μm2, average pore is 21.3%,.Ef1 1Mean permeability is 191.7 × 10-3μm2, average pore is 23.5%, has middle high poroperm characteristics, belongs to shallow-thin layer many stratiforms common heavy oil reservoir.Oil reservoir buried depth is at 1000～1080m, and formation temperature is 53.5 DEG C, and strata pressure is 9.72MPa, and reset pressure coefficient is close to 1.0.This layer of water injection pressure is relatively low, and intake profile display water filling interlayer contradiction is had outstanding performance, and reservoir properties condition is better, and well pattern condition is more perfect, and recovery percent of reserves is on the low side, and remaining oil is more.The Ef of this well2 3Layer and Ef1 1Layer the 5th layer, 11th layer oil reservoir partially dry, do not penetrate out during oil recovery, so the present embodiment only carries out the test of the 6th 10 layer.
Table 1
。
The method quickly determining each substratum well head water filling startup pressure of water injection well in the present embodiment, including following process: 1) calibrate Pressure gauge and water injection manifold scale that wellhead of water injection well to be measured connects with water pump, the instrument, the pipe that check and guarantee to test for profile-log of water injection to be measured are normal；2) according to table 1, this well head water filling mainly testing five substratums that substratum sequence number is 6 10 layers starts pressure, according to the well depth treating each substratum in side, entered the well depth position of each substratum, with 30m in well under the instrument tested by intake profile3The day injection flow of/d injects intake profile test water to each substratum, this injection flow is the flow that daily water filling adopts, after observation well head is stablized for the manometric force value surveying inspection water injection pressure, recording this manometric pressure value P 1 is 14.2MPa,, then turn off water filling, take out downhole testing tool string, the explanation results of the intake profile test recording each substratum is as shown in table 2, and this water injection well continues to recover daily water filling work simultaneously；For ease of the carrying out of intake profile test next time, this stage adopts 50m3/ d daily water-injection rate carries out daily water filling；3) terminate from intake profile test last time and recover normal daily water filling to work after 8 10h, water injection well to be measured is carried out second time intake profile test, during test, day injection flow be 50m3/ d, after the force value of well head pressure gauge is stable, recording this manometric pressure value P 2 is 20.3MPa, then turns off water filling, takes out testing tool string, and the explanation results of the intake profile test again recording each substratum is as shown in table 2；4) explanation results according to twice intake profile test, obtain each substratum at two not injection flows on the same day, day water absorption under different injection pressures is as shown in table 3, then it is abscissa by day water absorption respectively for each substratum, well head water injection pressure value is vertical coordinate described point, again twice retouched coordinate points is connected the raw water injection indication curve being this substratum in line, the intercept formed with the intersection point of vertical coordinate after water injection indication curve prolongation is the well head water filling of this substratum and starts pressure, describe the water injection indication curve of each substratum respectively successively, as shown in Figure 1, show that the well head water filling of each substratum starts pressure result respectively according to the curve of this figure as shown in table 4.This method test result can make each substratum of this water injection well of oil recovery technique personnel couple start pressure have been had and immediately has understood and grasped accurately, for the formulation reliable foundation of offer of regular maintenance and stratum renovation technique measure.And the present invention tests each substratum and starts the method for pressure and can complete by the intake profile test data that water injection well is daily twice, it is not necessary to other test equipment and test process.
Table 2
。
Table 3
。
Table 4
Claims (4)
1. quickly determine the method that each substratum well head water filling of water injection well starts pressure, including following process:
1) calibrating Pressure gauge and water injection manifold scale that wellhead of water injection well to be measured connects with water injecting pump, the instrument, the oil pipe that check and guarantee to test for profile-log of water injection to be measured are normal；2) well depth according to each substratum of water injection well to be measured, the well depth position entering each substratum under the instrument of each substratum intake profile test, oil pipe is detected by being used for, carry out the intake profile test of each substratum with the day injection flow water filling of Q1 in well, after the force value of observation well head pressure gauge is stablized, record well head water injection pressure when this manometric pressure value P 1 is with Q1 day injection flow, then turn off water filling, take out downhole testing tool string, record the explanation results of the intake profile test of each substratum, this water injection well is recovered daily water filling work simultaneously；3) terminate from intake profile test last time and recover after normal daily water filling works 8 10 hours, water injection well to be measured is carried out second time intake profile test, during test, day injection flow is Q2, after the force value of well head pressure gauge is stable, records well head water injection pressure when this manometric pressure value P 2 is Q2 day injection flow, then turn off water filling, take out testing tool string, again record the explanation results of the intake profile test of each substratum；4) explanation results according to twice intake profile test, obtain each substratum at two not injection flows on the same day, day water absorption under different injection pressures, it is abscissa by day water absorption respectively for each substratum, well head water injection pressure value is vertical coordinate described point, then being retouched twice and make punctuate and connect the raw water injection indication curve being this substratum in line, described water injection indication curve is made the intercept that target intersection point formed and is the well head water filling of this substratum with vertical seat and starts pressure after extending.
2. the method quickly determining that each substratum well head water filling of water injection well starts pressure according to claim 1, it is characterized in that, described step 2) in intake profile test time day injection flow when working with the daily water filling of water injection well to be measured day injection flow Q1 identical.
3. the method quickly determining that each substratum well head water filling of water injection well starts pressure according to claim 1, it is characterised in that day injection flow Q2=(1.5 2 when the second time intake profile in described step 3) is tested) Q1.
4. the method quickly determining that each substratum well head water filling of water injection well starts pressure according to claim 1, it is characterised in that the day injection flow when test of second time intake profile starts front daily water filling in described step 3) is Q2, and sustained water injection 58 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610199788.2A CN105804713B (en) | 2016-04-01 | 2016-04-01 | A kind of quick method for determining each substratum well head water filling of water injection well and starting pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610199788.2A CN105804713B (en) | 2016-04-01 | 2016-04-01 | A kind of quick method for determining each substratum well head water filling of water injection well and starting pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105804713A true CN105804713A (en) | 2016-07-27 |
| CN105804713B CN105804713B (en) | 2018-03-20 |
Family
ID=56459471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610199788.2A Active CN105804713B (en) | 2016-04-01 | 2016-04-01 | A kind of quick method for determining each substratum well head water filling of water injection well and starting pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105804713B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321076A (en) * | 2016-10-19 | 2017-01-11 | 中国石油化工股份有限公司 | Method for testing starting pressure of water injection well |
| CN109978303A (en) * | 2017-12-28 | 2019-07-05 | 中国石油天然气股份有限公司 | The determination method, apparatus and storage medium of the exploitation measure of heavy crude reservoir |
| CN109989744A (en) * | 2017-12-29 | 2019-07-09 | 中国石油天然气股份有限公司 | Carbonate rock covers the calculation method and device of Reservoir Body oil well production pressure difference more |
| CN110005402A (en) * | 2017-12-29 | 2019-07-12 | 中国石油天然气股份有限公司 | The calculation method and device of carbonate rock oil well producing pressure differential |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2387816C1 (en) * | 2009-04-23 | 2010-04-27 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Method of cluster water injection into fill-in wells |
| CN102418511A (en) * | 2011-07-25 | 2012-04-18 | 中国石油天然气股份有限公司 | Draw-down test analysis method for underground shut-in water well with low-permeability storage layer |
| CN103291265A (en) * | 2013-06-24 | 2013-09-11 | 西南石油大学 | Method for judging full profile control degree of water injection well |
| CN104318052A (en) * | 2014-09-16 | 2015-01-28 | 中国石油大学(北京) | Low-permeability oil reservoir water flooding wave and coefficient evaluation method |
| CN104879103A (en) * | 2015-05-22 | 2015-09-02 | 中国石油天然气股份有限公司 | Layered water injection effect analysis method |
-
2016
- 2016-04-01 CN CN201610199788.2A patent/CN105804713B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2387816C1 (en) * | 2009-04-23 | 2010-04-27 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Method of cluster water injection into fill-in wells |
| CN102418511A (en) * | 2011-07-25 | 2012-04-18 | 中国石油天然气股份有限公司 | Draw-down test analysis method for underground shut-in water well with low-permeability storage layer |
| CN103291265A (en) * | 2013-06-24 | 2013-09-11 | 西南石油大学 | Method for judging full profile control degree of water injection well |
| CN104318052A (en) * | 2014-09-16 | 2015-01-28 | 中国石油大学(北京) | Low-permeability oil reservoir water flooding wave and coefficient evaluation method |
| CN104879103A (en) * | 2015-05-22 | 2015-09-02 | 中国石油天然气股份有限公司 | Layered water injection effect analysis method |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321076A (en) * | 2016-10-19 | 2017-01-11 | 中国石油化工股份有限公司 | Method for testing starting pressure of water injection well |
| CN106321076B (en) * | 2016-10-19 | 2021-05-04 | 中国石油化工股份有限公司 | Water injection well starting pressure testing method |
| CN109978303A (en) * | 2017-12-28 | 2019-07-05 | 中国石油天然气股份有限公司 | The determination method, apparatus and storage medium of the exploitation measure of heavy crude reservoir |
| CN109989744A (en) * | 2017-12-29 | 2019-07-09 | 中国石油天然气股份有限公司 | Carbonate rock covers the calculation method and device of Reservoir Body oil well production pressure difference more |
| CN110005402A (en) * | 2017-12-29 | 2019-07-12 | 中国石油天然气股份有限公司 | The calculation method and device of carbonate rock oil well producing pressure differential |
| CN109989744B (en) * | 2017-12-29 | 2022-05-10 | 中国石油天然气股份有限公司 | Method and device for calculating production pressure difference of multiple sets of reservoir bodies of carbonate rock |
| CN110005402B (en) * | 2017-12-29 | 2022-05-10 | 中国石油天然气股份有限公司 | Method and device for calculating production pressure difference of carbonate oil well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105804713B (en) | 2018-03-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| He et al. | Waterflood direction and front characterization with four-step work flow: a case study in changqing oil field China | |
| CN103649463B (en) | System and method for performing well stimulation job | |
| CN103902827B (en) | Flow unit division method of carbonate-rock horizontal wells | |
| AU2013219864B2 (en) | Method for determining a permeability or mobility of a radial flow response of a reservoir | |
| CN106522928B (en) | Well testing method for unstable pressure drop of well logging head by stopping pump after acidizing and fracturing | |
| CN105547967B (en) | Fissuted medium system permeability tensor indoor measurement device | |
| CN104500054B (en) | The determination method and device of formation pore pressure | |
| CN105804713B (en) | A kind of quick method for determining each substratum well head water filling of water injection well and starting pressure | |
| CN105178943A (en) | Method for correcting well shaft pressure in real time | |
| CN205538580U (en) | Indoor survey device of fissuted medium system infiltration tensor | |
| CN104406895A (en) | Novel coal bed permeability testing device and method | |
| CN114372352A (en) | Method for predicting peak shaving capacity of complex fault block oil reservoir gas storage by seepage-temperature double-field coupling numerical simulation | |
| CN103161436B (en) | A kind of heavy crude heat extraction horizontal well Well Test Data Analysis Method | |
| Ismadi et al. | The use of combined static-and dynamic-material-balance methods with real-time surveillance data in volumetric gas reservoirs | |
| CN105443093A (en) | Combined well mouth testing device for polymer injection well and method thereof | |
| Ma et al. | Simulation and interpretation of the pressure response for formation testing while drilling | |
| CN101050699B (en) | Method for obtaining thick oil layer vertical permeability using same layer vertical interference test well and test tubular pole | |
| CN108678672A (en) | Deep water superficial part complex lithology formation conduit is efficiently placed in and well head stability forecast method | |
| CN114880962A (en) | Stratum seepage-shaft pipe flow coupling-based integrated analysis method for single-well injection and production capacity of tight gas reservoir | |
| Zou et al. | Investigating reservoir pressure transmission for three types of coalbed methane reservoirs in the Qinshui Basin in Shan’xi Province, China | |
| CN204255815U (en) | A kind of novel coal seam permeability tester for testing | |
| CN109594965A (en) | A kind of difference producing pressure differential carbon dioxide drive technical limit well space optimization method | |
| CN102562052A (en) | Method for recognizing harm bodies of casing failure of shallow layer of close well spacing | |
| CN108343431B (en) | Method for exploring flow network of bedrock fracture underground water system | |
| CN114991728B (en) | Simulated CO 2 Electrical tomography experimental device, method and application of gas-driven oil reservoir |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |