CN109632574A - The evaluation method of drag reducer additional amount in offshore oil and gas field gathering line - Google Patents
The evaluation method of drag reducer additional amount in offshore oil and gas field gathering line Download PDFInfo
- Publication number
- CN109632574A CN109632574A CN201811593942.XA CN201811593942A CN109632574A CN 109632574 A CN109632574 A CN 109632574A CN 201811593942 A CN201811593942 A CN 201811593942A CN 109632574 A CN109632574 A CN 109632574A
- Authority
- CN
- China
- Prior art keywords
- drag reducer
- gathering line
- difference
- crude oil
- head end
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/02—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material
- G01N11/04—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture
- G01N11/06—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture by timing the outflow of a known quantity
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fats And Perfumes (AREA)
Abstract
The present invention relates to the evaluation methods of drag reducer additional amount in offshore oilfield gathering line, when drag reducer is not added in gathering line head end, record the pressure K of gathering line head end1, while the experiment of falling cup is being carried out, record the residual mass M of cup Crude Oil1；Drag reducer is added in gathering line head end, the initial filling concentration of drag reducer is X1, record pressure K2, mass M2；If K2And K1Difference be greater than 30 kPa or M2And M1Difference when being greater than 0.5g, the additional amount for continuing growing drag reducer is recycled according to above-mentioned steps, until KnAnd Kn‑1Difference be less than or equal to 30 kPa and MnAnd Mn‑1Difference be less than or equal to 0.5g when, stop increase drag reducer filling concentration.The present invention according to gathering line set out residual crude oil in end pressure situation of change and the receiving end experiment of falling cup quality change situation in conjunction with come the method for evaluating drag reducer, method is simple, and experimental data is accurate and reliable.
Description
Technical field
The invention belongs to petrochemistry technical field, it is related to drag reducer additional amount in a kind of offshore oil and gas field gathering line
Evaluation method.
Background technique
The many crude oil characteristics in China have the characteristics that three is high, i.e., paraffin content is high, gum level is high, asphalt content
Height, apparent viscosity is big when low temperature, poor fluidity, line pressure are high, the defeated difficulty of pipe, and offshore oilfield does not have the long defeated pipe in land oil field
The process conditions heated along road, offshore oilfield generally use the gathering line for having insulating layer, but in long range gathering line
Temperature drop is still very big, and main harm is shown, if keeping gathering line Crude Oil Transportation amount constant, the pressure in gathering line is just
It can increase, will lead to oil well has the risk shut down, and how to improve the conveying capacity of offshore oilfield gathering line or keeps crude oil
The pressure that gathering line is reduced in the case that conveying capacity is constant becomes a pass of many Crude Oil at Sea exploitation company release production capacity
Key and outstanding problem.Drag reducer for crude oil can be obviously improved the low temperature flow of crude oil, significantly reduce the defeated resistance of pipe of crude oil, drag reduction
Efficiency is very high, it can be achieved that annual room temperature oil transportation, to save fuel and power consumption, economic benefit is considerable.
The conveying crude oil amount that the general evaluation method of marine gathering line drag reducer is to maintain pipeline is certain, observes pipeline two
The variation of end pressure illustrates that drag reducer plays the role of crude oil drag reducing if pipeline pressure at two ends reduces, but the original of gathering line
It is quantitative that oily conveying capacity not all keeps one all the time, but fluctuates within the scope of some, this results in petroleum pipeline both ends
Pressure there are certain fluctuation, with good grounds petroleum pipeline pressure at two ends variation judge that the effect of drag reducer is not fully quasi-
Really.
Summary of the invention
The technical problems to be solved by the invention provide a kind of commenting for drag reducer additional amount in offshore oil and gas field gathering line
Valence method.The present invention is the matter of residual crude oil in end pressure situation of change and the receiving end experiment of falling cup of being set out according to gathering line
For amount situation of change in conjunction with come the method for evaluating drag reducer, method is simple to operation, and obtained experimental data is more acurrate reliable.
To solve the above problems, the present invention adopts the following technical scheme:
The evaluation method of drag reducer additional amount in offshore oil and gas field gathering line, comprising the following steps:
1) when drag reducer is not added in gathering line head end, the pressure of gathering line head end is recorded, K is denoted as1, while
Gathering line end, acquisition oil sample carry out the experiment of falling cup, record the residual mass of cup Crude Oil, be denoted as M1；
2) drag reducer is added in gathering line head end, the initial filling concentration of drag reducer is X1, after a period of time, note
The pressure for recording gathering line head end, is denoted as K2, and judge K2And K1Difference, while in gathering line end, it acquires oil sample and is fallen
Cup experiment, records the residual mass of cup Crude Oil, is denoted as M2；
3) if the difference of K2 and K1 is greater than 30kPa or M2And M1Difference when being greater than 0.5g, then continue growing drag reducer plus
Enter amount, is X by the filling concentration of drag reducer2, after a period of time, the pressure of gathering line head end is recorded, K is denoted as3, while
Gathering line end, acquisition oil sample carry out the experiment of falling cup, record the residual mass of cup Crude Oil, be denoted as M3, then judge K3And K2
Difference, M3And M2Difference；If K2And K1Difference be greater than 30kPa or M2And M1Difference be greater than 0.5g illustrate drug concentration
Increase, resistance of the crude oil in pipeline also continues reduced space, and medicament implantation concentration has not been reached yet most preferably；
If 4) K3And K2Difference be greater than 30kPa or M3And M2Difference when being greater than 0.5g, then continue growing drag reducer plus
Enter amount, is X by the filling concentration of drag reducer3, after a period of time, the pressure of gathering line head end is recorded, K is denoted as4, while
Gathering line end, acquisition oil sample carry out the experiment of falling cup, record the residual mass of cup Crude Oil, be denoted as M4, then judge K4And K3
Difference, M4And M3Difference；
5) it is recycled according to above-mentioned steps, until KnAnd Kn-1Difference be less than or equal to 30kPa and MnAnd Mn-1Difference be less than etc.
When 0.5g, stop the filling concentration for increasing drag reducer, remembers the best filling concentration that concentration at this time is added for drag reducer.Mainly
Economically consider, if the difference of Kn and Kn-1 is less than or equal to 30kPa and the difference of Mn and Mn-1 is less than or equal to 0.5g, says
The bright concentration for continuing growing medicament, resistance of the crude oil in pipeline reduce amplitude and reduce, and pharmacy effect is substantially achieved maximum at this time
Performance, if be further continued for increase medicament filling concentration, on the one hand will increase economic cost, another aspect drag reducer dosage is excessive
Side effect may be generated to the crude Treatment in later period.
As further improvement of the invention, the experiment of falling cup are as follows: first weigh clean beaker, record the first prothyl of beaker
Measure L1, the fresh crude oil that gathering line end takes then is added, stands 5 minutes, then beaker is turned around, crude oil outflow is allowed to burn
Cup, puts beaker just, then weigh the beaker with part crude oil again after five minutes, records the quality L of beaker2, then remaining in beaker
The weight of crude oil is L3=L2-L1。
As further improvement of the invention, the experiment of falling cup are as follows: first the capacity of beaker is referred to as 500mL, gathering line
End takes the fresh crude oil of 200g.
As further improvement of the invention, the input mode of the drag reducer are as follows: prepare pharmacy jar in head end platform, and
Drag reducer is injected in pharmacy jar, medicament injection pump is opened, drag reducer is pumped into gathering line head end from pharmacy jar.
As further improvement of the invention, the concentration that is initially added of the drag reducer is 20ppm, later increased every time
Filling concentration is 5ppm.
It is improved as of the invention further, it is described every referring to adjusting the after concentration is added in drag reducer for a period of time
12 hours and/or 18 hours, carry out 1 time or 2 times record.
As further improvement of the invention, it is 24 hours that the drag reducer, which adjusts the time interval of concentration is added every time,.
As further improvement of the invention, the distance between described defeated pipe end of gathering line head end sum aggregate is 5 public
In.
As further improvement of the invention, the gathering line head end temperature is 65 DEG C, and terminal temperature is 30 DEG C.
As further improvement of the invention, each adjustment time of drag reducer is daily 0:00.
Inventive principle: drag reducer for crude oil can be obviously improved the low temperature flow of crude oil, significantly reduce the defeated resistance of pipe of crude oil,
The common evaluation method of marine gathering line drag reducer is the variation observed crude oil gathering pipelines and receive end pressure, if collector and delivery pipe
Line pressure at two ends reduces, and illustrates that drag reducer plays the role of crude oil drag reducing, but in the actual production process of oil field, the oil production of oil well
Be it is continually changing, it is quantitative not all to keep one all the time for crude oil gathering pipelines conveying capacity in other words, but in some model
Interior fluctuation is enclosed, this results in the pressure at petroleum pipeline both ends, and there are certain fluctuations, so according only to petroleum pipeline pressure at two ends
Variation judges that the effect of drag reducer is inaccurate.This patent provide it is a kind of according to gathering line set out end pressure situation of change and
The method that the quality change situation of residual crude oil combines in the experiment of falling cup of receiving end evaluates the effect of drag reducer, if drag reduction
The effect of agent is good, and the frictional force of crude oil and gathering line inner wall will reduce, and macro manifestations are the reduction of gathering line pressure at two ends,
In addition the frictional force of crude oil and beaker inner wall can also reduce, and the mobility of crude oil improves, so remaining in beaker after cup
Crude quality will be fewer, and the effect for further relating to drag reducer is better.The two, which combines, more effectively can accurately evaluate drag reducer
Effect.
Beneficial effect
The additional amount of most suitable drag reducer may be implemented in method of the invention, not only drag reducer is enable to be obviously improved crude oil
Low temperature flow, significantly reduce the defeated resistance of pipe of crude oil, drag reduction efficiency is very high, saves fuel and power consumption, can also have
The cost of effect control drag reducer, so that economic benefit is considerable.
It is provided by the invention set out according to gathering line it is remaining former in end pressure situation of change and the receiving end experiment of falling cup
The quality change situation of oil is come the method for evaluating drag reducer, and evaluation method is simple to operation, and especially the experimental method of falling cup is not managed
Line conveys the amount of crude oil and the influence of pipeline pressure at two ends, and obtained experimental data is more acurrate reliable.
Detailed description of the invention
Fig. 1 uses schematic diagram for offshore oil and gas field gathering line addition drag reducer of the invention；
Wherein, 1-drag reducer filling point；2-pressure acquisition points；3-crude oil collection points；4-end's platforms；5-collection are defeated
Pipeline；6-head end platforms.
Specific embodiment
The invention will be further elucidated with reference to specific embodiments.It should be understood that these embodiments are merely to illustrate this hair
It is bright rather than limit the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, art technology
Personnel can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Fixed range.
Embodiment 1
The evaluation method of drag reducer additional amount in offshore oil and gas field gathering line, comprising the following steps:
1) when drag reducer is not added in gathering line head end, the pressure of gathering line head end is recorded, K is denoted as1, while
Gathering line end, acquisition oil sample carry out the experiment of falling cup, record the residual mass of cup Crude Oil, be denoted as M1；
2) drag reducer is added in gathering line head end, the initial filling concentration of drag reducer is X1, after a period of time, note
The pressure for recording gathering line head end, is denoted as K2, and judge K2And K1Difference, while in gathering line end, it acquires oil sample and is fallen
Cup experiment, records the residual mass of cup Crude Oil, is denoted as M2；
If 3) K2And K1Difference be greater than 30kPa or M2And M1Difference when being greater than 0.5g, then continue growing drag reducer plus
Enter amount, is X by the filling concentration of drag reducer2, after a period of time, the pressure of gathering line head end is recorded, K is denoted as3, while
Gathering line end, acquisition oil sample carry out the experiment of falling cup, record the residual mass of cup Crude Oil, be denoted as M3, then judge K3And K2
Difference, M3And M2Difference；
If 4) K3And K2Difference be greater than 30kPa or M3And M2Difference when being greater than 0.5g, then continue growing drag reducer plus
Enter amount, is X by the filling concentration of drag reducer3, after a period of time, the pressure of gathering line head end is recorded, K is denoted as4, while
Gathering line end, acquisition oil sample carry out the experiment of falling cup, record the residual mass of cup Crude Oil, be denoted as M4, then judge K4And K3
Difference, M4And M3Difference；
5) it is recycled according to above-mentioned steps, until KnAnd Kn-1Difference be less than or equal to 30kPa and MnAnd Mn-1Difference be less than etc.
When 0.5g, stop the filling concentration for increasing drag reducer, remembers the best filling concentration that concentration at this time is added for drag reducer.
The experiment of falling cup are as follows: the capacity for first weighing beaker is the clean beaker of 500mL, records the initial mass L of beaker1, so
The fresh crude oil that gathering line end takes 200g is added afterwards, stands 5 minutes, then beaker is turned around, crude oil outflow is allowed to burn
Cup, puts beaker just, then weigh the beaker with part crude oil again after five minutes, records the quality L of beaker2, then remaining in beaker
The weight of crude oil is L3=L2-L1。
Specifically: 6 crude oil wax of South Sea oil field head end platform, colloid, asphalt content are high, 5 head end temperature of gathering line
It is 65 DEG C, terminal temperature is 30 DEG C, and 5 both ends temperature drop of gathering line is obvious, and viscosity of crude is big, is unfavorable for conveying, and gathering line 5 is pressed
Power is high, 6 crude oil exporting of head end platform to end's platform 4, and the distance between two platforms are 5 kilometers, and crude oil is in gathering line 5
Residence time be about 1 hour, gathering line go out start 2 pressure in 1900kPa or so, if 5 head end pressure of gathering line is adopted
The characteristics of pressure of collection point 2 is higher than 2000kPa, and 6 oil well of head end platform has the risk shut down, and produces liquid for the platform, using subtracting
Resist is cost-effective means.The application of drag reducer includes the following steps with evaluation method, prepares medicament in head end platform 6
Tank, and drag reducer is injected in pharmacy jar, medicament injection pump is opened, drag reducer is pumped into gathering line head end from pharmacy jar；
After injecting drag reducer, the filling concentration of daily 0:00 adjustment drag reducer, 12:00 and 18:00 acquisition 5 head end pressure of gathering line is adopted
The crude oil experimental data of falling cup of the crude oil collection point 3 of 5 end of pressure data and gathering line of collection point 2, and by data inputting
In table 1, the concentration that is initially added of drag reducer is 20ppm, and increased filling concentration is 5ppm every time later.
As can be seen from the table, when drag reducer filling concentration is 30ppm, the extra large 3 crude oil experiment of falling cup crude oil of pipe end is surplus
Surplus is between 15.1~15.3g, and 2 pressure of starting are managed out in 1680~1700kPa in sea, and the injection for being further continued for improving drag reducer is dense
After degree, the reduction amplitude of the extra large 3 crude oil experiment of falling cup crude oil residual mass of pipe end is significantly reduced, and 2 pressure of starting are managed out in sea
Change also unobvious, it is believed that 30ppm is the optimal use concentration of drag reducer.
Claims (10)
1. the evaluation method of drag reducer additional amount in offshore oil and gas field gathering line, characterized in that the following steps are included:
1) when drag reducer is not added in gathering line head end, the pressure of gathering line head end is recorded, K is denoted as1, while it is defeated collecting
Pipe end, acquisition oil sample carry out the experiment of falling cup, record the residual mass of cup Crude Oil, be denoted as M1；
2) drag reducer is added in gathering line head end, the initial filling concentration of drag reducer is X1, after a period of time, record set
The pressure of defeated pipeline head end, is denoted as K2, and judge K2And K1Difference, while in gathering line end, it acquires oil sample and carries out the reality of falling cup
It tests, records the residual mass of cup Crude Oil, be denoted as M2；
If 3) K2And K1Difference be greater than 30 kPa or M2And M1Difference be greater than 0.5g when, then continue growing the addition of drag reducer
The filling concentration of drag reducer is X by amount2, after a period of time, the pressure of gathering line head end is recorded, K is denoted as3, while collecting
Defeated pipe end, acquisition oil sample carry out the experiment of falling cup, record the residual mass of cup Crude Oil, be denoted as M3, then judge K3And K2Difference
Value, M3And M2Difference；
If 4) K3And K2Difference be greater than 30 kPa or M3And M2Difference be greater than 0.5g when, then continue growing the addition of drag reducer
The filling concentration of drag reducer is X by amount3, after a period of time, the pressure of gathering line head end is recorded, K is denoted as4, while collecting
Defeated pipe end, acquisition oil sample carry out the experiment of falling cup, record the residual mass of cup Crude Oil, be denoted as M4, then judge K4And K3Difference
Value, M4And M3Difference；
5) it is recycled according to above-mentioned steps, until KnAnd Kn-1Difference be less than or equal to 30 kPa and MnAnd Mn-1Difference be less than or equal to
When 0.5g, stop the filling concentration for increasing drag reducer, remembers the best filling concentration that concentration at this time is added for drag reducer.
2. the evaluation method of drag reducer additional amount in offshore oil and gas field gathering line according to claim 1, characterized in that
The experiment of falling cup are as follows: first weigh clean beaker, record the initial mass L of beaker1, then addition gathering line end takes new
Fresh crude oil stands 5 minutes, then beaker is turned around, allows crude oil to flow out beaker, beaker is put just again after five minutes, then weigh band
There is the beaker of part crude oil, records the quality L of beaker2,Then the weight of residual crude oil is L in beaker3= L2-L1。
3. the evaluation method of drag reducer additional amount in offshore oil and gas field gathering line according to claim 2, characterized in that
The experiment of falling cup are as follows: first the capacity of beaker is referred to as 500mL, and gathering line end takes the fresh crude oil of 200g.
4. the evaluation method of drag reducer additional amount in offshore oil and gas field gathering line according to claim 1, characterized in that
The input mode of the drag reducer are as follows: prepare pharmacy jar in head end platform, and drag reducer is injected in pharmacy jar, open medicament note
Enter pump, drag reducer is pumped into gathering line head end from pharmacy jar.
5. the evaluation method of drag reducer additional amount in offshore oil and gas field gathering line according to claim 1, characterized in that
The concentration that is initially added of the drag reducer is 20ppm, and increased filling concentration is 5ppm every time later.
6. the evaluation method of drag reducer additional amount in offshore oil and gas field gathering line according to claim 1, characterized in that
It is described every refer to for a period of time drag reducer adjust be added concentration after the 12nd hour and/or 18 hours, carry out 1 time or 2 times
Record.
7. the evaluation method of drag reducer additional amount in offshore oil and gas field gathering line according to claim 6, characterized in that
It is 24 hours that the drag reducer, which adjusts the time interval of concentration is added every time,.
8. the evaluation method of drag reducer additional amount in offshore oil and gas field gathering line according to claim 1, characterized in that
The distance between described defeated pipe end of gathering line head end sum aggregate is 5 kilometers.
9. the evaluation method of drag reducer additional amount in offshore oil and gas field gathering line according to claim 1, characterized in that
The gathering line head end temperature is 65 DEG C, and terminal temperature is 30 DEG C.
10. the evaluation method of drag reducer additional amount, feature in offshore oil and gas field gathering line according to claim 7
It is that each adjustment time of drag reducer is daily 0:00.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811593942.XA CN109632574A (en) | 2018-12-25 | 2018-12-25 | The evaluation method of drag reducer additional amount in offshore oil and gas field gathering line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811593942.XA CN109632574A (en) | 2018-12-25 | 2018-12-25 | The evaluation method of drag reducer additional amount in offshore oil and gas field gathering line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109632574A true CN109632574A (en) | 2019-04-16 |
Family
ID=66077515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811593942.XA Pending CN109632574A (en) | 2018-12-25 | 2018-12-25 | The evaluation method of drag reducer additional amount in offshore oil and gas field gathering line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109632574A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080289435A1 (en) * | 2007-05-22 | 2008-11-27 | M-I Llc | Device for evaluating drag reduction |
| CN101329245A (en) * | 2007-06-22 | 2008-12-24 | 中国人民解放军军事医学科学院野战输血研究所 | Liquid line flow resistance force detection device and method for detecting drag reduction effect of drag reducer |
| CN101696925A (en) * | 2009-10-23 | 2010-04-21 | 西安交通大学 | Device and method for testing performance of two-phase flow drag reducer |
| CN202119760U (en) * | 2011-06-09 | 2012-01-18 | 中国石油化工股份有限公司 | Drag reducer evaluating device |
| CN103028577A (en) * | 2012-12-10 | 2013-04-10 | 天津亿利科能源科技发展股份有限公司 | Offshore oil and gas field gathering and transmission pipe descaling and evaluation method |
| CN103048243A (en) * | 2011-10-13 | 2013-04-17 | 中国石油化工股份有限公司 | Simulative friction measuring device |
| CN103115849A (en) * | 2013-01-21 | 2013-05-22 | 江苏大学 | Device for testing all-flow resistance reduction characteristic of high-molecular polymer solution |
| CN204177704U (en) * | 2014-11-03 | 2015-02-25 | 长江大学 | A kind of High Temperature High Pressure drag reducer evaluating device |
-
2018
- 2018-12-25 CN CN201811593942.XA patent/CN109632574A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080289435A1 (en) * | 2007-05-22 | 2008-11-27 | M-I Llc | Device for evaluating drag reduction |
| CN101329245A (en) * | 2007-06-22 | 2008-12-24 | 中国人民解放军军事医学科学院野战输血研究所 | Liquid line flow resistance force detection device and method for detecting drag reduction effect of drag reducer |
| CN101696925A (en) * | 2009-10-23 | 2010-04-21 | 西安交通大学 | Device and method for testing performance of two-phase flow drag reducer |
| CN202119760U (en) * | 2011-06-09 | 2012-01-18 | 中国石油化工股份有限公司 | Drag reducer evaluating device |
| CN103048243A (en) * | 2011-10-13 | 2013-04-17 | 中国石油化工股份有限公司 | Simulative friction measuring device |
| CN103028577A (en) * | 2012-12-10 | 2013-04-10 | 天津亿利科能源科技发展股份有限公司 | Offshore oil and gas field gathering and transmission pipe descaling and evaluation method |
| CN103115849A (en) * | 2013-01-21 | 2013-05-22 | 江苏大学 | Device for testing all-flow resistance reduction characteristic of high-molecular polymer solution |
| CN204177704U (en) * | 2014-11-03 | 2015-02-25 | 长江大学 | A kind of High Temperature High Pressure drag reducer evaluating device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106677750B (en) | Carbonate Reservoir vug-fracture Reservoir Body water injection indication curve interpretation model | |
| CN102562022B (en) | Process technology suitable for deep coal bed gas fracturing | |
| CN105388254B (en) | HTHP foam fracturing fluid leak-off damage experiment system | |
| CN113090236A (en) | Carbonate reservoir double-karst-cave reservoir body water injection indication curve interpretation model | |
| CN101915721B (en) | Test method for simulating variation of permeability coefficient of foundation pit precipitation | |
| CN101016835A (en) | Thermal production well filling vapor and nitrogen foam profile control technique | |
| CN103760087A (en) | Permeating device for sustainable pressurization of rock body seepage test | |
| CN109184644A (en) | A kind of early stage poly- effect evaluation method of note considering polymer non-Newtonianism and seepage flow additional drag | |
| CN203732406U (en) | Permeation device capable of continuously pressurizing and used for rock mass seepage test | |
| CN106097118A (en) | A kind of permeability saturation curve determines the method for heavy crude reservoir polymer flooding scope on opportunity | |
| CN103114830A (en) | Enriched-gas-drive water-altering-gas (WAG) injection method | |
| CN109632574A (en) | The evaluation method of drag reducer additional amount in offshore oil and gas field gathering line | |
| CN100489053C (en) | Macropore plugging gelatin | |
| CN204208512U (en) | A kind of blending device of SMB and ABB Hybrid mode | |
| CN206581211U (en) | A kind of analogue means of the determination with vegetation bank stability | |
| CN111749664B (en) | Oil field whole-course chemical flooding combined take-over opportunity optimization method and system | |
| CN104832139A (en) | Determination method for injected volume of carbon dioxide during huff-puff process of carbon dioxide | |
| CN110206520B (en) | Micro-fracturing augmented injection process method suitable for offshore oilfield water injection well | |
| CN204789227U (en) | Anhydrous fracturing fluid loss property testing arrangement of carbon dioxide | |
| CN104675372B (en) | A kind of method for injecting produced quantity distribution for polymer flooding | |
| CN102435463B (en) | Online acquisition system and method for catalyst slurry | |
| CN104560081B (en) | Method for producing needle coke by kettle type coking | |
| CN107387105B (en) | Soil pressure shield bentonite pressure maintaining equipment and method | |
| CN105625992A (en) | Reasonable liquid extracting method specific to roof ridge fault block oil reservoir | |
| CN208252088U (en) | A kind of dropping system preventing oil well paraffinication |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20211029 |
|
| AD01 | Patent right deemed abandoned |