CN104863553B - One kind releases gas well water lock new method - Google Patents
One kind releases gas well water lock new method Download PDFInfo
- Publication number
- CN104863553B CN104863553B CN201510194748.4A CN201510194748A CN104863553B CN 104863553 B CN104863553 B CN 104863553B CN 201510194748 A CN201510194748 A CN 201510194748A CN 104863553 B CN104863553 B CN 104863553B
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- Prior art keywords
- well
- prepad fluid
- gas
- carbon dioxide
- water
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Classifications
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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
- 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
- E21B43/164—Injecting CO2 or carbonated water
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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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Cleaning Or Drying Semiconductors (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The present invention provides a kind of gas well water that releases and locks new method.This method specifically includes the following steps：(1) 50 100m, are used first3Prepad fluid well-flushing, untill well head output water is basically identical with injection prepad fluid color；(2), with the remaining prepad fluid of enough liquid carbon dioxide gaslifts, the remaining prepad fluid in most of shaft bottom is enumerated, untill gas occurs in well head；(3) portion of residual prepad fluid, is headed into stratum with carbon dioxide, CO_2 stimulation is carried out, well is boiled in a covered pot over a slow fire 23 days；(4), drive a well induced flow, starts production when well head pressure reaches 4 5Mpa；Above-mentioned injection pressure is maintained at 8~12Mpa.The present invention effectively can be released gas well water lock, and the gas well after solution water removal lock averagely increases day by day gas 15000m3。
Description
Technical field
Casing-head gas well recovery technical field is improved the present invention relates to one kind, and in particular to one kind releases the new side of gas well water lock
Method.
Background technology
In hypotonic, low pressure gas reservoir production process, the main cause for producing water blocking damage has at following 2 points：(1) extraneous current
When body is contacted with reservoir, if external aqueous phase intrusion reservoir pore, can form aqueous phase blocking in duct around the borehole wall, produce
Water blocking damage.(2) after gas well yield is less than critical liquid carry over, hydrops can be formed in gas well shaft bottom.Shaft bottom hydrops is then in pit shaft
Under back pressure, micropore capillary pressure and the effect of reservoir rock wetability, microcapillary duct that can be into low permeability reservoir is produced
Reverse imbibition, so as to cause stratum water blocking damage.
The content of the invention：
In order to solve technical problem present in background technology, the present invention proposes that a kind of gas well water that releases locks new method, this
Invention effectively can be released gas well water lock, and the gas well after solution water removal lock averagely increases day by day gas 15000m3。
The technical scheme is that：Releasing gas well water lock new method specifically includes the following steps：(1), use first
50-100m3Prepad fluid well-flushing, untill well head output water is basically identical with injection prepad fluid color；(2), with enough liquid
State carbon dioxide gaslift remnants prepad fluids, the remaining prepad fluid in most of shaft bottom are enumerated, untill gas occurs in well head；
(3) portion of residual prepad fluid, is headed into stratum with carbon dioxide, CO_2 stimulation is carried out, well is boiled in a covered pot over a slow fire 2-3 days；(4), drive a well
Induced flow, starts production when well head pressure reaches 4-5Mpa；Above-mentioned injection pressure is maintained at 8~12Mpa.
The composition of prepad fluid in such scheme is：Each component is by mass percentage：2% modified imidazoline, 1% chlorination
The water of potassium or sal-ammoniac, 5% methanol and surplus.
The present invention has the advantages that：Gas well water lock is released by the method for the present invention, can be effective
Gas well water lock is released, the gas well after gas well solution water removal lock averagely increases day by day gas 15000m3。
Embodiment：
The invention will be further described below：
Releasing gas well water lock new method specifically includes the following steps：(1) 50-100m, is used first3Prepad fluid well-flushing, directly
Untill well head output water is basically identical with injection prepad fluid color, by observing well head output water and injection prepad fluid color base
This is consistent, and output water is that prepad fluid now illustrates well by wash clean；(2) it is and then residual with enough liquid carbon dioxide gaslifts
Remaining prepad fluid, the remaining prepad fluid in most of shaft bottom is enumerated, untill gas occurs in well head, illustrates that most of prepad fluid is lifted
Go out；(3) remaining prepad fluid, is headed into stratum with carbon dioxide, CO_2 stimulation is carried out, well is boiled in a covered pot over a slow fire 2-3 days；(4), drive a well and lure
Carbon dioxide is sprayed, starts production when well head pressure reaches 4-5Mpa；If gas production substantially increases, construction terminates, if
Not substantially, then need to reinject carbon dioxide, carry out secondary construction of handling up, above-mentioned injection pressure is maintained at 8~12Mpa.
The determination of the total consumption V of liquid carbon dioxide used in such scheme：By selected measure radius a and b, empirical coefficient
Pv, oil reservoir porosity φ, core intersection h are calculated, calculation formula：V=Pv π ab φ H, wherein empirical coefficient Pv are 0.2-0.3.
The composition of prepad fluid is in such scheme：Each component is by mass percentage：2% modified imidazoline, 1% potassium chloride
Or the water of sal-ammoniac, 5% methanol and surplus.Prepad fluid have it is nontoxic, do not injure the characteristics such as stratum.Modified imidazoline is used as
Corrosion inhibiter, which is primarily served, prevents the effect of carbon dioxide corrosion tube wall；Potassium chloride or sal-ammoniac are used as expansion-resisting agent to be primarily served
Prevent the effect of clay swell；Methanol plays a part of antifreeze, Xie Shuisuo.
Modified imidazoline in such scheme is corrosion inhibiter HGY-T either in 1- (2- aminoethyls) -2- 15 of synthesis
On the basis of alkyl imidazoline (A), it is modified using thiosemicarbazide a kind of obtained 1- (2- amino-thioureas ethyl)-
2- pentadecyls imidazoline (B) corrosion inhibiter, has the imidazoline corrosion inhibitor of corrosion inhibition to carbon dioxide in the present invention
Using.
Application example：QI105 wells inject 50m3Output water and injection prepad fluid color are basically identical after prepad fluid, gas well quilt
After cleaning, then add up 38 tons of liquid carbon dioxide of injection, well head averagely injects pressure and is maintained at 10MPa or so, stewing well is opened after 3 days
Well induced flow is produced, and averagely increase day by day gas 15000m3。
Claims (1)
1. one kind releases gas well water lock new method, this method specifically includes the following steps：(1) 50-100m, is used first3Prepad fluid
Well-flushing, untill well head output water is basically identical with injection prepad fluid color；(2), with enough liquid carbon dioxide gaslifts
Remaining prepad fluid, the remaining prepad fluid in most of shaft bottom is enumerated, untill gas occurs in well head；(3), by before portion of residual
Put liquid and stratum is headed into carbon dioxide, carry out CO_2 stimulation, boil in a covered pot over a slow fire well 2-3 days；(4), drive a well induced flow, when well head pressure reaches
Start production during to 4-5Mpa；Above-mentioned CO_2 stimulation injection pressure is maintained at 8~12Mpa；The composition of prepad fluid is：Respectively
Component is by mass percentage：The water of 2% modified imidazoline, 1% potassium chloride or sal-ammoniac, 5% methanol and surplus；The step
(2) determination of the total consumption V of liquid carbon dioxide used in：By selected measure radius a and b, empirical coefficient Pv, oil reservoir hole
Spend φ, core intersection h to calculate, calculation formula：V=Pvπ ab φ h, wherein empirical coefficient PvFor 0.2-0.3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510194748.4A CN104863553B (en) | 2015-04-23 | 2015-04-23 | One kind releases gas well water lock new method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510194748.4A CN104863553B (en) | 2015-04-23 | 2015-04-23 | One kind releases gas well water lock new method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104863553A CN104863553A (en) | 2015-08-26 |
| CN104863553B true CN104863553B (en) | 2017-08-08 |
Family
ID=53909676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510194748.4A Active CN104863553B (en) | 2015-04-23 | 2015-04-23 | One kind releases gas well water lock new method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104863553B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106968652A (en) * | 2017-03-27 | 2017-07-21 | 姚莉芳 | A kind of auxiliary carbon dioxide is handled up new method |
| CN109181669A (en) * | 2018-10-18 | 2019-01-11 | 陕西新奥石油工程有限公司 | A kind of mating medicament and technique releasing reservoir water lock, blocking |
| CN109826601B (en) * | 2019-02-27 | 2020-06-30 | 成都理工大学 | Water lock removing method for tight reservoir |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4593763A (en) * | 1984-08-20 | 1986-06-10 | Grayco Specialist Tank, Inc. | Carbon dioxide well injection method |
| US5253707A (en) * | 1992-02-12 | 1993-10-19 | Atlantic Richfield Company | Injection well fracturing method |
| CN101423755B (en) * | 2008-10-14 | 2010-12-22 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Formula of gas well water blocking damage treating agent |
| CN102020980B (en) * | 2009-09-16 | 2013-05-01 | 中国海洋石油总公司 | Composition used for preventing formation water lock and application thereof |
| CN102536165A (en) * | 2012-02-07 | 2012-07-04 | 西南石油大学 | Method and device for removing water lock damage of low-permeability densified sandstone air layer |
| CN103790552B (en) * | 2014-01-22 | 2016-03-23 | 西南石油大学 | A kind of method of the lock that dewaters for high temperature solution in oil-gas mining process |
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2015
- 2015-04-23 CN CN201510194748.4A patent/CN104863553B/en active Active
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| CN104863553A (en) | 2015-08-26 |
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Effective date of registration: 20151204 Address after: 303, B-10, room 4-8, service outsourcing industry park, 163000 Xinfeng Road, hi tech Zone, Heilongjiang, Daqing Applicant after: DAQING JINJUN PETROLEUM TECHNOLOGY DEVELOPMENT CO., LTD. Address before: 163000 No. 4-12, Gaoping District, Datong song Road, Datong District, Heilongjiang, Daqing Applicant before: Zhao Jinshu |
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