CN104929568B - A kind of construction method for gas reservoir control water - Google Patents
A kind of construction method for gas reservoir control water Download PDFInfo
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- CN104929568B CN104929568B CN201510226350.4A CN201510226350A CN104929568B CN 104929568 B CN104929568 B CN 104929568B CN 201510226350 A CN201510226350 A CN 201510226350A CN 104929568 B CN104929568 B CN 104929568B
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Abstract
The invention discloses a kind of construction method for gas reservoir control water, comprise the following steps：Gas is injected into gas reservoir, the encroached water in gas-bearing formation is pushed into remote well；Gel of the configuration with delay crosslinking ability, and gel is subjected to atomization process, to form gas phase dispersion gel；Gas phase dispersion gel and gas companion are noted into gas reservoir；Continue to inject gas, to realize migration of the gel in gas-bearing formation with disperseing；Carry out stewing well processing.The construction method for gas reservoir control water of the present invention can realize that Gelling Plugging Agent is atomized, and significantly reduce injection pressure, be adapted to middle low permeability gas reservoirs；Leading portion injection atomization Gelling Plugging Agent, is subsequently implanted into gas, can realize blocking agent deep water blockoff；Xie Shuisuo can be realized, can also realize that the later stage controls water, increase the term of validity；Long-term control water can be realized, the term of validity is more than half a year.
Description
Technical field
The present invention relates to a kind of construction method for gas reservoir control water, the gas reservoir that is particularly suitable for use in, gas condensate reservoir high water-cut well
Help lie and reproduce and control aquatic production.
Background technology
For natural gas as a kind of more cleaning, more high-quality, the more economical energy, the status in national economy is increasingly heavier
Will.China's gas reservoir is broadly divided into low permeability gas reservoir, gas condensate reservoir and edge-bottom water gas reservoir.At present, China's gas reservoir, gas condensate reservoir are most
Developed using exhaustion formula, altered by edge-bottom water into being influenceed, lain caused by liquid lock well number and High water cut caused by the aqueous rising of gas well
Jing Jing numbers are increasing, and pressure, yield constantly decline even stop-spraying, have had a strong impact on the Efficient Development of gas reservoir.
At present, harness the river, water control technique mainly has curable particulate species closure to abandon water logging section, polymerization species partial selective
Water blockoff, natural gas injection or nitrogen such as reproduce at the technology, but scale is ripe, adaptable technology still without being formed.It is comprehensive
Think, the subject matter for causing early stage water blockoff, control water effect poorly efficient has：1) blocking agent system bad adaptability, gas well is in water, gas
Two-phase, blocking agent poor selectivity, easily air water are the same as stifled；2) gas reservoir formation sensitivity is strong, is polluted by the external liquid of uncured liquid blocking agent
Gas-bearing formation water is caused to be locked；3) process matching Technological adaptability is poor.
Wherein, Publication No. CN101397896A Chinese invention patent application " puts cement cooperation gas injection pressurization using inclining
Following shutoff method is disclosed in the shutoff method of closing Gas well dewatering section "：Gas injection is implemented to target well, well internal water accumulation is pushed away
Stratum is gone back to, makes to keep anhydrous state in well, while this gas injection, declines to incline using cable and puts device, make its lowering into stratum
The section to be closed, when reaching closing section, control, which is inclined, puts the unlatching of device bottom end opening, flows out built-in laitance, laitance
Outflow is first gathered in closing section, and laitance slowly flows into the gravel layer in annular distance between screen casing and the borehole wall, and it is straight to continue gas injection
To laitance consolidation and sclerosis, reach the purpose of Plugging Water Zones.But aforesaid way can not realize deep water blockoff, be only applicable to gas-bearing formation
Thickness is big or presss from both sides the gas reservoir of interlayer development, and otherwise easy stratum water, which streams, causes water blockoff to fail.
Therefore, the gas reservoir, gas condensate reservoir water blockoff, control hydraulic art of research and development wide adaptability are needed badly, improves such gas reservoir, condensate gas
Hide the development effectiveness of development late stage high water cut stage.
The content of the invention
It is an object of the invention to provide one kind can effectively block water stream channel, realize that the High water cut of gas condensate reservoir is administered
Construction method.
To achieve the above object, a kind of concrete technical scheme of construction method for gas reservoir control water of the invention is：
A kind of construction method for gas reservoir control water, comprise the following steps：Gas is injected into gas reservoir, by gas-bearing formation
Encroached water is pushed into remote well；Gel of the configuration with delay crosslinking ability, and gel is subjected to atomization process, to form gas phase dispersion
Gel；Gas phase dispersion gel and gas companion are noted into gas reservoir；Continue inject gas, with realize migration of the gel in gas-bearing formation with
It is scattered；Carry out stewing well processing.
The construction method for gas reservoir control water of the present invention has advantages below：
1) it can realize that Gelling Plugging Agent is atomized, significantly reduce injection pressure, be adapted to middle low permeability gas reservoirs；
2) leading portion injection atomization Gelling Plugging Agent, is subsequently implanted into gas, can realize blocking agent deep water blockoff；
3) Xie Shuisuo can be realized, can also realize that the later stage controls water, increase the term of validity；
4) long-term control water can be realized, the term of validity is more than half a year.
Brief description of the drawings
Fig. 1 is the working sketch for gas reservoir control water of the present invention.
Description of reference numerals：1 nitrogen injection unit；2 gas phase ball-and-seats；3 supersonic atomizers；4 liquid phase ball-and-seats；5 notes
Liquid pump；6 christmas tree oil pipe four-ways；7 four-way junction of casing；8 gas well sleeve pipes；9 gas well oil pipes；10 gas-bearing formations；11 gel particles；12 gas-bearing formation water
Invade region.
Embodiment
In order to be better understood by the purpose of the present invention, structure and function, below in conjunction with the accompanying drawings, one kind of the present invention is used for
The construction method of gas reservoir control water does further detailed description.
As shown in figure 1, the construction method for gas reservoir control water of the present invention comprises the following steps：
First, gas is injected into gas reservoir, the encroached water in gas-bearing formation 10 is pushed into remote well.Wherein, the gas of injection is excellent
Elect nitrogen as, and the injection rate of nitrogen is more than 1.5 times of gas well highest hourly output, the amount for injecting nitrogen is 30~400,000
m3。
Secondly, gel of the configuration with delay crosslinking ability, and gel is subjected to atomization process, coagulated with forming gas phase dispersion
Glue.Wherein, gel is preferably the polyacrylamide gel with delay crosslinking ability, and atomization process preferably uses ultrasonic atomization
Device, and the power of supersonic atomizer typically wants ＞ 50kw.
Then, gas phase dispersion gel and gas companion are noted into gas reservoir.Wherein, gel injection rate be preferably 0.3~
0.5m3/ h, gel injection rate are typically designed as 50~80m3.In addition, the injection timing of gel is preferably breakthrough of gas gas-bearing formation water enchroachment (invasion)
Region 12, after gas injection pressure is decreased obviously.
Then, continue to inject gas, to realize migration of the gel in gas-bearing formation 10 with disperseing.
Finally, stewing well processing is carried out.
When gas well resumes production again, you can effectively block advancing by leaps and bounds again for edge-bottom water, realize the deep of gas well
Water blockoff, control water.
The construction method construction is simple for gas reservoir control water of the present invention, it is applicable to the High water cut of gas reservoir, gas condensate reservoir
Administer, disclosure satisfy that clastic rock gas reservoir, gas condensate reservoir High water cut gas well gas injection reproduce, controlled the demand of aquatic production.
Application example 1
Certain SL-1 condensate gas well, well depth 5289.7m, perforated interval 5026-5042m, positioned at gas reservoir high-order bit, history is most
The high side of hourly output 1000.In April, 2014 is aqueous to rise to 95%, and daily gas is less than 1000 sides.
Start nitrogen injection+gas phase dispersion gel water-plugging control water in July, 2014 to construct, 1800 sides of nitrogen injection rate/hour,
After injecting the side of nitrogen 1.3 ten thousand, gas injection pressure is down to 35MPa by 50MPa, then with gas injection phase dispersion gel, injection rate 0.5
Side/hour, ultrasonic unit power 55kw, the side of injection rate gel 60, with injection nitrogen after gas injection phase gel, is continued, add up note
Enter the side of nitrogen 300,000.
In August, 2014 drives a well, aqueous to be down to 66%, adds up to increase the side of gas 2,700,000, is valid up to more than 8 months.
Application example 2
Certain SL-2 condensate gas well, well depth 4320.50m, 4495.2-4695.17m cutting seam sieve tube completion, positioned at the high portion of gas reservoir
Position, the side of historical high hourly output 960.In April, 2010 is aqueous to rise to more than 95%, and the gas production that drives a well is few.
Start nitrogen injection+gas phase dispersion gel water-plugging control water within 2 months 2014 to construct, 1500 sides of nitrogen injection rate/hour,
After injecting the side of nitrogen 50,000, gas injection pressure is down to 33MPa by 38MPa, then companion's gas injection phase dispersion gel, and the side of injection rate 0.5/
Hour, ultrasonic unit power 50kw, the side of injection rate gel 70, with injection nitrogen after gas injection phase gel, is continued, add up injection nitrogen
The side of gas 400,000.
In April, 2014 drives a well, aqueous to be down to 70%, adds up to increase the side of gas 1,800,000, is valid up to 10 months.
The present invention makes shake gels or colloidal dispersed gel shape that polymer is lightly crosslinked by adding nitrogen in gel
Into gas phase dispersion system, for gas reservoir water blockoff, the choice of technology is good, injury is low, is suitable for gas reservoir water blockoff, control water, contributes to
The upper production of China's gas reservoir gas production, stable yields, are favorably improved economic benefit, can be that gas reservoir harness the river, control water and open up new way
Footpath, technical support is provided to carry gas reservoir ultimate recovery.
The present invention is further described by specific embodiment above, it should be understood that, here specifically
Description, should not be construed as the restriction to the spirit and scope of the invention, and one of ordinary skilled in the art is reading this explanation
The various modifications made after book to above-described embodiment, belong to the scope that the present invention is protected.
Claims (7)
1. a kind of construction method for gas reservoir control water, it is characterised in that comprise the following steps：
Gas is injected into gas reservoir, the encroached water in gas-bearing formation is pushed into remote well；
Gel of the configuration with delay crosslinking ability, and gel is subjected to atomization process, to form gas phase dispersion gel；
Gas phase dispersion gel and gas companion are noted into gas reservoir；
Continue to inject gas, to realize migration of the gel in gas-bearing formation with disperseing；
Carry out stewing well processing.
2. the construction method according to claim 1 for gas reservoir control water, it is characterised in that the gas injected into gas reservoir
For nitrogen.
3. the construction method according to claim 2 for gas reservoir control water, it is characterised in that gas is injected into gas reservoir
Injection rate is more than 1.5 times of gas well highest hourly output, and the amount for injecting gas is 30~400,000 m3。
4. the construction method according to claim 1 for gas reservoir control water, it is characterised in that gel is to be crosslinked with delay
The polyacrylamide gel of ability.
5. the construction method according to claim 4 for gas reservoir control water, it is characterised in that the atomization process of gel uses
Supersonic atomizer, and the power of supersonic atomizer wants ＞ 50kw.
6. the construction method according to claim 1 for gas reservoir control water, it is characterised in that the injection timing of gel is gas
Body breaks through gas-bearing formation water enchroachment (invasion) region, after gas injection pressure is decreased obviously.
7. the construction method according to claim 6 for gas reservoir control water, it is characterised in that the injection rate of gel is
0.3~0.5m3/ h, injection rate are 50~80m3。
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| CN201510226350.4A CN104929568B (en) | 2015-05-06 | 2015-05-06 | A kind of construction method for gas reservoir control water |
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| CN201510226350.4A CN104929568B (en) | 2015-05-06 | 2015-05-06 | A kind of construction method for gas reservoir control water |
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| CN104929568A CN104929568A (en) | 2015-09-23 |
| CN104929568B true CN104929568B (en) | 2018-02-23 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105525890B (en) * | 2015-11-24 | 2019-01-08 | 中国石油化工股份有限公司 | Method for sieve tube completion water plugging of horizontal well |
| CN108643873A (en) * | 2018-05-09 | 2018-10-12 | 重庆科技学院 | One kind after well well workover of calming the anger for reproducing method |
| CN109826601B (en) * | 2019-02-27 | 2020-06-30 | 成都理工大学 | Water lock removing method for tight reservoir |
| CN115059430B (en) * | 2022-07-08 | 2024-01-23 | 中海石油(中国)有限公司 | Selective cone pressing water plugging method for oil well of side bottom water reservoir |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101033392A (en) * | 2007-03-30 | 2007-09-12 | 盘锦市庆联油田工程技术服务有限公司 | Expansion type flow gel profile controlling water shutoff agent |
| CN101397896A (en) * | 2007-09-30 | 2009-04-01 | 台湾中油股份有限公司 | Water-shutoff method for sealing gas well effluent section by combination of incline cement and gas injection compression |
| CN101798500A (en) * | 2010-04-01 | 2010-08-11 | 中国石油大学(华东) | Plugging agent with double plugging function and filling method thereof |
| CN104087280A (en) * | 2014-07-10 | 2014-10-08 | 中国石油大学(华东) | Blocking system and blocking method for channeling inhibition in carbon dioxide non-miscible flooding of low permeability reservoir |
-
2015
- 2015-05-06 CN CN201510226350.4A patent/CN104929568B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101033392A (en) * | 2007-03-30 | 2007-09-12 | 盘锦市庆联油田工程技术服务有限公司 | Expansion type flow gel profile controlling water shutoff agent |
| CN101397896A (en) * | 2007-09-30 | 2009-04-01 | 台湾中油股份有限公司 | Water-shutoff method for sealing gas well effluent section by combination of incline cement and gas injection compression |
| CN101798500A (en) * | 2010-04-01 | 2010-08-11 | 中国石油大学(华东) | Plugging agent with double plugging function and filling method thereof |
| CN104087280A (en) * | 2014-07-10 | 2014-10-08 | 中国石油大学(华东) | Blocking system and blocking method for channeling inhibition in carbon dioxide non-miscible flooding of low permeability reservoir |
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