CN108119092A - A kind of watered out reservoirs fireflood producing well selectively envelope alters agent and its application - Google Patents
A kind of watered out reservoirs fireflood producing well selectively envelope alters agent and its application Download PDFInfo
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- CN108119092A CN108119092A CN201711249386.XA CN201711249386A CN108119092A CN 108119092 A CN108119092 A CN 108119092A CN 201711249386 A CN201711249386 A CN 201711249386A CN 108119092 A CN108119092 A CN 108119092A
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
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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
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/243—Combustion in situ
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- Mining & Mineral Resources (AREA)
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- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fireproofing Substances (AREA)
Abstract
The present invention provides a kind of watered out reservoirs fireflood producing well selectively envelopes to alter agent and its application, and the envelope, which alters agent, to be included：23 parts by weight of lauryl sodium sulfate；12 parts by weight of sodium oxalate；0.01 0.03 parts by weight of thickener；25 parts by weight of calcium hydroxide clear liquid.The envelope of the present invention, which alters agent, can effectively cut down harmful acid gas in stratum, carbon dioxide, hydrogen sulfide etc., can cut down the superfluous oxygen for having neither part nor lot in burning, have to seal to the predominant pathway in stratum and alter steering-effecting；Motivated, selectivity is strong；Do not pollute stratum, safety and environmental protection；Former tubing string construction, it is easy to operate.
Description
Technical field
Agent and its application are altered the present invention relates to a kind of watered out reservoirs fireflood producing well selectively envelope, in particular to one kind should
The composition altered selectively is sealed for the implementation of watered out reservoirs fireflood producing well and selectively seals the method altered using its implementation, is belonged to
Oil recovery production field.
Background technology
Situ combustion technology is also known as fireflood, is a kind of production technique that can increase substantially recovery factor of heavy oil reservoir, fireflood
Be exactly by the use of the heavy component in in-place oil as fuel, by the use of air or oxygen rich gas as combustion adjuvant, take spontaneous combustion and
The methods of manual firing, makes reservoir temperature reach crude oil burning point, and is continuously injected into combustion adjuvant, makes Crude Oil sustained combustion, burning
Reaction generates substantial amounts of heat, heated oil reservoir so that and reservoir temperature rises to 600~700 DEG C, and heavy component cracks at high temperature,
The gas of injection, the light oil of heavy oil pyrolysis generation, the gas of burning generation and water vapour are used to drive crude oil to producing well
Flowing, and produced from producing well.
Combustion in situ key technology and patented method research are concentrated mainly at present：Ignition method, completion method, tracer side
Method, monitoring method, output gas disposal, auxiliary exploitation, profile control closure, indoor simulation etc..Developed recently watered out reservoirs fire
Drive technology, but have also discovered some contradictions.Such as certain block, formation thickness 69.9m, sand thickness 33.6m, oil reservoir average effective thickness
24.5m is spent, block moisture content is up to 91%, and aqueous 90% oil well of being higher than accounts for total well number 67%, is typical watered out reservoirs.
In the case of 3000 side of initial stage injection well gas injection mark side/small, 8 mouthfuls of producing wells are shown in gas comprehensively, but only 2 mouthfuls of wells see displacement of reservoir oil effect
Fruit illustrates that has channeling passage oil saturation is relatively low, and the common selectivity envelope technology of altering cannot meet high water-cut reservoir fireflood condition
Lower production requirement.
Existing combustion in situ production well production profile adjustment blocking technology domestic at present has：Gel profile-controlling blocks, that is, uses
Polymer forms gel and aerogenesis oil reservoir is pre-processed, and is then sealed with waterglass；And with waterglass add tripoli or
Bentonite is added to realize zonal isolation；In addition, also one kind is directly to be blocked with solid particle.
These prior arts mainly include there are still many shortcomings：General closure, poor selectivity；It is released after closure
It is difficult to block；Construction cost height etc..
The carbon dioxide of output, hydrogen sulfide gas and oxygen etc. belong to pernicious gas in fireflood producing well, must be to the greatest extent
Possibly cut down.Have some envelopes alter method primarily directed to sour gas (such as：CN201510411805.X discloses one kind
White lime method for blocking in combustion in situ recovery process, etc.), but the actual demand of Oil Field can not be met.
The content of the invention
It is an object of the present invention to develop a kind of selective multiple-effect envelope to alter agent.
Another object of the present invention is to provide to alter agent implementation watered out reservoirs fireflood producing well selection using multiple-effect envelope
Property the method altered of envelope.
On the one hand, the present invention provides a kind of envelopes to alter agent composition, including：
Lauryl sodium sulfate 2-3 parts by weight；
Sodium oxalate 1-2 parts by weight；
Thickener 0.01-0.03 parts by weight；
Calcium hydroxide clear liquid (i.e. saturated calcium hydroxide aqueous solution) 2-5 parts by weight.
Specific embodiment according to the present invention, envelope of the invention are altered in agent composition, and lauryl sodium sulfate uses work
Industry product.The present invention is to its performance without particular/special requirement.
Specific embodiment according to the present invention, envelope of the invention are altered in agent composition, and the thickener is mainly used for
Stable foam, it may include polyacrylamide and/or sodium carboxymethylcellulose.When selecting polyacrylamide, preferred its molecular weight
5000000-2,000 ten thousand, 0.01-0.02 parts by weight (for lauryl sodium sulfate 2-3 parts by weight).When selection carboxymethyl
During sodium cellulosate, the preferred 0.02-0.03 parts by weight of dosage (for lauryl sodium sulfate 2-3 parts by weight).
On the other hand, the present invention also provides a kind of envelopes to alter agent, be by the envelope alter agent composition add water prepare and
Into mixed liquor.
Specific embodiment according to the present invention, the envelope, which alters agent, to be included (described to be denoted as weight percent)：
Lauryl sodium sulfate 2%-3%；
Sodium oxalate 1%-2%；
Thickener 0.01%-0.03%；
Calcium hydroxide clear liquid 2%-5%；
Water surplus.
On the other hand, the present invention also provides alter agent implementation watered out reservoirs fireflood using the envelope to have altered producing well selectivity
The method altered is sealed, this method includes：
The envelope is altered into agent injection stratum, more than general 1000 side of injection rate (amount should be The more the better, but consider economical
Reason, can bear, for the upper limit, to be normally controlled in below 10000 sides).It afterwards can closing well 1-3 days, you can opening well and making production.
Specific embodiment according to the present invention, after driving a well, detectable carbon dioxide, hydrogen sulfide, oxygen etc. are producing
It is compared before content and measure in fluid, determines measure effect.
It is that a kind of selective multiple-effect envelope alters agent that the envelope of the present invention, which alters agent, can effectively cut down harmful acid in stratum
Gas, carbon dioxide, hydrogen sulfide etc. can cut down the superfluous oxygen for having neither part nor lot in burning, there is envelope to alter the predominant pathway in stratum
Steering-effecting.
In general, beneficial effects of the present invention include：
(1) motivated, selectivity is strong.
(2) stratum, safety and environmental protection are not polluted.
(3) former tubing string construction, it is easy to operate.
Specific embodiment
Illustrate the implementation and application effect of the technology of the present invention below in conjunction with specific embodiment, but these embodiments are not intended to
It limits the scope of the invention.Not operation dated in detail, the routine operation that can refer to fields carry out in embodiment.
Embodiment：
Liaohe Oil Field well, processing well section 942.4-987.4m, effective thickness/number of plies 19.7/13, average effective porosity
21.95%.Before construction, produce 25.9 side of liquid daily, day 0.93 ton of oil-producing, aqueous 96.4%.Detect carbon dioxide in produced fluid
Content 18%, oxygen content 4.5%, hydrogen sulfide content 325ppm.Scene is with clear water by 3% lauryl sodium sulfate, 2% oxalic acid
Sodium, 0.02% polyacrylamide (molecular weight 15,000,000), 3% calcium hydroxide clear liquid are configured to envelope and alter agent.Stratum is squeezed into pump truck,
4000 side of injection rate.Control water sealing treatment, closing well 3 days, opening well and making production are carried out using emulsification 120 side of viscous crude.After driving a well 1 month,
Detect carbon dioxide content 2.5%, oxygen content 0.5%, hydrogen sulfide content 0ppm.Averagely produce 26.1 side of liquid daily, day oil-producing 4.5
Ton, sees positive effect.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of envelope alters agent composition, including：
Lauryl sodium sulfate 2-3 parts by weight；
Sodium oxalate 1-2 parts by weight；
Thickener 0.01-0.03 parts by weight；
Calcium hydroxide clear liquid 2-5 parts by weight.
2. composition according to claim 1, wherein, the thickener includes polyacrylamide and/or carboxymethyl cellulose
Plain sodium.
3. composition according to claim 2, wherein, the thickener is polyacrylamide, molecular weight 5,000,000-2000
Ten thousand.
4. composition according to claim 3, wherein, the polyacrylamide dosage 0.01-0.02 parts by weight.
5. composition according to claim 2, wherein, the thickener is sodium carboxymethylcellulose, 0.02-0.03 weight
Part.
It is that the mixing altered agent composition and water is added to be formulated is sealed by Claims 1 to 5 any one of them 6. a kind of envelope alters agent
Liquid.
7. envelope according to claim 6 alters agent, which, which alters agent, includes：
Lauryl sodium sulfate 2%-3%；
Sodium oxalate 1%-2%；
Thickener 0.01%-0.03%；
Calcium hydroxide clear liquid 2%-5%；
Water surplus.
It alters agent 8. a kind of using the envelope of claim 6 or 7 and implements watered out reservoirs fireflood and altered producing well selectively to seal the side altered
Method, this method include：
The envelope is altered into agent injection stratum, more than 1000 side of injection rate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711249386.XA CN108119092A (en) | 2017-12-01 | 2017-12-01 | A kind of watered out reservoirs fireflood producing well selectively envelope alters agent and its application |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711249386.XA CN108119092A (en) | 2017-12-01 | 2017-12-01 | A kind of watered out reservoirs fireflood producing well selectively envelope alters agent and its application |
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| CN201711249386.XA Pending CN108119092A (en) | 2017-12-01 | 2017-12-01 | A kind of watered out reservoirs fireflood producing well selectively envelope alters agent and its application |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109505574A (en) * | 2019-01-08 | 2019-03-22 | 中国石油天然气股份有限公司 | The flammable plugging technology of emulsification heavy oil method water logging fireflood oil reservoir |
| CN109505575A (en) * | 2019-01-08 | 2019-03-22 | 中国石油天然气股份有限公司 | A kind of flammable method for blocking of water logging fireflood oil reservoir |
| CN109594961A (en) * | 2019-01-08 | 2019-04-09 | 中国石油天然气股份有限公司 | The flammable plugging technology of aqueous rosin milk water logging fireflood oil reservoir |
| CN109652040A (en) * | 2019-01-08 | 2019-04-19 | 中国石油天然气股份有限公司 | A kind of flammable sealing agent of water logging fireflood oil reservoir oil base |
| CN109852360A (en) * | 2019-01-08 | 2019-06-07 | 中国石油天然气股份有限公司 | A kind of combustion-supporting envelope of turbid type fireflood oil reservoir alters agent |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109505574A (en) * | 2019-01-08 | 2019-03-22 | 中国石油天然气股份有限公司 | The flammable plugging technology of emulsification heavy oil method water logging fireflood oil reservoir |
| CN109505575A (en) * | 2019-01-08 | 2019-03-22 | 中国石油天然气股份有限公司 | A kind of flammable method for blocking of water logging fireflood oil reservoir |
| CN109594961A (en) * | 2019-01-08 | 2019-04-09 | 中国石油天然气股份有限公司 | The flammable plugging technology of aqueous rosin milk water logging fireflood oil reservoir |
| CN109652040A (en) * | 2019-01-08 | 2019-04-19 | 中国石油天然气股份有限公司 | A kind of flammable sealing agent of water logging fireflood oil reservoir oil base |
| CN109852360A (en) * | 2019-01-08 | 2019-06-07 | 中国石油天然气股份有限公司 | A kind of combustion-supporting envelope of turbid type fireflood oil reservoir alters agent |
| CN109652040B (en) * | 2019-01-08 | 2021-01-29 | 中国石油天然气股份有限公司 | Water flooding fire flooding oil reservoir oil-based combustible plugging agent |
| CN109505575B (en) * | 2019-01-08 | 2021-05-28 | 中国石油天然气股份有限公司 | Combustible plugging method for water flooding fire flooding oil reservoir |
| CN109594961B (en) * | 2019-01-08 | 2021-07-30 | 中国石油天然气股份有限公司 | Combustible plugging process for water-based rosin emulsion water flooding fire flooding oil reservoir |
| CN109852360B (en) * | 2019-01-08 | 2021-11-02 | 中国石油天然气股份有限公司 | Turbid liquid type fire flooding oil reservoir combustion-supporting channeling-sealing agent |
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Application publication date: 20180605 |