CN104747143A - Heavy oil diluting technology for underground combustion methane - Google Patents
Heavy oil diluting technology for underground combustion methane Download PDFInfo
- Publication number
- CN104747143A CN104747143A CN201310756013.7A CN201310756013A CN104747143A CN 104747143 A CN104747143 A CN 104747143A CN 201310756013 A CN201310756013 A CN 201310756013A CN 104747143 A CN104747143 A CN 104747143A
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- CN
- China
- Prior art keywords
- heavy oil
- combustion
- methane
- oxygen
- injected
- 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.)
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Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/70—Combining sequestration of CO2 and exploitation of hydrocarbons by injecting CO2 or carbonated water in oil wells
Abstract
The invention is applicable to oilfield heavy oil exploitation and relates to a novel heavy oil diluting technology for heavy oil exploitation of underground combustion methane. The heavy oil diluting technology includes that a concentric straight pipe string is utilized to inject oxygen, the methane and production water to the stratum; the oxygen and the methane are injected to an underground combustor for combustion through an independent pipe column, a combustion cavity is formed in the stratum close to a shaft, and a sub-surface heating layer is generated; water is injected through an annular space to have a heated layer rinsed to generate steam. The extent of combustion is controlled by controlling the proportion of injected items, and complete combustion of the oxygen can be performed by injecting more fuels. Viscosity of crude is lowered by the aid of the steam and CO2 (carbon dioxide) generated during combustion, stratum pressure is increased at the same time, and a fuel-oil emulsion is driven to enter the shaft.
Description
Technical field
Patent of the present invention belongs to oilfield exploitation heavy oil field.
Background technology
Have a kind of heavy oil recovery in oil field, the viscosity of crude oil is very high, causes exploitation difficulty.Traditional heavy oil recovery, needs to produce a large amount of water vapours from ground heating water and injects oil well, can consume a large amount of burning resources like this, produce serious carbon emission, contaminated environment simultaneously, and from ground to oil reservoir in this process, thermal loss is large, and heat utilization ratio is low.
Patent of invention content
The object of patent of the present invention is to overcome above-mentioned deficiency, devises down-hole combustion of methane dilution heavy oil technique.By in down-hole combustion of methane, the steam produced in combustion process and CO
2reduce viscosity of crude, add reservoir pressure simultaneously, drive water-oil emulsion to enter pit shaft.
Patent of the present invention for achieving the above object, by the following technical solutions:
Utilize concentric continuous-tube string, inject oxygen, methane and production water to stratum.Oxygen and methane are burnt by the burner independently at the bottom of tubing string Injection Well, form combustion chamber, produce sub-surface heating layer on the stratum close to pit shaft; Water is injected by annular space, scrubs thermosphere and produces steam.Carried out the degree of control combustion by the ratio controlling infusion, inject more fuel and oxygen can be impelled to burn completely.
Accompanying drawing explanation
Fig. 1 is dilution heavy oil process diagram.
Detailed description of the invention
As shown in Figure 1, the dilution heavy oil technique described in this patent, includes crude oil 1, pit shaft 2, ground 3, annular space 4, tubing string 5, burner 6 forms.Inject oxygen and methane from ground 3 to tubing string 5, water is injected by annular space 4, burns during burner 6 below tubing string 5 of methane and oxygen, the steam produced in combustion process and CO
2enter crude oil 1 layer, thus reduce viscosity of crude, add the reservoir pressure of crude oil 1 simultaneously, thus drive water-oil emulsion to enter pit shaft 2, reach the object of exploitation.
The above is only preferred embodiment of the present invention, not does any pro forma restriction to principle of the present invention.Every according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belong in the scope of technical scheme of the present invention.
Claims (1)
1. down-hole combustion of methane dilution heavy oil technique is used for the exploitation of oil field heavy oil.Inject oxygen, methane and production water to stratum, oxygen and methane are burnt by the burner wells independently at the bottom of tubing string Injection Well, and water is injected by annular space, scrub thermosphere and produce steam.The steam produced in combustion process and CO
2reduce viscosity of crude, add reservoir pressure simultaneously, drive water-oil emulsion to enter pit shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310756013.7A CN104747143A (en) | 2013-12-31 | 2013-12-31 | Heavy oil diluting technology for underground combustion methane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310756013.7A CN104747143A (en) | 2013-12-31 | 2013-12-31 | Heavy oil diluting technology for underground combustion methane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104747143A true CN104747143A (en) | 2015-07-01 |
Family
ID=53587322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310756013.7A Pending CN104747143A (en) | 2013-12-31 | 2013-12-31 | Heavy oil diluting technology for underground combustion methane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104747143A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4159743A (en) * | 1977-01-03 | 1979-07-03 | World Energy Systems | Process and system for recovering hydrocarbons from underground formations |
| US4457374A (en) * | 1982-06-29 | 1984-07-03 | Standard Oil Company | Transient response process for detecting in situ retorting conditions |
| CN101832553A (en) * | 2010-04-06 | 2010-09-15 | 东南大学 | Water injection type high-pressure combustion method |
| CN102080529A (en) * | 2010-12-17 | 2011-06-01 | 中国石油集团长城钻探工程有限公司 | Coal bed gas cave thermal well completion method |
| US20120067573A1 (en) * | 2006-02-21 | 2012-03-22 | Ware Charles H | Method for producing viscous hydrocarbon using steam and carbon dioxide |
| CN102425399A (en) * | 2011-12-29 | 2012-04-25 | 新奥气化采煤有限公司 | Method for exploiting oil shale |
-
2013
- 2013-12-31 CN CN201310756013.7A patent/CN104747143A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4159743A (en) * | 1977-01-03 | 1979-07-03 | World Energy Systems | Process and system for recovering hydrocarbons from underground formations |
| US4457374A (en) * | 1982-06-29 | 1984-07-03 | Standard Oil Company | Transient response process for detecting in situ retorting conditions |
| US20120067573A1 (en) * | 2006-02-21 | 2012-03-22 | Ware Charles H | Method for producing viscous hydrocarbon using steam and carbon dioxide |
| CN101832553A (en) * | 2010-04-06 | 2010-09-15 | 东南大学 | Water injection type high-pressure combustion method |
| CN102080529A (en) * | 2010-12-17 | 2011-06-01 | 中国石油集团长城钻探工程有限公司 | Coal bed gas cave thermal well completion method |
| CN102425399A (en) * | 2011-12-29 | 2012-04-25 | 新奥气化采煤有限公司 | Method for exploiting oil shale |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150701 |