CN104500014A - Mining method of thickened oil dual horizontal well - Google Patents
Mining method of thickened oil dual horizontal well Download PDFInfo
- Publication number
- CN104500014A CN104500014A CN201410828875.0A CN201410828875A CN104500014A CN 104500014 A CN104500014 A CN 104500014A CN 201410828875 A CN201410828875 A CN 201410828875A CN 104500014 A CN104500014 A CN 104500014A
- Authority
- CN
- China
- Prior art keywords
- horizontal well
- dual horizontal
- steam
- injection
- sagd
- 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
-
- 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
- E21B43/2406—Steam assisted gravity drainage [SAGD]
- E21B43/2408—SAGD in combination with other methods
Abstract
The invention discloses a mining method of a thickened oil dual horizontal well. The mining method adopts an SAGD (Steam Assisted Gravity Drainage) circulation preheating method; circulation preheating steam containing a heating assistant is injected into an injection well of the dual horizontal well before or in an SAGD circulation preheating process; the heating assistant is non-condensate gas or a chemical reagent decomposed to generate the non-condensate gas under an oil layer condition; the non-condensate gas is one of or a mixture of nitrogen, carbon dioxide, ammonia and methane; and the chemical reagent decomposed to generate the non-condensate gas under the oil layer condition is one of or a mixture of formamide, ammonium chloride and sodium nitrite. The mining method can improve heat transfer efficiency, shorten the circulation preheating time, and reduce steam consumption; the heating assistant added can greatly reduce viscosity of thickened oil and improve; and the heating assistant is wide in source, low in cost, convenient to transport, easy to inject and safe in construction.
Description
Technical field
The invention belongs to technical field of petroleum extraction, especially belong to a kind of thickened oil recovery method, particularly a kind of viscous crude dual horizontal well exploitation method.
Background technology
SAGD (SAGD) is a cutting edge technology of exploitation super-viscous oil, has that oil displacement efficiency is high, recovery ratio high.SAGD exploitation is divided into two stages: the startup stage of SAGD and the SAGD production phase.Mainly between Injection Well and producing well, realizing thermal communication and hydraulic communication startup stage of SAGD, creating conditions for proceeding to SAGD production.Current SAGD mainly contains steam soak pipeline start up by preheating and steam injected cycle pipeline start up by preheating two kinds of methods.Steam soak pipeline start up by preheating injection pressure is high, temperature is high, easily causes damage to completion interval of well body structure, and horizontal segment inhales vapour lack of homogeneity, easily produces later stage SAGD and causes adverse effect; Steam injected cycle pipeline start up by preheating inhales vapour homogeneous heating, and start steadily, but supporting cyclic preheat tubular column structure is complicated, cyclic preheat mechanism still needs further research, cyclic preheat parameter optimization difficulty.
At home, certain oil field, by the mode of communicating of steam soak preheating, realize the gravity drainage of straight well and horizontal well combination, but dual horizontal well SAGD is still in conceptual phase from pipeline start up by preheating to manufacture control.SAGD cyclic preheat is basis and the important stage of SAGD super heavy oil development technology, is also a great problem of SAGD development technique simultaneously.Domestic once had oil field to carry out the experiment of SAGD cyclic preheat, but cyclic preheat effect is undesirable, and horizontal segment connecting degree is not high, and the cyclic preheat time is longer, and the thermal efficiency is lower.There is difference in various degree due to factors such as characteristics of reservoirs, circulation pipe string structure, operating parameter, pre-heating means in each elephant, at present, not yet forms unified working specification and standard both at home and abroad about dual horizontal well SAGD cyclic preheat technology.Domestic dual horizontal well SAGD super heavy oil development technology is in the starting stage, and cyclic preheat correlation technique awaits research.
Summary of the invention
The present invention discloses a kind of exploitation method of viscous crude dual horizontal well according to the deficiencies in the prior art.The object of the invention is to provide a kind of heat trnasfer can accelerating steam, shortens the cyclic preheat time, reduces the exploitation method of the viscous crude dual horizontal well SAGD cyclic preheat high-speed communication of steam consumption.
The present invention is achieved through the following technical solutions:
The exploitation method of viscous crude dual horizontal well, described exploitation method adopts SAGD cyclic preheat method, it is characterized in that: cross in Cheng Qian or process at SAGD cyclic preheat, in dual horizontal well Injection Well, inject the cyclic preheat steam containing heating auxiliary agent, described heating auxiliary agent is non-condensation gas or under reservoir condition, decomposes the chemical agent producing non-condensation gas.
Described non-condensation gas is one or more the mixture in nitrogen, carbon dioxide, ammonia, methane.
The described chemical agent decomposing the non-condensation gas of generation under reservoir condition is one or more the mixture in formamide, ammonium chloride, natrium nitrosum.
Further described heating auxiliary agent implantation quality is the 10-30% of steam injection quality.
Above-mentioned cyclic preheat steam injection speed is 50-150 ton/sky, and heating auxiliary agent together injects from Injection Well supervisor with steam.
Above-mentioned dual horizontal well is Injection Well and producing well, and Injection Well is positioned at 5 ± 1m position above producing well.
The present invention assists SAGD cyclic preheat by injecting a kind of heating auxiliary agent, the non-condensation gas of heating auxiliary agent has good osmosis, carry steam and heat oil reservoir together, the heat trnasfer of steam can be accelerated, shorten the cyclic preheat time, reduce steam consumption, adopt chemical agent decomposition method can issue solution estranged in high-temperature steam effect, and further release heat.
The present invention has following beneficial effect compared with the prior art: (1) this exploitation method can improve heat transfer efficiency, shortens the cyclic preheat time; (2) this exploitation method can reduce steam consumption; (3) this exploitation method significantly can reduce viscosity of thickened oil, enhances productivity; (4) this heating auxiliary agent source is wide, and cost is low; Convenient transportation, easily injects, construction safety.
Accompanying drawing explanation
The following drawings is only intended to schematically illustrate the present invention and explain, not now due to scope of the present invention, wherein:
Fig. 1 heats auxiliary agent to inject schematic diagram in the present invention;
Fig. 2 is logistics organizations device schematic diagram.
In figure, 1 is looped pipeline, and 2 is supervisors, and 3 is heating auxiliary agent cars, and 4 is steam injections, and 5 is that heating auxiliary agent injects.
Detailed description of the invention
Below by embodiment, the present invention is specifically described; embodiment is only for being further detailed the present invention; can not be interpreted as limiting the scope of the invention, some nonessential improvement that those skilled in the art makes according to the content of the invention described above and adjustment also belong to the scope of protection of the invention.
By reference to the accompanying drawings.
The exploitation method of viscous crude dual horizontal well, comprising:
Cross in Cheng Qian or process at SAGD cyclic preheat, from supervisor's injection heating auxiliary agent of dual horizontal well Injection Well.
Implementing well is dual horizontal well well pair, and comprise Injection Well and producing well, Injection Well is positioned at 5m right position above producing well.
The selection of heating auxiliary agent.Heating auxiliary agent used is non-condensation gas or can decomposes the chemical agent producing non-condensation gas under reservoir condition.Non-condensation gas is one or more the mixture in nitrogen, carbon dioxide, ammonia, methane.Can decompose the chemical agent producing non-condensation gas and surfactant under reservoir condition is with one or more the mixture in formamide, ammonium chloride, natrium nitrosum.
Cyclic preheat steam injection speed is 50-150 ton/sky, and heating auxiliary agent implantation quality is the 10-30% of steam injection quality, and chemical agent carries steam and heats oil reservoir together.
Below by simulated test, the present invention will be described.Thing die device is shown in accompanying drawing 2.Whole device is primarily of compositions such as injected system, rock core system, extraction systems.Injected system is made up of steam generator, steel cylinder, injection pump etc.Rock core system is cylindrical shape, long 50cm, diameter 40cm, is made up of steam channel, haydite and two temperature pick ups.Extraction system is primarily of condenser system and Produced Liquid receiver composition.Characterize rate of heat transfer by temperature rate-of-rise, the recovered water of collection characterizes steam consumption.
Embodiment 1:
In SAGD cyclic preheat logistics organizations, injection string is positioned at the center of thing die device, temperature pick up is positioned at 15cm above injection string, steam injects from injection string, accompany the nitrogen of steam injection consumption 10% simultaneously, with only inject vapor phase ratio, companion's nitrogen injection temperature pick up reaches the time shorten 8% required for 100 DEG C, and steam consumption reduces 6%.
Embodiment 2:
In SAGD cyclic preheat logistics organizations, injection string is positioned at the center of thing die device, temperature pick up is positioned at 15cm above injection string, steam injects from injection string, accompany the carbon dioxide of steam injection consumption 10% simultaneously, with only inject vapor phase ratio, companion's nitrogen injection temperature pick up reaches the time shorten 10% required for 100 DEG C, and steam consumption reduces 8%.
Embodiment 3:
In SAGD cyclic preheat logistics organizations, injection string is positioned at the center of thing die device, temperature pick up is positioned at 15cm above injection string, steam injects from injection string, accompany the ammonia of steam injection consumption 10% simultaneously, with only inject vapor phase ratio, companion's nitrogen injection temperature pick up reaches the time shorten 6% required for 100 DEG C, and steam consumption reduces 4%.
Embodiment 4:
In SAGD cyclic preheat logistics organizations, injection string is positioned at the center of thing die device, temperature pick up is positioned at 15cm above injection string, steam injects from injection string, accompany the formamide of steam injection consumption 10% simultaneously, with only inject vapor phase ratio, companion's nitrogen injection temperature pick up reaches the time shorten 9% required for 100 DEG C, and steam consumption reduces 7%.
Embodiment 5:
In SAGD cyclic preheat logistics organizations, injection string is positioned at the center of thing die device, temperature pick up is positioned at 15cm above injection string, steam injects from injection string, accompany ammonium chloride and the natrium nitrosum of steam injection consumption 10% simultaneously, with only inject vapor phase ratio, companion's nitrogen injection temperature pick up reaches the time shorten 7% required for 100 DEG C, and steam consumption reduces 5%.
Comprehensive each embodiment data can be known, different non-condensation gas (nitrogen, carbon dioxide and ammonia) shows the logistics organizations that SAGD cyclic preheat conducts heat, non-condensate gas body can improve the rate of heat transfer of steam, and improves heat transfer efficiency, reduces steam consumption.
Claims (6)
1. the exploitation method of a viscous crude dual horizontal well, described exploitation method adopts SAGD cyclic preheat method, it is characterized in that: cross in Cheng Qian or process at SAGD cyclic preheat, in dual horizontal well Injection Well, inject the cyclic preheat steam containing heating auxiliary agent, described heating auxiliary agent is non-condensation gas or under reservoir condition, decomposes the chemical agent producing non-condensation gas.
2. the exploitation method of viscous crude dual horizontal well according to claim 1, is characterized in that: described non-condensation gas is one or more the mixture in nitrogen, carbon dioxide, ammonia, methane.
3. the exploitation method of viscous crude dual horizontal well according to claim 1, is characterized in that: the described chemical agent decomposing the non-condensation gas of generation under reservoir condition is one or more the mixture in formamide, ammonium chloride, natrium nitrosum.
4. the exploitation method of the viscous crude dual horizontal well according to claim 1 or 2 or 3, is characterized in that: described heating auxiliary agent implantation quality is the 10-30% of steam injection quality.
5. the exploitation method of viscous crude dual horizontal well according to claim 4, is characterized in that: described cyclic preheat steam injection speed is 50-150 ton/sky, and heating auxiliary agent together injects from Injection Well supervisor with steam.
6. the exploitation method of viscous crude dual horizontal well according to claim 5, is characterized in that: described dual horizontal well is Injection Well and producing well, and Injection Well is positioned at 5 ± 1m position above producing well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410828875.0A CN104500014A (en) | 2014-12-25 | 2014-12-25 | Mining method of thickened oil dual horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410828875.0A CN104500014A (en) | 2014-12-25 | 2014-12-25 | Mining method of thickened oil dual horizontal well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104500014A true CN104500014A (en) | 2015-04-08 |
Family
ID=52941453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410828875.0A Pending CN104500014A (en) | 2014-12-25 | 2014-12-25 | Mining method of thickened oil dual horizontal well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104500014A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832141A (en) * | 2015-04-13 | 2015-08-12 | 中国石油天然气股份有限公司 | Solvent-assisted horizontal well interwell communication method |
| CN106499374A (en) * | 2015-09-07 | 2017-03-15 | 中国石油天然气股份有限公司 | A kind of method that use ammonia improves SAGD development effectiveness |
| CN106593368A (en) * | 2016-12-07 | 2017-04-26 | 中国石油天然气股份有限公司 | Pre-treating method for improving SAGD development effect |
| CN106593367A (en) * | 2015-10-14 | 2017-04-26 | 中国石油天然气股份有限公司 | Start method for steam-assisted gravity drainage of heavy oil reservoir |
| CN106640003A (en) * | 2016-11-14 | 2017-05-10 | 中国石油天然气股份有限公司 | Method for improving development effect of steam assisted gravity drainage (SAFD) through ammonium carbonate |
| CN106640002A (en) * | 2015-11-03 | 2017-05-10 | 中国石油天然气股份有限公司 | Exploitation method of thickened oil |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7090014B2 (en) * | 1999-10-26 | 2006-08-15 | Alberta Science And Research Authority | Process for sequentially applying SAGD to adjacent sections of a petroleum reservoir |
| CN101592028A (en) * | 2008-05-28 | 2009-12-02 | 中国石油天然气股份有限公司 | The method of the super viscous crude of the auxiliary SAGD exploitation of a kind of gas |
| CN103939069A (en) * | 2014-03-13 | 2014-07-23 | 中国石油大学(北京) | Steam-gas displacement and gravity oil drain composite exploiting method |
-
2014
- 2014-12-25 CN CN201410828875.0A patent/CN104500014A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7090014B2 (en) * | 1999-10-26 | 2006-08-15 | Alberta Science And Research Authority | Process for sequentially applying SAGD to adjacent sections of a petroleum reservoir |
| CN101592028A (en) * | 2008-05-28 | 2009-12-02 | 中国石油天然气股份有限公司 | The method of the super viscous crude of the auxiliary SAGD exploitation of a kind of gas |
| CN103939069A (en) * | 2014-03-13 | 2014-07-23 | 中国石油大学(北京) | Steam-gas displacement and gravity oil drain composite exploiting method |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832141A (en) * | 2015-04-13 | 2015-08-12 | 中国石油天然气股份有限公司 | Solvent-assisted horizontal well interwell communication method |
| CN106499374A (en) * | 2015-09-07 | 2017-03-15 | 中国石油天然气股份有限公司 | A kind of method that use ammonia improves SAGD development effectiveness |
| CN106593367A (en) * | 2015-10-14 | 2017-04-26 | 中国石油天然气股份有限公司 | Start method for steam-assisted gravity drainage of heavy oil reservoir |
| CN106593367B (en) * | 2015-10-14 | 2019-04-09 | 中国石油天然气股份有限公司 | The starting method of heavy crude reservoir steam assisted gravity drainage |
| CN106640002A (en) * | 2015-11-03 | 2017-05-10 | 中国石油天然气股份有限公司 | Exploitation method of thickened oil |
| CN106640003A (en) * | 2016-11-14 | 2017-05-10 | 中国石油天然气股份有限公司 | Method for improving development effect of steam assisted gravity drainage (SAFD) through ammonium carbonate |
| CN106593368A (en) * | 2016-12-07 | 2017-04-26 | 中国石油天然气股份有限公司 | Pre-treating method for improving SAGD development effect |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104500014A (en) | Mining method of thickened oil dual horizontal well | |
| CN102587877B (en) | Multi-element thermal fluid displacement process | |
| CN103603638B (en) | A kind of gas hydrates CO in conjunction with voltage drop method2Replacement exploitation method | |
| CN103061730B (en) | A kind of multielement hot fluid foam flooding is for coal bed methane exploring method | |
| CN102628350B (en) | Propane-injecting shallow heavy oil reservoir exploitation method | |
| CA2840323C (en) | An oil recovery process with composition-adjustable multi-component thermal fluid (mctf) | |
| CN106894799B (en) | Device and method for displacing coal bed gas by using supercritical carbon dioxide | |
| CN102230372A (en) | Thermal recovery technology of multielement thermal fluid of thickened oil well | |
| CN205117321U (en) | Super supercritical carbon dioxide , nitrogen gas, compound fracturing system of water conservancy | |
| CN105545273A (en) | Device and method for exploiting terrestrial natural gas hydrates through CO2 fracturing and displacing | |
| CN103216219A (en) | Method for extracting natural gas hydrate through CO2/N2 underground replacement | |
| CN103180543A (en) | Method and apparatus for thermally treating an oil reservoir | |
| CN105840159A (en) | Natural gas hydrate extraction device and extraction method based on solar technology | |
| CN101004132A (en) | Exploitation technique for disgorging thick oil by pouring air to assistant steam | |
| CN110145288B (en) | Method for improving recovery ratio of heavy oil reservoir by hot nitrogen foam in later period of multi-turn steam huff and puff | |
| CN105545270B (en) | A kind of situ combustion method gas hydrate mining methods and device | |
| CN103806885B (en) | A kind of formation chemistry heat production removing clog in deep reservoir method of injection and extraction system | |
| CN102937016A (en) | Method for enhancing recovery ratio of coal-bed gas by injecting hot carbon dioxide into coal bed | |
| CN108729893B (en) | Foam composite cold recovery method for improving recovery ratio of heavy oil reservoir | |
| CA2698454A1 (en) | Improved in-situ combustion recovery process using single horizontal well to produce oil and combustion gases to surface | |
| NO20130721A1 (en) | Increased oil recovery in reservoirs with low permeability | |
| CN104612640A (en) | Underground coal mine drilling, heat injection and hole sealing integration method | |
| CN113982546A (en) | Evaluation method for carbon dioxide injection profile of horizontal well | |
| CN104948153A (en) | Solvent-assisted SAGD three-dimensional physical simulation experiment method and device | |
| CN104847321A (en) | Horizontal well thermo-chemical oil extraction method for ultra-deep thickened oil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150408 |