CN107676071B - Low-cost yield increasing method for weakening biodegradation and thickening of crude oil - Google Patents
Low-cost yield increasing method for weakening biodegradation and thickening of crude oil Download PDFInfo
- Publication number
- CN107676071B CN107676071B CN201610628270.6A CN201610628270A CN107676071B CN 107676071 B CN107676071 B CN 107676071B CN 201610628270 A CN201610628270 A CN 201610628270A CN 107676071 B CN107676071 B CN 107676071B
- Authority
- CN
- China
- Prior art keywords
- sewage
- water
- development
- crude oil
- low
- 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.)
- Active
Links
- 239000010779 crude oil Substances 0.000 title claims abstract description 31
- 230000008719 thickening Effects 0.000 title claims abstract description 29
- 238000006065 biodegradation reaction Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000003313 weakening effect Effects 0.000 title claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000010865 sewage Substances 0.000 claims abstract description 28
- 239000003921 oil Substances 0.000 claims abstract description 26
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000001301 oxygen Substances 0.000 claims abstract description 13
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 13
- 238000011084 recovery Methods 0.000 claims abstract description 11
- 244000005700 microbiome Species 0.000 claims abstract description 8
- 238000002347 injection Methods 0.000 claims abstract description 6
- 239000007924 injection Substances 0.000 claims abstract description 6
- 238000010793 Steam injection (oil industry) Methods 0.000 claims abstract description 4
- 230000015556 catabolic process Effects 0.000 claims abstract description 4
- 238000006731 degradation reaction Methods 0.000 claims abstract description 4
- 230000008859 change Effects 0.000 claims abstract description 3
- 241000894006 Bacteria Species 0.000 claims description 5
- 239000010426 asphalt Substances 0.000 claims description 5
- 230000000638 stimulation Effects 0.000 claims description 5
- 239000000295 fuel oil Substances 0.000 claims description 4
- 239000013618 particulate matter Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005406 washing Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 241001148470 aerobic bacillus Species 0.000 description 1
- 230000008953 bacterial degradation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/20—Displacing by water
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Treatment Of Biological Wastes In General (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention provides a low-cost yield increasing method for weakening biodegradation thickening of crude oil, which comprises the following steps: step 1, suspending water-drive cold recovery development of a high-temperature oil reservoir which is too thick and difficult to recover; step 2, injecting steam into the ground, and trying to change to steam huff and puff development; step 3, if the yield is increased after the steam huff and puff, continuing steam injection development, and if the yield is reduced, changing the production into cheap sewage drive development; step 4, standing the sewage to naturally reduce the content of oxygen and particulate matters, and then carrying out primary ultraviolet lamp irradiation to weaken the degradation of microorganisms in water to crude oil; and step 5, controlling the sewage injection speed to heat water by the oil reservoir, and realizing the natural hot sewage flooding. The low-cost yield increasing method for weakening the biodegradation thickening of the crude oil has better operability, innovativeness and practicability, is beneficial to popularization, and provides a feasible method for preventing the thickening of the crude oil caused by strong washing at low cost.
Description
Technical Field
The invention relates to the technical field of oilfield development, in particular to a low-cost yield increasing method for weakening biodegradation and thickening of crude oil.
Background
At present, the water drive development mode is adopted, so that crude oil is thickened, and the produced fluid has high water content. Experts in the geochemistry industry such as Jinqiang generally consider that most of heavy oil is biodegradable oil; oil and gas geochemistry textbooks authored by either champion indicate that biodegradation is the most prominent cause of crude oil thickening; under experimental conditions, 8 weeks were required for the biodegradation experiments to degrade the thin oil to bitumen. Water flooding is the most important displacement development mode for oil fields, but causes rapid thickening of crude oil, wherein the thickening is caused by both biochemical and physical reasons. The thickened oil is biodegradable oil, aerobic bacteria in water are the cause of biodegradation of crude oil, but at present, no method for removing oxygen and microorganisms in water at low cost exists. The long-term water drive can cause crude oil thickening, so that the oil field is in an ultrahigh water-containing period, the oil cannot be produced by water drive because of thickening, and the phenomenon of ultrahigh water content of produced liquid is shown by a dominant asphalt channel of water flow. Water drive to thermal recovery sometimes fails, making inefficient wells ineffective, i.e. no matter water drive cold recovery or steam injection thermal recovery, residual oil cannot be developed. However, performing one round of thermal recovery will eliminate microbes, reduce thickening in terms of biodegradation, and serve to reduce biodegradation even if the thermal recovery fails.
The method is invented for preventing crude oil from thickening caused by strong water washing and ensuring that the continuous development of the oil field is realized under the conditions of low cost and no conversion of the original development mode, and the technical problems are solved.
Disclosure of Invention
The invention aims to provide a low-cost yield increasing method which has better operability, innovativeness and practicability, is beneficial to popularization and weakens the biodegradation and thickening of crude oil.
The object of the invention can be achieved by the following technical measures: a low-cost stimulation method for reducing the biodegradation and thickening of crude oil, which comprises the following steps: step 1, suspending water-drive cold recovery development of a high-temperature oil reservoir which is too thick and difficult to recover; step 2, injecting steam into the ground, and trying to change to steam huff and puff development; step 3, if the yield is increased after the steam huff and puff, continuing steam injection development, and if the yield is reduced, changing the production into cheap sewage drive development; step 4, standing the sewage to naturally reduce the content of oxygen and particulate matters, and performing primary ultraviolet lamp irradiation sterilization after standing to weaken biodegradation; and step 5, controlling the sewage injection speed to heat water by the oil reservoir, and realizing the natural hot sewage flooding.
The object of the invention can also be achieved by the following technical measures:
in the step 1, for an oil reservoir with the underground temperature of 50-80 ℃, crude oil biodegradation and thickening are caused by water drive, the viscosity is increased, a heavy oil asphalt dominant channel is formed, the produced liquid is high in water content, and conventional water drive development is suspended.
In step 2, steam is injected underground, after microorganisms are inactivated at high temperature, steam huff and puff development is tried, and no matter how the rotary driving effect is, a low-bacteria-containing environment is created.
In the step 3, after steam huff and puff development is switched, if the yield is increased, a huff and puff development mode is continuously adopted, if the yield is reduced, a low-bacteria-containing environment caused by steam is switched into improved sewage flooding, water used for water flooding is placed in a closed space, and the content of oxygen and particulate matters is naturally reduced through closed standing for a period of time.
And 4, standing the sewage in the closed space to reduce the content of oxygen and particulate matters, and irradiating the sewage by using an ultraviolet lamp once after standing for one week so as to weaken the degradation of microorganisms in the water to crude oil.
In step 5, the sewage injection speed is controlled to reduce the temperature amplitude of the underground oil reservoir within 10 ℃, and the natural hot sewage with low oxygen content, low particulate matter content and low bacteria content is utilized to develop hot water so as to weaken crude oil thickening caused by biodegradation.
The low-cost yield increasing method for weakening the biodegradation thickening of the crude oil has clear technical thought and simple application, establishes the low-cost yield increasing method for weakening the biodegradation thickening of the crude oil, has better operability, innovativeness and practicability, is beneficial to popularization, and provides a feasible method for preventing the thickening of the crude oil caused by strong washing at low cost.
Drawings
FIG. 1 is a flow diagram of one embodiment of a low cost stimulation method of reducing biodegradation thickening of crude oil according to the present invention.
Detailed Description
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
FIG. 1 is a flow diagram of one embodiment of a low cost stimulation method of reducing the biodegradation thickening of crude oil according to the present invention.
In step 101, water drive cold recovery development is suspended for oil reservoirs which have underground temperature of 50-80 ℃ and are difficult to recover due to over-thick oil. Areas of water flooding development are suspended because water flooding biodegradation causes thickening of the crude oil, increases viscosity, results in the formation of a heavy oil bitumen dominant channel, and a high water, extra high water oil zone of the production fluid.
In step 102, steam is injected into the ground, the high temperature kills underground microorganisms, and steam stimulation development is attempted, which can also result in a low bacteria-containing environment if failure occurs.
In step 103, after the steam huff and puff development is attempted, if the yield is not good, the low-bacteria environment caused by steam is just utilized, the improved sewage flooding is performed, the sewage is covered with a plastic film and is sealed and kept still, and the content of oxygen and particulate matters is naturally reduced.
In step 104, standing for one week, reducing oxygen and particulate matter, and irradiating with ultraviolet lamp to reduce bacteria content.
In step 105, a sewage driving mode with low cost after improvement is adopted, and a development mode is remedied. According to the above standards, a low-cost yield-increasing method for weakening the biodegradation and thickening of crude oil can be realized.
The injection speed of the sewage is controlled to reduce the temperature amplitude of the underground oil reservoir to be within 10 ℃, and the natural hot sewage with low oxygen content, low particulate matter content and low bacteria content is utilized for hot water development, so that crude oil thickening caused by biodegradation can be weakened. The flow ends.
Whether aerobic or anaerobic bacterial degradation occurs before oil is sequestered in the ultra high water cut, this approach significantly attenuates thickening due to biodegradation and enhances ultimate recovery. And even if the water drive is converted into thermal recovery and fails, the improved sewage can be used for driving and developing, so that the harm is changed into the benefit, and the method has important significance for low-cost sustainable development of oil fields.
Claims (1)
1. A low-cost stimulation method for weakening the biodegradation and thickening of crude oil, which is characterized by comprising the following steps:
step 1, suspending water-drive cold recovery development of a high-temperature oil reservoir which is too thick and difficult to recover;
step 2, injecting steam into the ground, and trying to change to steam huff and puff development;
step 3, after steam huff and puff, if the yield is improved, steam injection development is continued, and if the yield is reduced, sewage flooding development is changed;
step 4, standing the sewage to naturally reduce the content of particulate matters and oxygen, and then carrying out primary ultraviolet lamp irradiation to weaken the degradation of microorganisms in water to crude oil;
step 5, controlling the sewage injection speed to heat water by the oil reservoir, and realizing the natural hot sewage flooding;
in the step 1, for an oil reservoir with the underground temperature of 50-80 ℃, crude oil biodegradation and thickening are caused by water drive, the viscosity is increased, a heavy oil asphalt dominant channel is formed, the produced liquid is high in water content, and conventional water drive development is suspended;
in the step 2, steam is injected into the ground, steam huff and puff development is tried after microorganisms are inactivated at high temperature, and no matter how the rotary driving effect is, a low-bacteria-containing environment is created;
in the step 3, after steam huff and puff development is switched, if the yield is increased, a huff and puff development mode is continuously adopted, if the yield is reduced, a low-bacteria-containing environment caused by steam is switched into improved sewage flooding, water used for water flooding is placed in a closed space, and the content of oxygen and particulate matters is naturally reduced through closed standing for a period of time;
in step 4, standing the sewage in a closed space to reduce the content of oxygen and particulate matters, and after standing for one week, carrying out ultraviolet lamp irradiation on the sewage once to weaken the degradation of microorganisms in water on crude oil;
in step 5, the sewage injection speed is controlled to reduce the temperature amplitude of the underground oil reservoir within 10 ℃, and the natural hot sewage with low oxygen content, low particulate matter content and low bacteria content is utilized to develop hot water so as to weaken crude oil thickening caused by biodegradation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610628270.6A CN107676071B (en) | 2016-08-01 | 2016-08-01 | Low-cost yield increasing method for weakening biodegradation and thickening of crude oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610628270.6A CN107676071B (en) | 2016-08-01 | 2016-08-01 | Low-cost yield increasing method for weakening biodegradation and thickening of crude oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107676071A CN107676071A (en) | 2018-02-09 |
| CN107676071B true CN107676071B (en) | 2020-03-20 |
Family
ID=61133008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610628270.6A Active CN107676071B (en) | 2016-08-01 | 2016-08-01 | Low-cost yield increasing method for weakening biodegradation and thickening of crude oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107676071B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1710014A (en) * | 2005-06-30 | 2005-12-21 | 大庆沃太斯化工有限公司 | Biological enzyme oil-displacing agent for increasing crude oil production rate and its oil displacing method |
| CN101131087A (en) * | 2006-08-25 | 2008-02-27 | 上海中油企业集团有限公司 | Biological oil production method for extra-heavy crude oil |
| CN103534330A (en) * | 2011-04-12 | 2014-01-22 | 格洛里能源有限公司 | Systems and methods of microbial enhanced oil recovery |
| CN103865820A (en) * | 2012-12-10 | 2014-06-18 | 中国石油天然气股份有限公司 | Tenghuang yellow unicellular bacterium and preparation and application thereof |
| CN105217895A (en) * | 2015-10-30 | 2016-01-06 | 无锡市嘉邦电力管道厂 | Heavy crude sewage water treating method |
| CN105347609A (en) * | 2015-10-23 | 2016-02-24 | 中国石油化工股份有限公司 | Drilling wastes recycling method |
| CN105368431A (en) * | 2014-08-27 | 2016-03-02 | 中国石油化工股份有限公司 | Oil-displacing composition, preparing method of oil-displacing composition and intensified oil production method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2011344109B2 (en) * | 2010-12-14 | 2015-07-09 | Aquatech International, Llc | Method for recycling deoiled water using counterflow falling-film evaporators |
-
2016
- 2016-08-01 CN CN201610628270.6A patent/CN107676071B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1710014A (en) * | 2005-06-30 | 2005-12-21 | 大庆沃太斯化工有限公司 | Biological enzyme oil-displacing agent for increasing crude oil production rate and its oil displacing method |
| CN101131087A (en) * | 2006-08-25 | 2008-02-27 | 上海中油企业集团有限公司 | Biological oil production method for extra-heavy crude oil |
| CN103534330A (en) * | 2011-04-12 | 2014-01-22 | 格洛里能源有限公司 | Systems and methods of microbial enhanced oil recovery |
| CN103865820A (en) * | 2012-12-10 | 2014-06-18 | 中国石油天然气股份有限公司 | Tenghuang yellow unicellular bacterium and preparation and application thereof |
| CN105368431A (en) * | 2014-08-27 | 2016-03-02 | 中国石油化工股份有限公司 | Oil-displacing composition, preparing method of oil-displacing composition and intensified oil production method |
| CN105347609A (en) * | 2015-10-23 | 2016-02-24 | 中国石油化工股份有限公司 | Drilling wastes recycling method |
| CN105217895A (en) * | 2015-10-30 | 2016-01-06 | 无锡市嘉邦电力管道厂 | Heavy crude sewage water treating method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107676071A (en) | 2018-02-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10538990B2 (en) | Using colloidal silica as a zonal isolation material and fast path blocker in geological formations | |
| Sen | Biotechnology in petroleum recovery: the microbial EOR | |
| US3332487A (en) | Aerobic bacteria in oil recovery | |
| US9670395B2 (en) | Treatment of a subterranean formation with composition including a microorganism or compound generated by the same | |
| Bryant | Potential uses of microorganisms in petroleum recovery technology | |
| CN105114048A (en) | Horizontal well staged fracturing oil production method through injection and production in same well | |
| KR101481459B1 (en) | Bitumen mining method of oil sand using biological treatment | |
| NO20060118L (en) | Viscous, cross-linked, breakable, aqueous liquid and methods for treating underground formations with such liquid | |
| BRPI0418369B1 (en) | fracturing method of an underground formation | |
| CN107676071B (en) | Low-cost yield increasing method for weakening biodegradation and thickening of crude oil | |
| Guo et al. | Progress of microbial enhanced oil recovery in China | |
| SA519410555B1 (en) | Composition and Method for Water and Gas Shut-Off in Subterranean Formations | |
| CN106522906B (en) | Welan gum improves the application of recovery ratio in ultrahigh-temperature oil reservoir oil displacement | |
| Prajapat et al. | Reservoir souring control using benzalkonium chloride and nitrate in bioreactors simulating oil fields of western India | |
| Alvarado et al. | Engineering design challenges and opportunities beyond waterflooding in offshore reservoirs | |
| CN108729893A (en) | A kind of foam composite cold mining method improving recovery factor of heavy oil reservoir | |
| CN105089587A (en) | Method for improving crude oil recovery ratio in underground oil reservoir in later period of oil field oil recovery | |
| Maleki et al. | Bio‐enhanced oil recovery (BEOR) methods: All‐important review of the occasions and challenges | |
| BR112012022123A2 (en) | method to introduce into tackiness treatment fluid | |
| Gussenov et al. | Application of polymer gellan for injectivity profile leveling | |
| Temizel et al. | Production optimization under injection of biopolymer, synthetic polymer and gels in a heterogeneous reservoir | |
| Achim et al. | Polymer gelled technology to improve sweep efficiency in enhanced oil recovery: A literature review | |
| US20090200015A1 (en) | Method and liquid for increasing the recovery factor in oil reservoirs | |
| Ollivier et al. | Petroleum: from formation to microbiology | |
| CN104927819A (en) | Oilfield high-efficiency composite descaling plugging removal solution |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |