CN1944951B - Atmospheric cap injection polymer barrier developing buffer zone method for layered sandstone gas cap oil field - Google Patents
Atmospheric cap injection polymer barrier developing buffer zone method for layered sandstone gas cap oil field Download PDFInfo
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- CN1944951B CN1944951B CN2006101509688A CN200610150968A CN1944951B CN 1944951 B CN1944951 B CN 1944951B CN 2006101509688 A CN2006101509688 A CN 2006101509688A CN 200610150968 A CN200610150968 A CN 200610150968A CN 1944951 B CN1944951 B CN 1944951B
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Abstract
The present invention belongs to the field of petroleum extracting technology, and is especially atmospheric polymer injecting process for forming polymer buffer area to extract oil from layered sandstone gas cap oil field. The process includes the following steps: 1. injecting polymer of molecular weight 19,000 KD in the solution concentration 2,000 mg/L through polymer barrier well for 4-5 months to form stable polymer barrier; 2. injecting polymer of molecular weight 19,000 KD in the solution concentration 1,000 mg/L directly in the buffer area, while further injecting polymer of molecular weight 19,000 KD in the solution concentration 2,000 mg/L through polymer barrier well; and 3. injecting water through polymer barrier well to convert into water flooding. Practical application shows that the process can reach buffer area recovering rate over 50 % and increase single well extractable reserve of about 10,000 ton.
Description
Technical field
The invention belongs to field of petroleum exploitation.
Background technology
Banded sandstone pneumatic jack oil field is that China finds a kind of oil field that quantity is few at present, and the grand celebration BLOCK OF LAMADIAN OIL FIELD is wherein to develop the earliest, construct the bigger oil gas field of pneumatic jack reserves.At present, China has obtained a lot of important achievement on the reservoir exploitation of this type of oil gas field, has formed comprehensively and the development technique of system; But, aspect the development technique of gas-bearing formation the development slower relatively, development approach is backward relatively.The grand celebration BLOCK OF LAMADIAN OIL FIELD is through exploitation for many years, and the pneumatic jack Wai You district that drops into exploitation has obtained development effectiveness preferably, and the pneumatic jack preservation is better relatively, is used to protect the buffer area of pneumatic jack to drop into exploitation around it always.At present, national economy develops rapidly, energy demand is relatively more nervous, be necessary the pneumatic jack and the research of buffer area development approach of being correlated with, for the pneumatic jack and the buffer area of BLOCK OF LAMADIAN OIL FIELD drops into exploitation comprehensively, the technology of carrying out is prepared, and for other pneumatic jack Oilfield developing provides technological borrowing, and then propulsive gas backs down the development of the technology of sending out.
Summary of the invention
Slower relatively in order to solve China in development aspect the development technique of gas-bearing formation, the problem that development approach falls behind relatively, the present invention proposes the poly-barrier developing buffer zone method of a kind of banded sandstone pneumatic jack oil field atmosphere teeming, this method takes pneumatic jack to annotate poly-barrier developing buffer zone method at big pneumatic jack, and concrete scheme is as follows:
A, pneumatic jack set up every the barrier stage: it is 1,900 ten thousand hydrolyzed polyacrylamide that polymer barrier well injects molecular weight, solution concentration 2000mg/L, average individual well day fluence be 80m
3/ d formed stable poly-barrier in 4～5 months, and HYDROCARBON-BEARING REGION is separated, and gas-cap gas wouldn't be exploited, and after the exploitation of buffer area input, poly-barrier enters maintenance phase;
B, buffer area development phase: poly-barrier form and stable after, it is 1,900 ten thousand hydrolyzed polyacrylamide that buffer area directly injects molecular weight, annotating poly-concentration is 1000mg/L, injection rate 0.15PV/a, average individual well day fluence be 30m
3/ d, total consumption is 800mg/L.PV; Simultaneously, polymer barrier well continues to inject 1,900 ten thousand molecular weight and concentration is the solution of 2000mg/L, and average day fluence is by 80m
3/ d is lowered to 15m
3/ d;
C, follow-up water drive stage of buffer area: buffer area changes follow-up water drive over to, and polymer barrier well transfers water filling synchronously to.
From evaluation result, oil price can reach the industry base earnings ratio under 18 dollars/barrel condition, obtains considerable economic.Annotate the numerical simulation calculation result who gathers barrier developing buffer zone from south, oil field piece pneumatic jack, the buffer area ultimate recovery is more than 50%, and average individual well increases recoverable reserves about 1 * 10
4T.
The specific embodiment
The specific embodiment one: present embodiment is achieved in that
1, poly-barrier is annotated in the pneumatic jack district, gas-cap gas wouldn't be exploited
Polymer barrier well injection molecular weight is 1,900 ten thousand polymer, solution concentration 2000mg/L.Formed stable poly-barrier in 4～5 months, HYDROCARBON-BEARING REGION is separated, gas-cap gas wouldn't be exploited.After the exploitation of buffer area input, poly-barrier enters maintenance phase.Wherein, polymer adopts the PAMA in the artificial synthetic polyacrylamide (PAM), also is hydrolyzed polyacrylamide, is made by PAM hydrolysis or acrylamide and acrylic acid copolymer.
Buffer area is annotated the poly-stage, and polymer barrier well continuation injection molecular weight is 1,900 ten thousand polymer, solution concentration 2000mg/L; Average day fluence is by 80m
3/ d is lowered to 15m
3/ d.
In the follow-up water drive stage of buffer area, polymer barrier well transfers water filling synchronously to, average day fluence 15m
3/ d.
Poly-barrier maintenance phase and since individual well day fluence low, can take every well inject by turns, the cycle injects or methods such as injections regularly, both satisfiedly safeguards needs, solves the low problem of individual-well injection rate again.
2, buffer area directly drops into exploitation in the poly-mode of driving
After poly-barrier formed, buffer area utilized second class reservoir polymer displacement oil well net, directly adopted the poly-mode of driving to drop into exploitation.
Poly-driving the stage injected molecular weight and is 1,900 ten thousand polymer, annotates poly-concentration 1000mg/L, injection rate 0.15PV/a, average individual well day fluence be 30m
3/ d.
3, the adjustment of original oil zone
Original oil zone still adopts existing well pattern to proceed the water drive exploitation, by the adjustment of oil-water well working system, avoids the poly-influence of driving exploitation of buffer area.
The specific embodiment two: grand celebration BLOCK OF LAMADIAN OIL FIELD south piece Sa II2+3 pneumatic jack is annotated poly-barrier developing buffer zone trial zone, and south gets the line of La4-353Jing and La6-352Jing, north is to 541
#Number and 542
#Number tomography, gross area 7.8km
2, arrange original oil zone three parts of perforation by gas area, buffer area and three and form.Several 168 mouthfuls of the total well of block injects Jing81Kou, 87 mouthfuls of producing wells.
Block three development phases of experience:
(1) pneumatic jack was set up every the barrier stage
Dispose 34 mouthfuls of notes polymer barrier wells in pneumatic jack district limit portion, the injection molecular weight is 1,900 ten thousand polymer, solution concentration 2000mg/L, average individual well day fluence 80m
3/ d according to numerical Simulation Prediction, separates HYDROCARBON-BEARING REGION through 5 months times, forms stable polymer every barrier.
(2) the buffer area development phase
Poly-barrier form and stable after, it is 1,900 ten thousand polymer that buffer area directly injects molecular weight, annotating poly-concentration is 1000mg/L, injection rate 0.15PV/a, average individual well day fluence be 30m
3/ d, total consumption is 800mg/L.PV.Simultaneously, polymer barrier well tentatively determines to continue to inject 1,900 ten thousand molecular weight and concentration is the solution of 2000mg/L, and average day fluence is by 80m
3/ d is lowered to 15m
3About/d.
(3) the follow-up water drive stage of buffer area
Buffer area changes follow-up water drive over to, and polymer barrier well transfers water filling synchronously to.After buffer area changed follow-up water drive over to, polymer barrier well transfers water filling synchronously to be safeguarded every barrier, average day fluence 15m
3/ d.
According to numerical simulation calculation, buffer area operation day at initial stage produce oil 445t, year produce oil 14.7 * 10
4T.Ultimate recovery is 50.6%.
Claims (3)
1. the atmosphere teeming of banded sandstone pneumatic jack oil field gathers barrier developing buffer zone method, it is characterized in that described method is:
A, pneumatic jack set up every the barrier stage: it is 1,900 ten thousand hydrolyzed polyacrylamide that polymer barrier well injects molecular weight, solution concentration 2000mg/L, average individual well day fluence be 80m
3/ d formed stable poly-barrier in 4～5 months, and HYDROCARBON-BEARING REGION is separated, and gas-cap gas wouldn't be exploited, and after the exploitation of buffer area input, poly-barrier enters maintenance phase;
B, buffer area development phase: poly-barrier form and stable after, it is 1,900 ten thousand hydrolyzed polyacrylamide that buffer area directly injects molecular weight, annotating poly-concentration is 1000mg/L, injection rate 0.15PV/a, average individual well day fluence be 30m
3/ d, total consumption is 800mg/L.PV; Simultaneously, polymer barrier well continues to inject 1,900 ten thousand molecular weight and concentration is the solution of 2000mg/L, and average day fluence is by 80m
3/ d is lowered to 15m
3/ d;
C, follow-up water drive stage of buffer area: buffer area changes follow-up water drive over to, and polymer barrier well transfers water filling synchronously to.
2. banded sandstone pneumatic jack according to claim 1 oil field atmosphere teeming gathers barrier developing buffer zone method, it is characterized in that described poly-barrier maintenance phase is taked every well injection by turns, the cycle injects or the timing injection mode is safeguarded.
3. banded sandstone pneumatic jack according to claim 1 oil field atmosphere teeming gathers barrier developing buffer zone method, it is characterized in that after buffer area changes follow-up water drive over to, and polymer barrier well transfers water filling synchronously to be safeguarded every barrier, average day fluence 15m
3/ d.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101509688A CN1944951B (en) | 2006-10-31 | 2006-10-31 | Atmospheric cap injection polymer barrier developing buffer zone method for layered sandstone gas cap oil field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101509688A CN1944951B (en) | 2006-10-31 | 2006-10-31 | Atmospheric cap injection polymer barrier developing buffer zone method for layered sandstone gas cap oil field |
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| Publication Number | Publication Date |
|---|---|
| CN1944951A CN1944951A (en) | 2007-04-11 |
| CN1944951B true CN1944951B (en) | 2011-10-05 |
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|---|---|---|---|
| CN2006101509688A Expired - Fee Related CN1944951B (en) | 2006-10-31 | 2006-10-31 | Atmospheric cap injection polymer barrier developing buffer zone method for layered sandstone gas cap oil field |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101864950B (en) * | 2010-06-18 | 2013-06-05 | 中国石油天然气股份有限公司 | Prediction method of continuous and compact sandstone gas distribution |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3788398A (en) * | 1971-12-01 | 1974-01-29 | Mobil Oil Corp | Oil recovery process |
| US4838350A (en) * | 1987-12-28 | 1989-06-13 | Texaco Inc. | Gravity stable surfactant flooding in gas depleted reservoirs |
| US5267615A (en) * | 1992-05-29 | 1993-12-07 | Christiansen Richard L | Sequential fluid injection process for oil recovery from a gas cap |
-
2006
- 2006-10-31 CN CN2006101509688A patent/CN1944951B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3788398A (en) * | 1971-12-01 | 1974-01-29 | Mobil Oil Corp | Oil recovery process |
| US4838350A (en) * | 1987-12-28 | 1989-06-13 | Texaco Inc. | Gravity stable surfactant flooding in gas depleted reservoirs |
| US5267615A (en) * | 1992-05-29 | 1993-12-07 | Christiansen Richard L | Sequential fluid injection process for oil recovery from a gas cap |
Non-Patent Citations (4)
| Title |
|---|
| 梁文富等.完善单砂体注采关系的做法及效果.大庆石油地质与开发21 3.2002,21(3),38-40. |
| 梁文富等.完善单砂体注采关系的做法及效果.大庆石油地质与开发21 3.2002,21(3),38-40. * |
| 郭万奎.大庆油田地质开发技术的进步与展望.大庆石油地质与开发23 5.2004,23(5),54-59. |
| 郭万奎.大庆油田地质开发技术的进步与展望.大庆石油地质与开发23 5.2004,23(5),54-59. * |
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Granted publication date: 20111005 Termination date: 20121031 |