CN104564049A - Detection method of polymer flooding and gathering channel - Google Patents
Detection method of polymer flooding and gathering channel Download PDFInfo
- Publication number
- CN104564049A CN104564049A CN201510031288.3A CN201510031288A CN104564049A CN 104564049 A CN104564049 A CN 104564049A CN 201510031288 A CN201510031288 A CN 201510031288A CN 104564049 A CN104564049 A CN 104564049A
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- Prior art keywords
- poly
- oil
- polymer flooding
- altering
- polymer
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- 229920000642 polymer Polymers 0.000 title claims abstract description 63
- 238000001514 detection method Methods 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 239000003129 oil well Substances 0.000 claims abstract description 19
- 230000001965 increasing effect Effects 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 239000012530 fluid Substances 0.000 claims description 11
- 239000011148 porous material Substances 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000013507 mapping Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 15
- 238000011161 development Methods 0.000 abstract description 11
- 238000011084 recovery Methods 0.000 abstract description 8
- 238000012360 testing method Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000700 radioactive tracer Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 230000037361 pathway Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000004883 computer application Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000155 isotopic effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
-
- 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
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- 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)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The invention discloses a detection method of a polymer flooding and gathering channel, which detects a gathering channel of a polymer flooding oil field through a characteristic curve of oil producing, gathering and increasing oil indexes. The method comprises the steps of collecting oil production and liquid production capacity of an oil well and the concentration data of polymers in output liquid; calculating the output of polymers, i.e. production and gathering amount; obtaining accumulative oil increment, accumulative production and gathering amount producing, gathering and increasing oil indexes; making the characteristic curve of the producing, gathering and increasing oil indexes; detecting the gathering degree and the gathering channel in accordance with the characteristic curve patterns of the producing, gathering and increasing oil indexes. The method is simple to operate and strong in practicality; furthermore, the technical support can be provided to improve the development effect of the polymer flooding and furthermore improve the recovery ratio of polymer flooding oil field.
Description
Technical field
The present invention relates to a kind of for detection method of altering passage poly-in the development process of polymer flooding oil field, to in particular, provide based on the development behavior data of polymer flooding oil field poly-alters degree and poly-detection method of altering passage, for improving polymer flooding development effectiveness, improves polymer flooding oil field recovery ratio further and provides technical support.
Background technology
Polymer flooding is the important method that domestic and international high water cut oil field improves oil recovery factor.Polymer solution significantly can improve oil and water mobility ratio after injecting stratum, reduces viscous fingering, reaches the object increasing swept volume, improve recovery ratio.It is that polymer flooding gathers the main source of altering passage that the non-homogeneity on stratum, intrinsic fracture and the height formed in long-term injecting water recovery process ooze the predominant pathway such as passage and macropore.Poly-existence of altering passage makes a large amount of polymer enter oil well along predominant pathway, seriously reduces the development effectiveness of polymer flooding.Solve the inefficient displacement problem of polymer, key is to detect to gather degree of altering and gather alters passage.
At present, the research of altering passage is gathered more about polymer flooding, the method of main employing has static analysis method and tracer method, but static analysis method mainly concentrates in the static parameters such as the non-homogeneity in oil field, moisture content and oil production, accurately can not reflect that the Development and Production of oil reservoir is dynamic, therefore judge that precision is low, actual utilizing status is poor, tracer method needs to carry out special test, costly and impact produce, be therefore necessary to set up a kind of poly-method for quick of altering passage.
Summary of the invention
Determine that gathering degree of altering in oil reservoir and gathering the type of altering passage is that polymer flooding oil field implements effect shutoff, improves the key of recovery efficiency technique further.The present invention, based on the Production development variation characteristic of polymer flooding oil field oil well, establishes and a set of gathering alters Air conduct measurement technology, provides technical support for improving polymer flooding development effectiveness, further raising polymer flooding oil field recovery ratio.
Terminological interpretation:
1, polymer flooding takes effect: after referring to that polymer solution injects stratum, and because oil and water mobility ratio reduces, swept volume increases, and compared with before poly-with note, after note is poly-, oil production increases.When note poly-after certain monthly oil production be greater than the poly-first trimester of note average monthly oil production time, think that polymer flooding takes effect this moment.
2, inject the pore volume injected of fluid: refer to and inject the volume of fluid and the ratio of voids volume, symbol adopts PV to represent.Such as reservoir pore volume V
0=10000m
3, inject fluid volume V=40000m
3, represent with PV and be exactly
The invention provides and a kind ofly gather the detection method of altering passage for polymer flooding, it utilizes to produce and poly-ly increases oily index characteristic curve and measure oil field, and concrete steps are:
(1) implement polymer flooding from oil field, the polymer concentration in the oil production of constant duration collected polymer displacing oil-field oil well, Liquid output and production fluid;
(2) calculate the product amount of polymers of oil well, namely produce poly-amount;
(3) from polymer flooding take effect and output polymer concentration calculate being greater than 0.015 times of injection of polymer concentration tired oil increment with tired produces to gather measure;
(4) ask the poly-amount of tired product and the logarithm of tired oil increment ratio, obtain producing the oily index of poly-increasing;
(5) product being gathered the oily index of increasing is ordinate, injects fluid pore volume injected for abscissa with oil field, does to produce and gathers the oily index characteristic curve of increasing;
Measure polymer flooding oil field according to the oily index characteristic tracing pattern of the poly-increasing of product and gather the degree of altering and poly-type of altering passage;
If described product is poly-increase oily index characteristic tracing pattern spill, then poly-degree of altering is weak, exists highly to ooze that type is poly-alters passage;
If described product is poly-increase oily index characteristic tracing pattern S shape, then poly-degree of altering is medium, has that mixed type is poly-alters passage;
If described product is poly-increase oily index characteristic tracing pattern convex, then poly-degree of altering is strong, has that macropore channel type is poly-alters passage.
The polymer concentration collected in the oil production of oil well, Liquid output and production fluid is the routine operation in the routine work of oil field, and the time, above-mentioned " constant duration " was preferably one month from polymer flooding is carried out in oil field.
Above-mentioned " producing the oily index of poly-increasing " is the poly-amount of tired product (N
p) and tired oil increment (N
o) logarithm of ratio, according to formula lg (N
p/ N
o), try to achieve and produce the oily index of poly-increasing.Product being gathered the oily index of increasing is ordinate, injects the pore volume injected of fluid for abscissa, mapping with oil field, obtains producing the oily index characteristic curve of poly-increasing.
Due to the impact of various uncertain factor, inevitably there is rough phenomenon in the tired oil increment obtained and the tired time dependent curve of poly-amount that produces, therefore needs to carry out smooth treatment to curve.Conventional smoothing method is least-squares regression approach, the method calculates simple, but due to error or artificial origin, it is unsane to return, and for making data smoothing have robustness, this patent adopts sane smooth treatment method to carry out smooth treatment to above-mentioned data, the method can see bibliography (Cui Dong. the processing method [J] that a kind of data are steadily and surely smooth. computer application, 2008,28 (7), 1678-1680).
Because polymer flooding gathers the existence of altering passage, the Production development in polymer flooding oil field can change, and this change is mainly reflected in polymer flooding and tires out the poly-amount of product with on the ratio of tired oil increment.In oil reservoir, the poly-passage of altering of different development degree can make the tired amount of gathering of producing present different Changing Patterns from the ratio of tired oil increment.
The present invention poly-increase oily exponential curve to produce and is characterized as and detects polymer flooding and gather the method for altering passage.The method is simple to operate, practical, provides technical support for improving polymer flooding development effectiveness, further raising polymer flooding oil field recovery ratio.
Accompanying drawing explanation
Fig. 1 is the oily index characteristic curve of the poly-increasing of product of oil well 1.
Fig. 2 is the oily index characteristic curve of the poly-increasing of product of oil well 2.
Fig. 3 is the oily index characteristic curve of the poly-increasing of product of oil well 3.
Detailed description of the invention
Describe the present invention in detail below in conjunction with specific embodiment, but do not limit practical range of the present invention.
The detection method of altering passage is gathered for Gudong field polymer flooding.This polymer flooding pilot test district oil area 1.24km
2, oil in place 277 × 10
4t, average effective caliper 12.3m, average pore 29.4%, average air permeability 1320 × 10
-3μm
2.The existing Injection Well of this this block of guide district 10 mouthfuls at present, by effect oil well 16 mouthfuls.
Gudong field is the oil field that a non-homogeneity is very strong, there is intrinsic fracture, high permeability zone and height and ooze passage in stratum.When carrying out polymer flooding volume increase, poly-phenomenon of altering is serious, and oil increasing effect is poor.
The present invention have selected 3 mouthfuls of wells to illustrate that polymer flooding gathers the practice situation of altering channel detection methods in Gudong field polymer flooding pilot test district.
Be below the oily index characteristic curve plotting step of the poly-increasing of product of oil well 1:
From the monthly production report of oil well 1, choose Liquid output, oil production and polymer concentration, calculate tired producing and gather amount (N
p) and tired oil increment (N
o); According to formula lg (N
p/ N
o), obtain producing the oily index of poly-increasing; The voids volume of record injection fluid from trial zone injection of polymer, to produce the oily index of poly-increasing for ordinate, to inject the pore volume injected of fluid for abscissa, mapping, obtains producing the oily index characteristic curve (see Fig. 1) of poly-increasing.
The oily index characteristic curve plotting step of the poly-increasing of product of other oil well is consistent with oil well 1.
The product of oil well 1 is poly-increases oily index characteristic curve (see Fig. 1) on the whole in obvious concave body, and according to detection method of the present invention, the poly-degree of altering of this mouthful of well is weak, exists highly to ooze that type is poly-alters passage.
The product of oil well 2 is poly-increases oily index characteristic curve (see Fig. 2) on the whole in obvious S body, and according to detection method of the present invention, the poly-degree of altering of this mouthful of well is medium, has that mixed type is poly-alters passage.
The product of oil well 3 is poly-increases oily index characteristic curve (see Fig. 3) on the whole in obvious convex shape, and according to detection method of the present invention, the poly-degree of altering of this mouthful of well is strong, has that macropore channel type is poly-alters passage.
This block well is when injection of polymer solution is produced, and drop into isotopic tracer and monitor, monitoring explanation results is consistent with testing result of the present invention.
Claims (3)
1. gather a detection method of altering passage for polymer flooding, it is characterized in that, utilize the oily index characteristic curve of the poly-increasing of product to measure polymer flooding oil field, comprising:
(1) implement polymer flooding from oil field, the polymer concentration in the oil production of constant duration collected polymer displacing oil-field oil well, Liquid output and production fluid;
(2) calculate the polymer output of oil well, namely produce poly-amount;
(3) from polymer flooding take effect and output polymer concentration calculate being greater than 0.015 times of injection of polymer concentration tired oil increment with tired produces to gather measure;
(4) the oily index of the poly-increasing of product is asked;
(5) to produce the oily index of poly-increasing for ordinate, the pore volume injected that fluid is injected in oil field is abscissa, mapping, obtains producing gathering increasing oily index characteristic curve;
Measure polymer flooding oil field according to the oily index characteristic tracing pattern of the poly-increasing of product and gather the degree of altering and poly-type of altering passage;
If described product is poly-increase oily index characteristic tracing pattern spill, then poly-degree of altering is weak, exists highly to ooze that type is poly-alters passage;
If described product is poly-increase oily index characteristic tracing pattern S shape, then poly-degree of altering is medium, has that mixed type is poly-alters passage;
If described product is poly-increase oily index characteristic tracing pattern convex, then poly-degree of altering is strong, has that macropore channel type is poly-alters passage.
2. a kind ofly as claimed in claim 1 gather the detection method of altering passage for polymer flooding, it is characterized in that, also comprise the tired oil increment obtained in (3) or tiredly produce the step that poly-amount and the relation curve of time carry out sane smooth treatment.
3. a kind ofly as claimed in claim 1 gather the detection method of altering passage for polymer flooding, it is characterized in that, produce that poly-to increase oily index be the tired logarithm producing poly-amount and tired oil increment ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510031288.3A CN104564049B (en) | 2015-01-22 | 2015-01-22 | Polymer flooding gathers the detection method of altering passage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510031288.3A CN104564049B (en) | 2015-01-22 | 2015-01-22 | Polymer flooding gathers the detection method of altering passage |
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| Publication Number | Publication Date |
|---|---|
| CN104564049A true CN104564049A (en) | 2015-04-29 |
| CN104564049B CN104564049B (en) | 2016-04-06 |
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ID=53081034
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|---|---|---|---|
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106055843A (en) * | 2016-07-01 | 2016-10-26 | 北京金士力源科技有限公司 | Quantitative analysis method and device of polymer production curve in polymer flooding process |
| CN109424349A (en) * | 2017-08-25 | 2019-03-05 | 中国石油天然气股份有限公司 | Fiber takes the acquisition methods and device of sand turning efficiency |
| CN112727413A (en) * | 2021-01-09 | 2021-04-30 | 西南石油大学 | Oil extraction method combining fine water injection and chemical combination flooding of complex fault block oil reservoir |
| CN113494263A (en) * | 2020-04-08 | 2021-10-12 | 中国石油化工股份有限公司 | Method for plugging water channeling crack of tight oil reservoir oil well, volume calculation method and device |
| CN114542007A (en) * | 2020-11-26 | 2022-05-27 | 中国石油天然气股份有限公司 | Method and device for plugging fluid channeling channel |
| CN114718531A (en) * | 2021-01-06 | 2022-07-08 | 中国石油天然气股份有限公司 | Perforation optimization method and device for improving accumulation-surface combination flooding effect of thick-layer sandstone reservoir |
| CN114718531B (en) * | 2021-01-06 | 2024-06-25 | 中国石油天然气股份有限公司 | Perforation optimization method and device for improving surface-aggregation compound flooding effect of thick-layer sandstone oil reservoir |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106055843A (en) * | 2016-07-01 | 2016-10-26 | 北京金士力源科技有限公司 | Quantitative analysis method and device of polymer production curve in polymer flooding process |
| CN106055843B (en) * | 2016-07-01 | 2019-05-14 | 北京金士力源科技有限公司 | A kind of poly- drive produces the quantitative analysis method and device of poly- curve in the process |
| CN109424349A (en) * | 2017-08-25 | 2019-03-05 | 中国石油天然气股份有限公司 | Fiber takes the acquisition methods and device of sand turning efficiency |
| CN113494263A (en) * | 2020-04-08 | 2021-10-12 | 中国石油化工股份有限公司 | Method for plugging water channeling crack of tight oil reservoir oil well, volume calculation method and device |
| CN114542007A (en) * | 2020-11-26 | 2022-05-27 | 中国石油天然气股份有限公司 | Method and device for plugging fluid channeling channel |
| CN114542007B (en) * | 2020-11-26 | 2024-03-26 | 中国石油天然气股份有限公司 | Method and device for plugging cross flow channel |
| CN114718531A (en) * | 2021-01-06 | 2022-07-08 | 中国石油天然气股份有限公司 | Perforation optimization method and device for improving accumulation-surface combination flooding effect of thick-layer sandstone reservoir |
| CN114718531B (en) * | 2021-01-06 | 2024-06-25 | 中国石油天然气股份有限公司 | Perforation optimization method and device for improving surface-aggregation compound flooding effect of thick-layer sandstone oil reservoir |
| CN112727413A (en) * | 2021-01-09 | 2021-04-30 | 西南石油大学 | Oil extraction method combining fine water injection and chemical combination flooding of complex fault block oil reservoir |
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