CN1944955A - Electric detection identifying method for sand stone oil field oil layer lower water flooded oil layer during high water content developing period - Google Patents
Electric detection identifying method for sand stone oil field oil layer lower water flooded oil layer during high water content developing period Download PDFInfo
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- CN1944955A CN1944955A CN 200610150966 CN200610150966A CN1944955A CN 1944955 A CN1944955 A CN 1944955A CN 200610150966 CN200610150966 CN 200610150966 CN 200610150966 A CN200610150966 A CN 200610150966A CN 1944955 A CN1944955 A CN 1944955A
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Abstract
The electrically low water flooding oil layer measuring and identifying method for sandstone oil field in developing period belongs to the field of petroleum extracting technology. The method of the present invention includes the following steps: 1. defining a low water flooding grade based on the current water saturation SW and the water saturation difference DSW: SW 40-50 % and DSW 20-30 %, where DSW=SW-SWb, with SWb being the original water saturation; and 2. electrically measuring and identifying the low water flooding oil layer with relatively higher resistance. The present invention marks off a low water flooding grade to favor to extracting residual oil.
Description
Technical field
The invention belongs to field of petroleum exploitation, relate to a kind of electric detection identifying method of sandstone oil field reservoir water flooding situation.
Background technology
At present sandstone oil field reservoir water flooding situation generally use high, medium and low, four ranks are not described, the discrimination standard of low water logging wherein is 10%≤S
W≤ 40% (S
WCurrent water saturation), 12%≤Δ S
W≤ 24% (Δ S
WCurrent water saturation and original water saturation poor).This standard also is not suitable for the oil field development of high water-cut stage, is mainly reflected in the following aspects:
1, at present the reservoir engineer it has been generally acknowledged that in the water flooded grade low, water logging is not a remaining oil, middle and high water logging is a non-residue oil.The oil field enters into the high water-cut development after date, and the crude oil that can migrate to oil well under the condition that displacing agent promotes all should be remaining oil.Therefore all contain remaining oil in the middle and high waterflooded reservoir.
2, the oil field enters into after the high water-cut development period, along with remaining oil exploitation difficulty strengthens and to the reduction of development well perforation moisture requirement of initial stage, the moisture lower middle waterflooded reservoir of a part is dropped into perforation, part moisture on the low side like this in the water logging still can be used as the remaining oil under the water drive condition, it therefrom should be separated in the water logging.
3, present Water Flooding Layer on the low side and the middle water flooded grade explanation that mixes is easily penetrated high aquifer when perforation together by mistake, causes perforation initial stage height moisture.
Summary of the invention
In order to solve existing standard and not to be suitable for the oil field development of high water-cut stage, the present invention has carried out deep research to the problems referred to above, a kind of electric detection identifying method of sand stone oil field oil layer lower water flooded oil layer during high water content developing period is provided, this method improvement water flooded grade standard on the low side and recognition methods.Concrete standard is as follows:
1, the moisture standard modification with water flooded grade on the low side is: 40%≤S
W≤ 50%; 20%≤Δ S
W≤ 30%;
In the formula: S
W-current water saturation;
S
Wb-original water saturation;
Δ S
W-water saturation is poor.ΔS
W＝S
W-S
Wb。
2, the electric detection identifying method of waterflooded reservoir on the low side: therefrom the part that resistivity is high is divided into water logging on the low side and gets final product in the water logging electrical measurement feature.
The water flooded grade on the low side that method of the present invention marks off helps the remaining oil of oil field high water-cut stage and taps the latent power.Utilized this method to decrease in the perforation programming of district's offset well and use at recover the oil three infill wells of BLOCK OF LAMADIAN OIL FIELD of six factories and 7-30 cover of Daqing Oil Field Co., Ltd in 2006, effect is obvious.Two blocks are being guaranteed under the perfect condition of injection-production relation average individual well day about 10 tons of produce oils, and the initial stage is moisture to be had only about 80%, has avoided the high moisture of perforation initial stage, has created considerable economic.
The specific embodiment
The specific embodiment one: present embodiment is carried out electrical measurement identification to sand stone oil field oil layer lower water flooded oil layer during high water content developing period as follows:
One, water flooded grade is divided:
Original scheme water flooded grade criteria for classifying:
Not water logging: 0.0%≤S
W≤ 10%; 0.0%≤Δ S
W≤ 12%;
Low water logging: 10%＜S
W≤ 40%; 12%＜Δ S
W≤ 24%;
Middle water logging: 40%＜S
W≤ 80%; 24%＜Δ S
W≤ 36%;
High water logging: S
W＞80%; Δ S
W＞36%.
Present embodiment with high, medium and low, not 4 ranks be subdivided into extra-high-speed, height, in, on the low side, low and 6 ranks not, concrete condition is as follows:
Not water logging: 0.0%≤S
W≤ 10%; 0.0%≤Δ S
W≤ 10%;
Low water logging: 10%≤S
W≤ 40%; 10%≤Δ S
W≤ 20%;
Water logging on the low side: 40%≤S
W≤ 50%; 20%≤Δ S
W≤ 30%;
Middle water logging: 50%≤S
W≤ 80%; 30%≤Δ S
W≤ 40%;
High water logging: 80%≤S
W≤ 90%; 40%≤Δ S
W≤ 45%;
Extra-high-speed water logging: S
W〉=90%; Δ S
W〉=45%.
The symbol lexical or textual analysis:
Current water saturation: S
W
Original water saturation: S
Wb
Water saturation is poor: Δ S
W=S
W-S
Wb
Two, the electric detection identifying method of waterflooded reservoir on the low side: therefrom the part family that resistance is high is divided into water logging on the low side and gets final product in the water logging electrical measurement feature.Generally speaking, the resistivity of middle water logging is generally 25～40 ohm meters, and the resistivity of Water Flooding Layer on the low side is generally 30～40 ohm meters.
Generally speaking, in waterflooded reservoir determine be with the electrical measurement feature of not water logging, low waterflooded reservoir relatively and come, after the waterflooded reservoir, be that the part of 30～40 ohm meters marks again with this resistivity reservoir on the basis of original Water Flooding Layer interpretation technique, identifying, that's all.
Claims (3)
1, a kind of electric detection identifying method of sand stone oil field oil layer lower water flooded oil layer during high water content developing period is characterized in that described method is:
The water quality standard that contains of a, definition water flooded grade on the low side is: 40%≤S
W≤ 50%; 20%≤Δ S
W≤ 30%;
In the formula: S
W-current water saturation;
S
Wb-original water saturation;
Δ S
W-water saturation is poor, Δ S
W=S
W-S
Wb
The electric detection identifying method of b, waterflooded reservoir on the low side: therefrom the part family that resistance is high is divided into water logging on the low side and gets final product in the water logging electrical measurement feature.
2, the electric detection identifying method of sand stone oil field oil layer lower water flooded oil layer during high water content developing period according to claim 1, the resistivity of water logging is 25～40 ohm meters in it is characterized in that.
3, the electric detection identifying method of sand stone oil field oil layer lower water flooded oil layer during high water content developing period according to claim 1, the resistivity that it is characterized in that Water Flooding Layer on the low side is 30～40 ohm meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610150966 CN1944955A (en) | 2006-10-31 | 2006-10-31 | Electric detection identifying method for sand stone oil field oil layer lower water flooded oil layer during high water content developing period |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610150966 CN1944955A (en) | 2006-10-31 | 2006-10-31 | Electric detection identifying method for sand stone oil field oil layer lower water flooded oil layer during high water content developing period |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1944955A true CN1944955A (en) | 2007-04-11 |
Family
ID=38044529
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610150966 Pending CN1944955A (en) | 2006-10-31 | 2006-10-31 | Electric detection identifying method for sand stone oil field oil layer lower water flooded oil layer during high water content developing period |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102041995A (en) * | 2010-12-02 | 2011-05-04 | 中国海洋石油总公司 | System for monitoring complicated oil deposit flooding conditions |
| CN104806231A (en) * | 2014-01-27 | 2015-07-29 | 中国石油化工股份有限公司 | Quantitative evaluation method of heavy oil steam stimulation water flooded layer |
-
2006
- 2006-10-31 CN CN 200610150966 patent/CN1944955A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102041995A (en) * | 2010-12-02 | 2011-05-04 | 中国海洋石油总公司 | System for monitoring complicated oil deposit flooding conditions |
| CN102041995B (en) * | 2010-12-02 | 2013-06-19 | 中国海洋石油总公司 | System for monitoring complicated oil deposit flooding conditions |
| CN104806231A (en) * | 2014-01-27 | 2015-07-29 | 中国石油化工股份有限公司 | Quantitative evaluation method of heavy oil steam stimulation water flooded layer |
| CN104806231B (en) * | 2014-01-27 | 2017-07-07 | 中国石油化工股份有限公司 | The method for quantitatively evaluating of thickened oil steam-stimulated Water Flooding Layer |
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