CN1944954A - Fine divided describing method for sandstone oil field oil layer water flooded grade during high water content developing period - Google Patents
Fine divided describing method for sandstone oil field oil layer water flooded grade during high water content developing period Download PDFInfo
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- CN1944954A CN1944954A CN 200610150965 CN200610150965A CN1944954A CN 1944954 A CN1944954 A CN 1944954A CN 200610150965 CN200610150965 CN 200610150965 CN 200610150965 A CN200610150965 A CN 200610150965A CN 1944954 A CN1944954 A CN 1944954A
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Abstract
The subdivision oil layer water flooding grade description method for high water content sandstone oil field in developing period belongs to the field of petroleum extracting technology. The present invention sets six water flooding grades based on the water saturation SW and the water saturation difference DSW, including no water flooding with SW 0.0-10 % and DSW 0.0-10 %, very low water flooding with SW 10-40-% and DSW 10-20 %, low water flooding with SW 40-50 % and DSW 20-30 %, middle water flooding with SW 50-80 % and DSW 30-40 %, high water flooding with SW 80-90 % and DSW 40-45 %, and very high water flooding with SW higher than 90 % and DSW higher than 45 %. The present invention marks off a low water flooding grade for extracting residual oil and a very high water flooding grade for controlling ineffective extraction.
Description
Technical field
The invention belongs to technical field of petroleum extraction.
Background technology
At present sandstone oil field reservoir water flooding situation generally use high, medium and low, four ranks are not described, and are low, water flooded grade is not a remaining oil, high, middle water flooded grade is a non-residue oil, this method is to the residue oil classification and to describe be static.And in fact under the production technique condition in present oil field, the analysis of remaining oil should be dynamic.This describing method also is not suitable for the oil field development of ultra-high water cut stage, is mainly reflected in the following aspects:
1, to describe the division of rank (high, medium and low, not) be for satisfying the moisture lower situation design in oil field in original four water loggings.Along with the progress of moisture rising in oil field and production technique, the oil field development technology is meticulous gradually, makes original four water loggings describe rank and adapts to inadequately.
2, along with the oil field development development of technology, make the moisture relatively lower oil reservoir of a part also can carry out the perforation exploitation as remaining oil, make the moisture lower middle water flooded grade oil reservoir of a part can drop into exploitation, and original water flooded grade is not told this rank in dividing yet;
3, along with the oil field enters into high water-cut development period, the moisture further rising of oil reservoir, even formed invalid notes and adopt circulation layer.Adopt in order to control invalid notes, need in high water flooded grade, further mark off the extra-high-speed water flooded grade, promptly discern invalid notes and adopt circulation layer.And original water flooded grade is not told this rank in dividing, and can not discern invalid notes and adopt circulation layer.
Summary of the invention
Because existing standard also is not 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 fine divided describing method of sandstone oil field oil layer water flooded grade during high water content developing period is provided, this method 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 standard 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
The water flooded grade on the low side that the present invention marks off helps the remaining oil of oil field high water-cut stage taps the latent power, and division extra-high-speed water flooded grade helps controlling invalid notes high moisture period and adopts.The reservoir water flooding rank describing method that the present invention proposes obtains to use in BLOCK OF LAMADIAN OIL FIELD.2006, utilize this water flooded grade to divide and recognition result, in decreasing the perforation programming of district's offset well, three infill wells and 7-30 cover use, and effect is obvious.Two blocks are penetrated extra-high-speed water logging section thickness proportion and are accounted for more than 25% of whole perforation ratio guaranteeing on average to keep away under the perfect condition of injection-production relation.Reduce in the individual well daily water-injection rate under 2/3 the situation, average individual well day about 10 tons of produce oils, the initial stage is moisture to be had only about 80%, has controlled invalid notes from the source and has adopted circulation, has avoided the high moisture of perforation initial stage, has created considerable economic.
The specific embodiment
The specific embodiment one: present embodiment changes original water flooded grade criteria for classifying.
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 standard 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
The difference of the water flooded grade of present embodiment and original scheme water flooded grade criteria for classifying is as follows:
1, increases by 2 of water flooded grades: water logging on the low side and extra-high-speed water logging (macropore);
2, water saturation is told 40%＜S
W≤ 50% and S
W＞90% two rank;
3, the water saturation difference goes out 20%＜Δ S
W≤ 30% and Δ S
W＞45% two rank.
The specific embodiment two: present embodiment is an example with the Daqing Oilfield Company BLOCK OF LAMADIAN OIL FIELD, 2006, utilize the specific embodiment one described water flooded grade division methods, use in the perforation programming of BLOCK OF LAMADIAN OIL FIELD northeast block poor efficiency, invalid cyclic test district and 7-30 cover damage district offset well, effect is obvious.Two blocks are penetrated extra-high-speed water logging section thickness proportion and are accounted for more than 25% of whole perforation ratio guaranteeing on average to keep away under the perfect condition of injection-production relation.Reduce in the individual well daily water-injection rate under 2/3 the situation, average individual well day about 10 tons of produce oils, the initial stage is moisture to be had only about 80%.
Claims (1)
1, the fine divided describing method of sandstone oil field oil layer water flooded grade during high water content developing period, it is characterized in that described method set extra-high-speed, height, in, on the low side, low and 6 ranks not, concrete standard 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%;
Wherein:
Current water saturation: S
W
Original water saturation: S
Wb
Water saturation is poor: Δ S
W=S
W-S
Wb
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610150965 CN1944954A (en) | 2006-10-31 | 2006-10-31 | Fine divided describing method for sandstone oil field oil layer water flooded grade during high water content developing period |
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| CN 200610150965 CN1944954A (en) | 2006-10-31 | 2006-10-31 | Fine divided describing method for sandstone oil field oil layer water flooded grade during high water content developing period |
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| CN1944954A true CN1944954A (en) | 2007-04-11 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942995A (en) * | 2010-09-16 | 2011-01-12 | 中国石油天然气股份有限公司 | Method for evaluating watered-out degree of ultralow-permeability water-drive reservoir sandstone oil layer |
| CN103670390A (en) * | 2013-12-20 | 2014-03-26 | 中国石油天然气集团公司 | Water flooded layer well logging evaluation method and system |
| 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 |
| CN111236934A (en) * | 2020-02-25 | 2020-06-05 | 中国石油大学(北京) | Method and device for determining flooding level |
-
2006
- 2006-10-31 CN CN 200610150965 patent/CN1944954A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942995A (en) * | 2010-09-16 | 2011-01-12 | 中国石油天然气股份有限公司 | Method for evaluating watered-out degree of ultralow-permeability water-drive reservoir sandstone oil layer |
| CN101942995B (en) * | 2010-09-16 | 2012-11-14 | 中国石油天然气股份有限公司 | Method for evaluating watered-out degree of ultralow-permeability water-drive reservoir sandstone oil layer |
| CN103670390A (en) * | 2013-12-20 | 2014-03-26 | 中国石油天然气集团公司 | Water flooded layer well logging evaluation method and system |
| CN103670390B (en) * | 2013-12-20 | 2016-06-08 | 中国石油天然气集团公司 | A kind of logging in water flooded layer evaluation methodology and system |
| 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 |
| CN111236934A (en) * | 2020-02-25 | 2020-06-05 | 中国石油大学(北京) | Method and device for determining flooding level |
| CN111236934B (en) * | 2020-02-25 | 2021-10-08 | 中国石油大学(北京) | Method and device for determining flooding level |
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