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Technique for dissecting depth of sludge containing oil in injection well

A technology for water injection wells and oily sludge, which is applied in wellbore/well parts, production fluid, earthwork drilling and production, etc. It can solve the lack of treatment and comprehensive utilization measures for oily sludge, affect the oilfield production effect, and cannot utilize oily sludge and other issues, to achieve the effect of improving the mining effect, good social and economic benefits, and easy implementation

Inactive Publication Date: 2004-03-10
PETROCHINA CO LTD
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AI Technical Summary

Problems solved by technology

At present, there is a lack of good treatment and comprehensive utilization measures for oily sludge on site. The main treatment methods are incineration or landfill. In this way, not only can oily sludge not be used, but it is easy to cause environmental pollution
At the same time, due to the heterogeneity of oil wells and the existence of conflicts between layers, water channeling often occurs in reservoir water injection development. The injected water is mainly absorbed by high-permeability oil layers and bursts in them, which seriously affects the oilfield production effect. Lack of good profile control agent and profile control technology to adjust the water injection profile to improve the water injection situation and improve the production effect of layered reservoirs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1： preparation ：0.3755m3，5m3，，0.25、0.0875、0.3、0.1875，；：4， no. 1 ，、100m3， no. 2 no. 3 no. 4 ，150m3，100m3，260m3。1210m3，， to effect 。 Embodiment 2

[0008] Embodiment 1: Preparation of oily sludge profile control agent: get 0.375 tons of dispersant and add 5m 3 Stir evenly in the oily sludge, add 5m by self-priming pump 3 Composite anion resin, and stir evenly, add 0.25 tons of polyacrylamide, 0.0875 tons of crosslinking agent, 0.3 tons of stabilizer, and 0.1875 tons of retarder in sequence using the jet mixing funnel, and stir evenly; inject profile control agent: to a water injection well Inject 4 main slugs one by one. In the first main slug, the sludge slug and resin slug are each 100m 3 , in the second, third and fourth main slugs, the sludge slug is 150m 3 , the resin slug is 100m 3 , and finally injected gel slug 260m 3 . A total of 1210m of oily sludge profile control agent was injected into the water injection well according to the prescribed procedures. 3 The oil production of the oil wells in the rear well group increased, and the water cut decreased, showing good results. Embodiment 2: According to the sa...

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Abstract

A deep section regulating technique for regulating the water absorbing section of water injection well features that its section regulating agent is prepared from the additive and oil-contained sludge which has high compatibility to stratum. Its advantage is high plugging effect to high penetration stratum.

Description

Technical field: [0001] The invention relates to a technical method for improving the water injection development effect of an oil field, which belongs to the field of oil field chemistry and oil recovery technology. Background technique: [0002] Oily sludge is industrial waste generated during oil field production. At present, there is no good treatment and comprehensive utilization measures for oily sludge on site. The main treatment methods are incineration or landfill. In this way, not only can oily sludge not be used, but it is easy to cause environmental pollution. At the same time, due to the existence of heterogeneity and interlayer contradictions in oil wells, water channeling often occurs in reservoir water injection development. The injected water is mainly absorbed by high-permeability oil layers and bursts in them, which seriously affects oilfield production. There is a lack of good profile control agents and technology to adjust the water injection profile to...

Claims

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Application Information

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IPC IPC(8): E21B33/13E21B43/20
Inventor 李金峰马云池肖立新尹华郭晓光郑文梅王英秦琴才艳杰
Owner PETROCHINA CO LTD
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