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Modified oilfield acid regulation integrated technique

An improved and acid-regulating technology, applied in the fields of production fluids, wellbore/well components, earth-moving drilling, etc., can solve the problems of high cost, high risk, rising water injection pressure, etc. Simple and effective in improving oil displacement efficiency

Inactive Publication Date: 2016-02-03
天津立坤石油技术服务有限公司
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Problems solved by technology

[0004] In order to overcome the problems of complex operation, high risk, high cost and low efficiency of the existing construction technology, this invention adopts the integrated technology of profile control and acidification synergy, which not only solves the problem of water breakthrough in high permeability layer, but also starts low permeability layer, to avoid the water injection pressure rising too high after construction, can achieve the effect of "blocking but not dead", and solve the problem that high-pressure wells cannot meet injection requirements after single profile control

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  • Modified oilfield acid regulation integrated technique
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Embodiment Construction

[0019] Embodiments of the present invention will be specifically described below.

[0020] Well Jia 37-53 is a water injection well in the Guan 128 fault block of Shenjiapu Oilfield. After re-injection, the water injection layer is Zaowu, benefiting 3 oil wells. From the water absorption profile of the well, the No. 20 and No. 21 sublayers have always absorbed water strongly, and the relative water absorption of the two layers has reached nearly 70%, which shows that there is a certain contradiction between layers in the vertical direction. Judging from the injection-production relationship of this well group, the corresponding relationship between the main oil layers is good, and the injection-production corresponding rate reached 86%. Production dynamic response Oil well Jia 37-54 has obvious effects of water injection, but the water content of this well has gradually increased from 60% in the initial stage to 85% at present, and the production decline has increased. Jia 37...

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Abstract

The invention discloses a modified oilfield acid regulation integrated technique and aims to provide an oilfield deep profile controlling and flooding technique which allows continuous construction, fewer moving string steps, simple process, low risk and low cost. The acid regulation integrated technique is continuously carried out for construction according to a sequence of temporary plugging process, acid regulation process and profile regulation process. The technique also comprises a cleaner injection process. The technique is suitable for water injection wells, having great inter-reservoir differences, non-uniform inter-reservoir suction profiles, low water injection pressure with high water injection quantity, and severe injected water rush in high permeable layers.

Description

technical field [0001] The invention relates to an oilfield production technology, in particular to an improved integrated oilfield acid adjustment technology. Background technique [0002] In the late stage of oilfield development, due to long-term water injection development, the physical properties of oil layers are greatly different, the heterogeneity is serious, and the contradiction between layers is gradually intensified. After a single profile control is used to block the high-permeability water-exuding layer, the low-permeability layer often fails to start, causing the water injection pressure to rise again; while the single acidification may make the high-permeability layer more serious when the low-permeability layer is unblocked, increasing the The contradiction between the layers has increased. [0003] Chinese patent (publication number CN1423029A) discloses an oilfield water injection profile control and growth technology process. After the conventional profi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13E21B43/27
Inventor 李海坤
Owner 天津立坤石油技术服务有限公司
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