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A method for oil well stimulation by combination of gel foam and in-situ microemulsion

A technology of gel foam and microemulsion, which is applied to drilling compositions, chemical instruments and methods, earthwork drilling and production, etc. It can solve the problem of oil well increase effect, cannot improve the efficiency of water flooding and expand the swept volume and other problems, to achieve the effect of strong ability to solubilize crude oil, strong effect and obvious effect

Active Publication Date: 2020-04-10
南阳忠兴石油工程技术服务有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the application of nitrogen foam system (nitrogen foam, polymer-enhanced foam, gel-enhanced foam) is still only to expand the swept volume, and cannot improve the oil washing efficiency of water flooding, and the oil increase effect of the treated oil well is affected

Method used

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  • A method for oil well stimulation by combination of gel foam and in-situ microemulsion
  • A method for oil well stimulation by combination of gel foam and in-situ microemulsion
  • A method for oil well stimulation by combination of gel foam and in-situ microemulsion

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Embodiment Construction

[0026] The following examples further illustrate the content of the present invention, but should not be construed as limiting the present invention. Without departing from the spirit and essence of the present invention, any modifications or substitutions made to the methods, steps or conditions of the present invention fall within the scope of the present invention.

[0027] 1. Field effect of combined application of gel nitrogen foam system and in-situ microemulsion system slug

[0028] There are many types of edge water and bottom water reservoirs in Jidong Nanpu Oilfield of PetroChina, and the reservoir heterogeneity is serious. Due to water channeling, edge water immersion and bottom water coning, the water cut of oil wells rises sharply in the early stage of natural energy opening of the oilfield. Seriously affect the oilfield development effect. The reservoir and development parameters of the oil well in the present invention are reservoir temperature of 50-100°C, por...

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Abstract

The invention discloses a method for increasing the yield of an oil well through combined application of gel foam and in-situ micro-emulsion. The method comprises the following steps: injecting a pre-built nitrogen section plug, a gel nitrogen foam section plug, a polymer nitrogen foam section plug, an in-situ micro-emulsion section plug and a gel nitrogen foam section plug sequentially into the oil well. According to the method disclosed by the invention, the yield of crude oil of the oil well can be greatly improved, and the water output of the oil well can be reduced.

Description

technical field [0001] The invention belongs to the technical field of oilfield development and oil well stimulation, and in particular relates to a method for oil well stimulation by combining gel foam and in-situ microemulsion. Background technique [0002] Water production from oil wells is a common problem in oilfield development. Due to the heterogeneity of the reservoir and the further aggravation of the heterogeneity due to long-term water flooding, as well as the difference in fluid mobility and other reasons (such as operation failure, wrong production measures, etc.), high-permeability channels or large pores are gradually formed in the oil layer. The streamline field of the formation forms a fixed position, and the dominant channel of water flow is formed between oil and water wells, which in turn leads to water coning, water channeling, and water fingering, so that some oil wells will see water or flood out prematurely, and water flooding will be inefficient or i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/512C09K8/518C09K8/584C09K8/60E21B43/22
CPCC09K8/512C09K8/518C09K8/584C09K8/604E21B43/16
Inventor 牛朝兴彭航兵孔柏岭桑涛
Owner 南阳忠兴石油工程技术服务有限公司
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