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Circulation method for well washing of water injection well

A technology for water injection wells and well flushing, which is applied in the direction of flushing boreholes, boreholes/well components, and earthwork drilling and production, and can solve problems such as single well flushing standards and lack of well flushing methods

Inactive Publication Date: 2019-05-17
PETROCHINA CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the problems of the traditional well-washing method in the background technology, such as the single well-washing standard and the lack of pertinence of the well-washing method, and provide a circulation method for water injection well flushing. The circulation method can apply different parameters for different water injection well conditions and well-washing purposes, so as to ensure that the well-washing is more targeted and improve the quality of well-washing

Method used

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  • Circulation method for well washing of water injection well
  • Circulation method for well washing of water injection well
  • Circulation method for well washing of water injection well

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with accompanying drawing:

[0029] The circulation method for flushing the water injection well comprises the following steps:

[0030] 1. Compared with the original well flushing method, the well flushing conditions and purposes of the water injection wells are classified in detail;

[0031] Well condition classification: water injection well flushing is divided into well opening after drilling control, well flushing before testing, conventional well flushing, oil production well, casing transformation well, sand production well, under-injection time > 180 days, under-injection time ≤ 180 days 9 types of well washing before days and measures;

[0032] The purpose of well cleaning is to classify the well cleaning of water injection wells into two categories: cleaning the wellbore and removing pollution near the well.

[0033] 2. According to different reasons for well flushing, optimize different fl...

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Abstract

The invention relates to a circulation method for well washing of a water injection well, and mainly aims to solve the problems that the existing traditional well washing manner is single in well washing standard and lacks pertinence. The circulation method is characterized by comprising the following steps: (1) classifying well washing conditions and purposes of well washing of the water injection well in details, wherein the step is added to an original well washing method; (2) optimizing well washing pressure, well washing delivery capacity and well washing solution amount for well washingbased on different reasons; (3) determining whether a dropping-fishing operation is needed. According to the circulation method, the well is washed by applying different parameters according to the different well washing conditions and purposes, so that the well washing is more targeted, and the well washing quality is improved.

Description

technical field [0001] The invention relates to the technical field of oil production and development, in particular to a circulation method for flushing a water injection well. Background technique [0002] The water injection quality of water injection wells directly affects the development effect of water flooding oil fields. As a guarantee measure to ensure good water injection in water injection wells, well flushing of water injection wells plays an important role in daily maintenance and management. How to ensure the quality of well flushing is to ensure good injection of water injection wells The key to water. As far as the traditional well washing methods are concerned, firstly, the well washing standards are single, the method is general, and the well washing methods are not targeted. In the well washing construction, different water injection wells should be washed with the same method parameters, and the well conditions of different water injection wells are not a...

Claims

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Application Information

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IPC IPC(8): E21B21/00E21B21/08
Inventor 刘洪军张柏曹鼎洪许万利倪玉伟李波高立峰韩文超侯志东王德晴
Owner PETROCHINA CO LTD
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