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Sand prevention construction technology

A kind of construction technique and technology, which is applied in the direction of production fluid, wellbore/well components, earthwork drilling and production, etc. It can solve the problems of poor sand control effect, difficult extraction of tubing, and locked sand control string, so as to achieve difficult extraction, Improve the sand control effect and avoid the effect of being locked

Active Publication Date: 2021-05-04
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the related art, the coated sand in the sand-carrying liquid pumped from the tubing may return upward with the sand-carrying liquid, and the coated sand that goes up may lock the sand control string during consolidation, making it difficult to pull out the tubing. Poor sand control effect

Method used

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  • Sand prevention construction technology
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Embodiment Construction

[0043] In order to make the technical solutions and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below.

[0044] It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein.

[0045] The embodiment of the present application provides a sand control construction technology, see figure 1 , the process includes:

[0046] Step 101: Measure the water absorption of the first layer of the target well to obtain the first volume, and measure the water absorption of the second la...

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Abstract

The invention discloses a sand prevention construction technology, and belongs to the technical field of petroleum engineering. The sand prevention construction technology comprises the steps that the water absorption capacity of a first layer and the water absorption capacity of a second layer are measured in advance, and the first volume and the second volume are correspondingly obtained; then pressure testing is carried out on a casing pipe and an oil pipe, and after the pressure testing is qualified, sand-carrying fluid of the second volume is pumped into the second layer from the oil pipe; and a replenisher of the first volume is pumped from the casing pipe to the first layer, the first layer is located above the second layer. The replenisher can replenish the pressure of the first layer leaked above the second layer, the remaining replenisher moves downwards to prevent the sand-carrying fluid pumped from the oil pipe from returning upwards, so that first precoated sand and second precoated sand in the sand-carrying fluid are prevented from returning upwards along with the sand-carrying fluid, the situation that a sand prevention pipe column is locked and the oil pipe is not easy to pull out is avoided, and the sand prevention effect is improved.

Description

technical field [0001] This application relates to the technical field of petroleum engineering. In particular, it relates to a sand control construction technique. Background technique [0002] In the process of oil extraction, sand production often occurs in oil and water wells. Sand production not only easily causes problems such as failure of the oil well pump and buried oil layer by sand, but also causes deformation of the casing due to the collapse of the bottom layer in serious cases, resulting in the scrapping of the tubing and the shutdown of the oil and water well. Therefore, when sand production occurs in oil and water wells, sand control measures need to be taken. [0003] In the related art, during sand control construction, a sand control string is lowered, and the sand control string includes oil pipes and other components. The sand-carrying liquid is pumped from the oil pipe, and the coated sand is carried in the sand-carrying liquid. Under the action of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/02
CPCE21B43/02
Inventor 江淑丽李进光韩羽李高峰安淑凯张光军张明明董旭陈善峰
Owner PETROCHINA CO LTD
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