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Oil-water well self-accumulation and sand prevention construction method

A construction method and technology for oil and water wells, which are used in chemical instruments and methods, earthwork drilling, wellbore/well components, etc., can solve the problems of poor sand consolidation effect and limited sand control size, and ensure the sand control and consolidation effect. , The effect of maintaining permeability and material cleanliness

Active Publication Date: 2019-11-15
青岛大地新能源技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a self-accumulation sand control construction method for oil-water wells in order to solve the problems of limited sand control size and poor sand consolidation effect in the current sand control technology. The purpose of self-accumulation sand control of oil-water well formation sand and gravel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The construction method for self-accumulation sand control of oil-water wells includes the following steps:

[0040](1) Pre-treatment of oil and water wells: perforating, flushing and dredging of oil and water wells; ① perforation is negative pressure perforation, the hole density is 32 holes / m, and the hole diameter is 10mm; ② Well cleaning is traditional oil well cleaning method, such as adding a solid-free clean liquid containing clay expansion agent and anti-emulsifier; ③ well drilling: use a drift gauge smaller than the inner diameter of the casing 3mm to drill to 18-30m below the lower limit of the oil layer without encountering resistance .

[0041] (2) On-site dosing: prepare self-polymerizing liquid, self-polymerizing auxiliary agent and cementing liquid respectively on the spot; 1. zeninin is placed in water, stirred for 15 minutes, and it is 8% zeninin aqueous solution that is mixed with mass percentage concentration, That is obtained from the poly solution;...

Embodiment 2

[0052] The construction method for self-accumulation sand control of oil-water wells includes the following steps:

[0053] (1) Pre-treatment of oil and water wells: perforating, flushing and dredging of oil and water wells; ① perforation is negative pressure perforation, with a hole density of 20 holes / m and a diameter of 12mm; ② Well cleaning is traditional oilfield well cleaning method, such as adding a solid-free clean liquid containing clay expansion agent and anti-emulsifier; ③ well drilling: use a drift gauge less than 5mm in the inner diameter of the casing to drill to 18-30m below the lower limit of the oil layer without encountering resistance .

[0054] (2) On-site liquid preparation: prepare self-polymerizing liquid, self-polymerizing auxiliary agent and cementing liquid respectively on the spot; 1. place xylan in water, stir for 25 minutes, and prepare an aqueous solution of xylan whose mass percent concentration is 5%, That is obtained from the poly solution; ②P...

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Abstract

The invention belongs to the technical field of petroleum reservoir exploitation, and particularly relates to an oil-water well self-accumulation and sand prevention construction method. The oil-waterwell self-accumulation and sand prevention construction method includes the following steps that (1) an oil-water well is processed in the early stage; (2) site fluid preparation is conducted, specifically, self-accumulation fluid, a self-accumulation assistant and consolidating fluid are prepared correspondingly on site; and (3) squeezing into is conducted. According to the method, through the construction method by injecting different chemical reagents in sections, the purposes of oil-water well formation gravel self-accumulation and sand prevention are achieved.

Description

technical field [0001] The invention belongs to the technical field of oil reservoir development, and in particular relates to a construction method for self-accumulation and sand control of oil-water wells. Background technique [0002] In the development of sandstone reservoirs, the phenomenon of sand production in oil and water wells is becoming more and more common. At the same time, sand production will reduce the permeability of the formation and affect the production of oil wells. can not work. The sand production of oil and water wells will make the oil and water wells unable to work normally, and has become an important factor restricting the development level of oil fields. At present, the sand production methods of oil and water wells are mainly mechanical sand control and chemical sand control. [0003] For the mechanical sand control method, as described in Chinese patent CN106761590A, through the multi-slug high-density packing sand control process, the sand c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/02C09K8/56C09K8/57C09K8/575
CPCC09K8/56C09K8/572C09K8/5755C09K8/5758E21B43/025
Inventor 张殿印史胜龙温庆志张东晓
Owner 青岛大地新能源技术研究院
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