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A high-strength and high-permeability sand control casing

A high-permeability, high-strength technology, used in casing, drill pipe, earth-moving drilling, etc., can solve the problems of high cost, unsuitable wellbore sand control, low strength, etc., to achieve good stability, avoid strength and conductivity. Reduced flow capacity, high-intensity effects

Active Publication Date: 2015-09-16
BEIJING RECHSAND SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the traditional fracturing proppant is granular, which is only suitable for filling the rock formation gap under the closing pressure, and is not suitable for sand control around the wellbore wall. In view of the high cost and low strength of the traditional fracturing proppant, if the traditional granular If the simple structural change of the fracturing proppant is to be used for sand control around the borehole wall, it is necessary to comprehensively consider its multiple performance requirements such as curing formability, high strength, and high oil permeability and water resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The high-strength and high-permeability sand control casing provided in this embodiment includes a pipe body, which is suitable for being inserted around the well wall. The resin on the surface of the quartz sand particles, the polythiol curing agent used to solidify the resin (produced by Corning Chemical China Co., Ltd., the model is Capcure3-800, at present, this company has been acquired by BASF), adding In the resin, a silane coupling agent (the model of the silane coupling agent can be KH550, KH560, KH570, KH792, DL602, DL171, KH550 is used in this embodiment) and alumina powder, wherein the resin is epoxy Value is 0.01eq / 100g epoxy-modified silicone resin (produced by Dongguan Jinmen Petrochemical Co., Ltd., model is HG-41) described resin and the weight ratio of described quartz sand particle is 0.5:100,

[0028]The weight ratio of the polythiol curing agent to the resin is 15:100, the weight ratio of the alumina powder to the resin is 1:100; the weight ratio of...

Embodiment 2

[0038] The high-strength and high-permeability sand control casing provided in this embodiment includes a pipe body, which is suitable for being inserted around the well wall. The resin on the surface of the quartz sand particles, the polythiol curing agent used to solidify the resin (produced by Corning Chemical China Co., Ltd., the model is Capcure3-800, at present, this company has been acquired by BASF), adding Silane coupling agent in the resin (the model of silane coupling agent can be KH550, KH560, KH570, KH792, DL602, DL171, adopt KH560 in the present embodiment) and alumina powder, the grain of described alumina powder diameter is 25 μm, wherein, the resin is an epoxy-modified silicone resin with an epoxy value of 0.03eq / 100g (produced by Dongguan Jinmen Petrochemical Co., Ltd., the model is HG-41), and the resin and the quartz

[0039] The weight ratio of sand particles is 10:100, the weight ratio of the polythiol curing agent to the resin is 20:100, the weight ratio...

Embodiment 3

[0049] The high-strength and high-permeability sand control casing provided in this embodiment includes a pipe body, which is suitable for being inserted around the well wall. The pipe body includes the following components: acid-washed quartz sand particles with a particle size of Cover the resin on the surface of the quartz sand particles, the polythiol curing agent for curing the resin (produced by Corning Chemical China Co., Ltd., the model is Capcure3-800, at present, this company has been acquired by BASF), Add polymethylhydrogensiloxane, polysiloxane, silane coupling agent in described resin (the model of silane coupling agent can be KH550, KH560, KH570, KH792, DL602, DL171, adopt in the present embodiment KH570) and alumina powder, wherein the resin is an epoxy-modified silicone resin with an epoxy value of 0.02eq / 100g (produced by Dongguan Jinmen Petrochemical Co., Ltd., the model is HG-41), and the resin and The weight ratio of the quartz sand particles is 8:100, the...

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PUM

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Abstract

The invention provides a high-strength sand prevention casing pipe with high perpetration rate. The casing pipe comprises a pipe body suitable for being inserted into the periphery of well wall. The pipe body comprises aggregate particles, a resin film used for coating the surface of the aggregate particles and polythiol curing agent used for solidifying the resin film, wherein the resin film refers to epoxy modified organic silicon resin with an epoxy value of 0.23-0.56 eq / 100g. A weight percentage of the resin film and the aggregate particles is 0.5-10: 100 and the weight percentage of the polythiol curing agent and the resin film is 15-20: 100. The casing pipe has the advantages of being high in strength, permeating oil effectively, preventing water effectively and being capable of being suitable for the sand prevention casing pipe of the periphery of the well wall.

Description

technical field [0001] The invention relates to a sand control casing for oil recovery, which belongs to the technical field of oil recovery. Background technique [0002] The crude oil in the oil field has high viscosity, low porosity of rock formations, and poor connectivity of voids, which bring great difficulties to oil production. In order to enhance oil recovery and oil recovery rate, the traditional method is to use fracturing proppant to increase the porosity and connectivity of rock formations. Commonly used fracturing proppants are mainly quartz sand and ceramsite sand. Quartz sand is cheap, but its strength is not high, and its resistance to crushing is poor. When crushed, a large number of fragments and fine silt are produced. These fine silt migrate in the cracks and block the cracks, thereby reducing the conductivity of the cracks; ceramsite sand It has high anti-breaking ability, but its price is more expensive, and its density is relatively high. During con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/14E21B17/00C04B14/06
Inventor 秦升益王光胡宝苓许智超钟毓娟
Owner BEIJING RECHSAND SCI & TECH GRP