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High-strength sand prevention casing pipe with high perpetration rate

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

Active Publication Date: 2013-06-19
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

[0028] The high-strength and high-permeability sand control casing provided by this embodiment includes a pipe body suitable for inserting around the well wall. The pipe body includes the following components: ordinary quartz sand particles with a particle size of 0.425mm-0.85mm, and a coating The resin on the surface of the quartz sand particles, the polythiol curing agent used to cure the resin (produced by Corning Chemical China Co., Ltd., the model is Capcure3-800, currently, the company has been acquired by BASF), In the resin, the 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, where the resin is epoxy The epoxy-modified silicone resin (produced by Dongguan Jinmen Petrochemical Co., Ltd., model HG-41) with a value of 0.01eq / 100g is 0.5:100 by weight of the resin and the quartz sand particles. The weight percentage of mercaptan curing agent to the resin is 1...

Embodiment 2

[0038] The high-strength and high-permeability sand control casing provided by this embodiment includes a pipe body suitable for inserting around the well wall. The pipe body includes the following components: washed quartz sand particles with a particle size of 0.85mm-1.18mm, and a coating The resin on the surface of the quartz sand particles, the polythiol curing agent used to cure the resin (produced by Corning Chemical China Co., Ltd., the model is Capcure3-800, currently, the company has been acquired by BASF), The silane coupling agent in the resin (the model of the silane coupling agent can be KH550, KH560, KH570, KH792, DL602, DL171, KH560 is used in this embodiment) and alumina powder, the particles of the alumina powder The diameter is 25μm, wherein the resin is an epoxy-modified silicone resin (produced by Dongguan Jinmen Petrochemical Co., Ltd., model HG-41) with an epoxy value of 0.03eq / 100g, and the resin is combined with the quartz The weight percentage of sand p...

Embodiment 3

[0048] The high-strength and high-permeability sand control casing provided by this embodiment includes a pipe body suitable for inserting around the well wall. The pipe body includes the following components: pickling quartz sand particles with a particle size of 0.85mm-1.18mm, The resin covering the surface of the quartz sand particles, the polythiol curing agent used to cure the resin (produced by Corning Chemical China Co., Ltd., and the model is Capcure3-800. Currently, the company has been acquired by BASF), The polymethylhydrogensiloxane, polysiloxane, and silane coupling agent added to the resin (the model of the silane coupling agent can be KH550, KH560, KH570, KH792, DL602, DL171, which are used in this embodiment KH570) and alumina powder, wherein the resin is an epoxy modified silicone resin (produced by Dongguan Jinmen Petrochemical Co., Ltd., model HG-41) with an epoxy value of 0.02eq / 100g, and the resin is compatible with The weight percentage of the quartz sand ...

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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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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
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