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A kind of high-strength and high-permeability chemical sand control agent and its preparation method and application

A high-permeability chemical and sand control agent technology, used in chemical instruments and methods, earthwork drilling, wellbore/well components, etc., can solve the problems of high curing temperature, low consolidation strength of coated sand, and long curing time. Achieve the effect of high curing temperature, wide curing temperature range and long curing time

Inactive Publication Date: 2018-08-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a chemical sand control agent suitable for sand production wells in unconsolidated sandstone reservoirs and its preparation method and application, so as to overcome the problems of low consolidation strength, long curing time and high curing temperature of the coated sand used in the original chemical sand control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Take 95g of quartz sand, 3.0g of epoxy-modified phenolic resin, 0.015g of nano-silicon dioxide, 0.18g of phenalkamine curing agent, and 0.12g of silane coupling agent, and add them to the sand mixer, fully stir and mix, and heat to 55 ℃, curing for 30 hours, sealed and stored, that is, a high-strength and high-permeability chemical sand control agent.

Embodiment 2

[0031] Take 100g of quartz sand, 3.5g of epoxy modified phenolic resin, 0.028g of nano-silicon dioxide, 0.28g of phenalkamine curing agent, and 0.21g of silane coupling agent, and add them to the sand mixer, fully stir and mix, and heat to 65 ℃, curing for 34 hours, sealed and stored, that is, a high-strength and high-permeability chemical sand control agent.

Embodiment 3

[0033] Take 98g of quartz sand, 3.2g of epoxy modified phenolic resin, 0.026g of nano-silicon dioxide, 0.23g of phenalkamine curing agent, and 0.16g of silane coupling agent, and add them to the sand mixer, fully stir and mix, and heat to 60 ℃, curing for 32 hours, sealed and stored, that is, a high-strength and high-permeability chemical sand control agent.

[0034] The field test situation evaluation of above-mentioned embodiment gained high-strength high-permeability chemical sand control agent is as follows:

[0035] Since the high-strength and high-permeability chemical sand control agent sand control technology was implemented in October 2011, it has been applied to 15 well times. After the measures, the average daily fluid increase of a single well is 21.1 tons, and the average daily oil increase of a single well is 2.8 tons. The longest production cycle is 294 days. It is still valid at present, and a total of 3,930 tons of oil has been added. Affected by casing defor...

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Abstract

The invention provides a high-strength high-permeability chemical sand prevention agent, and a preparation method and an application thereof. The high-strength high-permeability chemical sand prevention agent is composed of a proppant, a cementing agent, an accelerator, a curing agent and a coupling agent according to a certain ratio. The preparation method comprises the following steps: above raw materials are mixed at a specific temperature, and are stirred, and the obtained mixture is cured for a certain period of time to obtain the high curing strength sand prevention agent. The sand prevention agent has good tolerance to acid, water, salt and oil, has high stability in high temperature and high humidity environment, and is mainly used in chemical sand prevention well extract production, serious casing deformation well sand prevention, and sand prevention of wells without mechanical sand prevention and oil water wells with low reservoir temperature in order to increase liquid production of the oil well, prolong the period of validity of well sand prevention, increase the amount of oil and reduce the production cost.

Description

technical field [0001] The invention relates to the technical field of sand control in the process of petroleum development, in particular to a high-strength and high-permeability chemical sand control agent and its preparation method and application. Background technique [0002] Unconsolidated sandstone reservoirs in my country are widely distributed and have abundant reserves. Due to the loose formation cementation of unconsolidated sandstone reservoirs, sand production is serious during the production process, and sand control is the dominant process to maintain the normal production of such reservoirs. At present, composite sand control is mainly used, among which chemical sand control mainly adopts coated sand control, and the field application has achieved certain results. But there are the following problems: (1) The curing strength is low and the permeability is poor. The strength and permeability of the artificial borehole wall are the key indicators to determine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/56E21B43/02
CPCC09K8/56E21B43/02
Inventor 肖建洪高成元王代流张学超李伟张岩王志刚沈朝霞张庆春
Owner CHINA PETROLEUM & CHEM CORP
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