Chromium-free composite resin gel-type profile control agent for oil exploitation and preparation method and application thereof

A technology of composite resin and profile control agent, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of continuous improvement of profile control effect, increased post-processing burden, environmental pollution, etc., and achieve excellent oil recovery effect , good application prospects and the effect of industrialized production potential

Active Publication Date: 2016-03-02
DONGYING FANGLI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0020] As mentioned above, although a variety of profile control agents that can be used in the field of petroleum exploration and development are disclosed in the prior art, chromium compounds are usually used in...

Method used

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  • Chromium-free composite resin gel-type profile control agent for oil exploitation and preparation method and application thereof
  • Chromium-free composite resin gel-type profile control agent for oil exploitation and preparation method and application thereof
  • Chromium-free composite resin gel-type profile control agent for oil exploitation and preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example 1

[0096] Preparation Example 1: Preparation of Nano-Silica Modified Crosslinked Polymer

[0097] A1: the preparation of pre-polymerized cross-linking agent solution, which comprises the following steps:

[0098] A1-1: Add phenol and formaldehyde solution with a concentration of 37% by mass into the reactor (the molar ratio of phenol to formaldehyde in the formaldehyde solution is 0.75:1), stir and mix thoroughly, and then heat up to 70°C to obtain the reaction solution;

[0099] A1-2: Add kaolin-supported basic catalyst CAT to the reaction solution (the mass volume ratio of the kaolin-supported basic catalyst CAT to the reaction solution is 1:60g / ml), and continue to stir and react at 70°C for 35 minutes, Then naturally cool to room temperature and filter to separate the catalyst, and the filtrate is the prepolymerized crosslinking agent solution;

[0100] A2: Add anionic polyacrylamide with a degree of hydrolysis of 15-17% and a molecular weight of 15 million into deionized w...

preparation example 1-1—1-4

[0103] Preparation example 1-1—1-4: Preparation of nano-silica modified cross-linked polymer

preparation example 1-1

[0104] Preparation Example 1-1: Except that the catalyst in step A1-2 is replaced by DCAT by CAT, other operations are all the same, thus Repeat Preparation Example 1 to obtain Preparation Example 1-1, the obtained nano-silica The modified cross-linked polymer was named DJHW1.

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Abstract

The invention relates to a chromium-free composite resin gel-type profile control agent for oil exploitation. The profile control agent is prepared from a nano-silica modified cross-linked polymer, a stabilizing agent, a reinforcing agent, organic sulfonate, a density modifier, a surface active agent, an additive, a thickening agent, a wetting agent and water. According to the profile control agent, under the synergistic effect of unique modification of raw materials, suitable selection of components, unique steps and technological parameters of a preparation method and the like, the target product with the best effect is obtained; the target product has good mechanical performance, temperature resistance, mineralization resistance, alkali resistance and the like and has good application prospects and industrial potential in the energy exploitation field.

Description

technical field [0001] The present invention relates to a profile control agent used to improve petroleum products in oilfield exploitation and development, and its preparation method and application, more particularly to a chrome-free composite resin gel profile control agent for oil recovery, its preparation method and application , belonging to the technical field of oil and gas development. Background technique [0002] With the long-term exploitation of oil in our country, the production decline and the oil-water ratio are generally reduced in various large oil fields at present, which puts forward an urgent requirement on how to improve the oil recovery rate. Especially in the middle and late stages of oilfield water flooding development, due to the heterogeneity of the formation, the injected water often rushes along the high permeability layer, and the low sweep degree of the middle and low permeability layers seriously affects the development effect of water floodin...

Claims

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Application Information

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IPC IPC(8): C09K8/512C09K8/516
CPCC09K8/5086C09K8/512C09K8/516
Inventor 王培誉李建军周自阳张京栋王立文
Owner DONGYING FANGLI CHEM CO LTD
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