Functional desmosome profile control agent and preparation method and application thereof

A technology of plugging agent and desmosome, which is applied in the direction of chemical instruments and methods, earth drilling, mining fluids, etc. It can solve the problems of easy plugging of low-permeability layers, poor temperature resistance, salt resistance, and limited application, so as to achieve convenient construction , high tensile strength and low shrinkage

Active Publication Date: 2016-07-27
北京石大瑞伽石油技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polymer gel plugging agent has poor temperature resistance and salt resistance and is easy to degrade, and the inorganic crosslinking agents used such as potassium dichromate, aluminum citrate and various chromium salts have certain pollution to the environment, which greatly limits the Its application; most granular plugging agents only act on the near-wellbore area and have no selectivity. They are easy to block low-permeability layers and cause pollution to the reservoir. It is also not advisable from the perspective of reservoir protection

Method used

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  • Functional desmosome profile control agent and preparation method and application thereof
  • Functional desmosome profile control agent and preparation method and application thereof
  • Functional desmosome profile control agent and preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0039] This embodiment provides a method for preparing functional desmosome plugging agent particles, wherein the method includes the following steps:

[0040] a, sub-sieve to obtain 40 mesh quartz sand;

[0041] B. After the acrylic resin is melted, it is treated in a fluidized bed, and the surface of the core material (quartz sand) is covered with acrylic resin, and after the thickness reaches 15 μm, it is dried and sieved;

[0042] c. After melting the linear low-density polyethylene, it is treated in a fluidized bed, and the surface of the particles obtained in step b is coated with linear low-density polyethylene. After the thickness reaches 10 μm, after drying and sieving, the functional desmosomes are obtained. agent granules.

Embodiment 2

[0044] This embodiment provides a method for preparing a functional desmosome plugging agent, wherein the method specifically includes the following steps:

[0045]Add 2 g of guar gum into 200 mL of water, stir for 60 min, then add 10 g of functional desmosome plugging agent particles prepared in Example 1, and stir for 100 min to obtain the functional desmosome plugging regulating agent.

Embodiment 3

[0047] This embodiment provides a method for preparing functional desmosome plugging agent particles, wherein the method includes the following steps:

[0048] a, sub-sieve to obtain 100 mesh ceramsite;

[0049] b. Melt the superabsorbent resin and process it in a fluidized bed, coat the superabsorbent resin on the surface of the core material (ceramsite), and after the thickness reaches 6 μm, dry and sieve;

[0050] c. Melting the phenolic resin and treating it in a fluidized bed, coating the surface of the granules obtained in step b with phenolic resin to a thickness of 5 μm, drying and sieving to obtain functional desmogranule plugging agent particles.

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Abstract

The invention provides a functional desmosome profile control agent and a preparation method and application thereof.The functional desmosome profile control agent is prepared from, by weight, 0.5%-11% of functional desmosome profile control agent particles, 0.1%-1% of guanidine gum and the balance water, wherein the total weight of the functional desmosome profile control agent is 100%, the functional desmosome profile control agent particles comprise inner cores, thermal swelling crosslinking resin films and semi-permeable protective films, the surfaces of the inner cores are wrapped by the thermal swelling crosslinking resin films, and the surfaces of the thermal swelling crosslinking resin films are wrapped by the semi-permeable protective films.The invention further provides the preparation method of the functional desmosome profile control agent and application of the functional desmosome profile control agent in oil well deep profile control.The functional desmosome profile control agent has the characteristics of temperature resisting, salt resisting, swelling delaying, crosslinking under heating and the like and is a novel profile control agent which is convenient to construct and easy to operate.

Description

technical field [0001] The invention relates to a functional desmosome blockage regulating agent and its preparation method and application, belonging to the technical field of oil recovery in the process of oil reservoir development. Background technique [0002] Water production from oil wells is a common problem in oilfield development. my country's oilfields are dominated by continental deposits, and the reservoir heterogeneity is serious. With the increase of the development period, due to long-term water erosion, clay swelling, particle migration, sand production, fluid mobility differences, operation failures, and production measures errors For other reasons, the heterogeneity of the oil layer is further deteriorated, forming a dominant channel of water flow in the formation, resulting in water coning, water channeling, and water fingering, leading to premature water breakthrough or water flooding in some oil wells, and low efficiency or ineffective circulation of wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/508C09K8/514C09K8/516E21B43/22E21B33/13
CPCC09K8/5083C09K8/5086C09K8/514C09K8/516C09K2208/18E21B33/13E21B43/16
Inventor 李远超
Owner 北京石大瑞伽石油技术开发有限公司
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