A functional desmosome plugging agent and its preparation method and application

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: 2018-02-09
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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  • A functional desmosome plugging agent and its preparation method and application
  • A functional desmosome plugging agent and its preparation method and application
  • A functional desmosome plugging agent and its preparation method and application

Examples

Experimental program
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Embodiment 1

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

[0040] a. Sieving to obtain 40 mesh quartz sand;

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

[0042] c. The linear low-density polyethylene is melted and treated in a fluidized bed, the surface of the particles obtained in step b is coated with linear low-density polyethylene, and after the thickness reaches 10 μm, after drying and sieving, the functional bridge particles are obtained. 剂粒。 Agent particles.

Embodiment 2

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

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

Embodiment 3

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

[0048] a. Sieving to obtain 100 mesh ceramsite;

[0049] b. After the super absorbent resin is melted and treated in a fluidized bed, the surface of the core material (ceramsite) is coated with super absorbent resin, and after the thickness reaches 6 μm, it is dried and sieved;

[0050] c. After the phenolic resin is melted and treated in a fluidized bed, the surface of the particles obtained in step b is coated with the phenolic resin to a thickness of 5 μm, dried and sieved to obtain functional bridge particle plugging control 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 bridge particle plugging control agent, a preparation method and application thereof, and belongs to the technical field of oil extraction in the process of oil reservoir development. Background technique [0002] Water production from oil wells is a common problem in the development of oil fields. my country’s oil fields are dominated by continental deposits, with serious reservoir heterogeneity. With the increase in development years, due to long-term water erosion, clay expansion, particle migration, sand production, fluid mobility differences, operation failures, and incorrect production measures The heterogeneity of the oil layer is further deteriorated and the formation of water flow dominant channels in the formation, leading to water cones, water channeling, and water fingering, causing some oil wells to see water or flooding prematurely, and water flooding is inefficient or ineffective. At present, the average ...

Claims

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Application Information

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Patent Type & Authority Patents(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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