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Imbibition oil displacement agent and preparation method thereof

An oil displacement agent and imbibition technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as poor temperature and salt resistance, large adsorption loss in formations, and complicated preparation processes

Active Publication Date: 2021-09-10
NINGBO FENGCHENG NANOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing imbibition oil displacement agents have the following problems: (1) The preparation process is complicated, difficult to operate, and the reaction conditions are relatively harsh; (2) The temperature resistance and salt resistance are poor, and the adsorption loss to the formation is large; (3) Some properties are not good, lead to poor suction efficiency

Method used

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  • Imbibition oil displacement agent and preparation method thereof
  • Imbibition oil displacement agent and preparation method thereof
  • Imbibition oil displacement agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] Embodiment 1 Preparation of imbibition oil displacement agent for low permeability reservoir

[0104] Composition of raw materials: 30wt% nano-active agent material, 20wt% fatty alcohol polyoxyethylene ether (specifically AEO-9), 20wt% coconut oil fatty acid diethanolamide, and the rest is water.

[0105] Preparation method: add fatty alcohol polyoxyethylene ether and coconut oil fatty acid diethanolamide into water, stir until uniform at a stirring speed of 400r / min, then add nano active agent material, and stir uniformly at the same speed to obtain the osmotic Oil-absorbing agent.

Embodiment 2

[0106] Embodiment 2 Preparation of imbibition oil displacement agent for low permeability reservoir

[0107] Composition of raw materials: 60wt% nano-active agent material, 10wt% fatty alcohol polyoxyethylene ether (specifically AEO-9), 10wt% coconut oil fatty acid diethanolamide, and the rest is water.

[0108] Preparation method: add fatty alcohol polyoxyethylene ether and coconut oil fatty acid diethanolamide into water, stir until uniform at a stirring speed of 400r / min, then add nano active agent material, and stir uniformly at the same speed to obtain the osmotic Oil-absorbing agent.

Embodiment 3

[0109] Embodiment 3 Preparation of imbibition oil displacement agent for low permeability reservoir

[0110] Composition of raw materials: 30wt% of nano active agent material, 20wt% of alkylphenol polyoxyethylene ether (specifically OP-10), 10wt% of coconut oil fatty acid diethanolamide, and the rest is water.

[0111] Preparation method: add alkylphenol polyoxyethylene ether and coconut oil fatty acid diethanolamide to water, stir until uniform at a stirring speed of 400r / min, then add nano-active agent material, and stir uniformly at the same speed to obtain the Osmosis oil displacement agent.

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Abstract

The invention discloses an imbibition oil displacement agent and a preparation method thereof. The imbibition oil displacement agent comprises the following components: 20-60 parts by weight of a nano active agent material; and 10-40 parts by weight of a nonionic surfactant. The nano active agent material is obtained by polymerizing raw materials containing a double-bond modified lamellar nano material, a hydrophilic monomer and a hydrophobic monomer; the hydrophilic monomer is at least one of anhydride compounds; and the hydrophobic monomer is at least one of long-chain alkyl allyl quaternary ammonium salts. The nano active agent material is added into the imbibition oil displacement agent and combined with the non-ionic surface active agent to achieve a synergistic effect, the efficient imbibition oil displacement agent (system) which is easy to prepare and suitable for a low-permeability oil reservoir is obtained, and the efficient imbibition oil displacement agent has important significance and economic value for improving the development efficiency of the low-permeability oil reservoir.

Description

technical field [0001] The application relates to a imbibition oil displacement agent and a preparation method thereof, belonging to the technical field of oil and gas field development. Background technique [0002] With the deepening of oil and gas field development, many oil fields have entered the middle and late stages of development, and low-permeability reservoirs have become an important area for increasing production in old oil fields and the main target for further exploitation in the future. However, low-permeability oil and gas reservoirs have the characteristics of poor reservoir physical properties, low formation energy, low permeability, slow conventional production, and difficult reservoir stimulation, which directly restrict the economic development of low-permeability oil and gas reservoirs. This part of the reservoir is often accompanied by naturally developed fractures or a rock matrix-fracture system is formed after reservoir reconstruction. The fracture...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 赵聪吴文炜刘宇虹孙静波王耀国
Owner NINGBO FENGCHENG NANOTECHNOLOGY CO LTD
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