Naphthenic petroleum sulfonate compound oil-displacing agent for fracturing fluid and preparation method thereof

A naphthenic petroleum and sulfonate technology, applied in chemical instruments and methods, drilling compositions and other directions, can solve the problems of low crude oil recovery rate and single method of tight oil and gas exploitation, and achieve improved crude oil recovery. efficiency, raw material cost is simple and easy to obtain, and the raw material cost is low.

Inactive Publication Date: 2020-07-28
克拉玛依金昇油田助剂有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a naphthenic petroleum sulfonate compound oil displacement agent for fracturing fluid and a preparation method thereof, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of single exploitation mode of existing tight oil and gas, which leads to The problem of poor oil recovery

Method used

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  • Naphthenic petroleum sulfonate compound oil-displacing agent for fracturing fluid and preparation method thereof

Examples

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Effect test

Embodiment 1

[0016] Embodiment 1: The fracturing fluid uses a naphthenic petroleum sulfonate compound oil displacement agent, and the raw materials include 0.005% to 0.05% of naphthenic petroleum sulfonate and disodium edetate by mass percentage 0.5% to 3%, and the balance is fracturing fluid, which is prepared according to the following method: the first step is to mix the required amount of naphthenic petroleum sulfonate with water and then add a regulator to obtain a pH value of 8 to 3%. 11 naphthenic petroleum sulfonate solution, wherein the mass percentage of naphthenic petroleum sulfonate solution is 10%; second step, the required amount of naphthenic petroleum sulfonate solution, ethylenediaminetetraacetic acid The disodium is added to the remainder of the fracturing fluid at a temperature of 50°C to 80°C and mixed evenly to obtain a naphthenic petroleum sulfonate compound oil displacement agent for fracturing fluid.

[0017] In the prior art, the development method of tight oil res...

Embodiment 2

[0018] Embodiment 2: The fracturing fluid uses a naphthenic petroleum sulfonate compound oil displacement agent, and the raw materials include 0.005% or 0.05% of naphthenic petroleum sulfonate, disodium ethylenediaminetetraacetic acid by mass percentage 0.5% or 3%, and the balance is fracturing fluid, which is prepared according to the following method: the first step is to mix the required amount of naphthenic petroleum sulfonate with water and then add a regulator to obtain a pH value of 8 or 11 naphthenic petroleum sulfonate solution, wherein the mass percentage of naphthenic petroleum sulfonate solution is 10%; second step, the required amount of naphthenic petroleum sulfonate solution, ethylenediaminetetraacetic acid Disodium is added to the remainder of the fracturing fluid at a temperature of 50°C or 80°C and mixed evenly to obtain a naphthenic petroleum sulfonate compound oil displacement agent for fracturing fluid.

Embodiment 3

[0019] Embodiment 3: As an optimization of the above embodiment, the fracturing fluid is guar gum fracturing fluid, linear polymer fracturing fluid, and slick water fracturing fluid.

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Abstract

The invention relates to the technical field of oil and gas exploitation, in particular to a naphthenic petroleum sulfonate compound oil-displacing agent for a fracturing fluid and a preparation method thereof. The naphthenic petroleum sulfonate compound oil-displacing agent for the fracturing fluid is prepared from the following raw materials of: naphthenic petroleum sulfonate, ethylenediamine tetraacetic acid disodium salt and the balance of the fracturing fluid. The preparation method comprises the following steps of: mixing naphthenic petroleum sulfonate with water, adding a naphthenic petroleum sulfonate solution and ethylenediamine tetraacetic acid disodium salt into the fracturing fluid, and uniformly mixing to obtain the naphthenic petroleum sulfonate compound oil-displacing agentfor the fracturing fluid. The naphthenic petroleum sulfonate is used as a surfactant to be compounded with the fracturing fluid; the obtained naphthenic petroleum sulfonate compound oil-displacing agent for the fracturing fluid can have ultralow interfacial tension in a relatively wide calcium ion mass concentration range; the problem of low crude oil recovery ratio caused by single exploitation mode in the prior art is solved; the crude oil recovery ratio can be increased to the maximum; raw materials are low-cost and easily available; and safety and high efficiency are achieved.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploitation, and relates to a naphthenic petroleum sulfonate compound oil displacement agent for fracturing fluid and a preparation method thereof. Background technique [0002] Intensify the research on tight oil and gas extraction technology, break through the technical bottleneck of efficient development of tight oil and gas, and accelerate the development of tight oil and gas to ensure the stability and growth of oil and gas production, maintain the balance of supply and demand in the domestic oil market, and prolong the strategic succession time of oil resources. National energy security, to meet the major needs of national economic development. The development method of tight oil reservoirs is mainly based on horizontal well volume fracturing, and the development method is single. Chemical agent flooding is used to change the physical and chemical properties of the displacement fluid a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 杨栩郭勇程尚民师理民邵黎明王帅樊景峰王志
Owner 克拉玛依金昇油田助剂有限公司
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