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.
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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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