A kind of polymer microsphere regulating and displacing agent and preparation method thereof
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A technology for controlling displacement agent and polymer, which is applied in the field of polymer microsphere controlling displacement agent and its preparation. Residual resistance coefficient, the effect of improving high temperature resistance and shear resistance, and improving oil recovery
Active Publication Date: 2021-12-31
东营市惠好科技开发有限责任公司
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For my country's oilfields, there are many development layers, and the inter-layer and intra-layer heterogeneity are serious. After entering the high water-cut and ultra-high water-cut period, the injection fluid has a small sweep coefficient and a low recovery factor.
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Embodiment 1
[0029] A polymer microsphere regulating and displacing agent, it is composed of acrylamide 21g, 4-vinylbenzenesulfonate 5g, N, N-methylenebisacrylamide 0.5g, sorbitan monooleate 5g, peroxide Ammonium sulfate 1.5g, potassium persulfate 0.1g, vegetable oil 150g and deionized water 100g.
[0030] The preparation method of above-mentioned polymer microsphere regulating and displacing agent comprises the following steps:
[0031] (1) Add oil and emulsifier into the reaction kettle, stir evenly to form a continuous oil phase;
[0032] (2) dissolving acrylamide, anionic surfactant, crosslinking agent, and 30% ammonium persulfate in deionized water, stirring evenly, adjusting the pH value to 6-8, and forming an aqueous phase;
[0033] (3) Potassium persulfate and remaining ammonium persulfate are dissolved in deionized water respectively to form potassium persulfate solution and ammonium persulfate solution;
[0034] (4) Add the water phase to the oil phase under the stirring condit...
Embodiment 2
[0036] The difference between Example 2 and Example 1 is that the composition of the polymer microsphere displacing agent is 25g of acrylamide, 8g of β-allyl sulfonate, 1.2g of N,N-methylenebisacrylamide, and sorbic acid Alcohol anhydride monooleate 8g, ammonium persulfate 2g, potassium persulfate 0.5g, vegetable oil 250g and deionized water 280g.
Embodiment 3
[0038] The difference between embodiment 3 and embodiment 1 is: step (2) dissolving acrylamide, anionic surfactant, crosslinking agent, 50% ammonium persulfate in deionized water, stirring evenly, adjusting the pH value to 6-8 , forming an aqueous phase.
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Abstract
The invention discloses a polymer microsphere adjusting and driving agent, which comprises the following raw materials in parts by weight: 21-25 parts of acrylamide, 5-8 parts of anionic surfactant, 0.5-1.2 parts of crosslinking agent, and 5-8 parts of emulsifier 1.5-2 parts of ammonium persulfate, 0.1-0.5 parts of potassium persulfate, 150-250 parts of oil and 100-280 parts of deionized water; stir the oil and emulsifier evenly to form a continuous oil phase; mix acrylamide, anion surface Active agent, crosslinking agent, and part of ammonium persulfate are dissolved in deionized water to form a water phase; potassium persulfate solution and ammonium persulfate solution are prepared; the water phase is added to the oil phase, ammonium persulfate solution is added at low temperature, and persulfate solution is added at high temperature Potassium solution, constant temperature reaction and natural cooling to room temperature. The invention provides a polymer microsphere control and displacement agent, through the combined reaction of the above-mentioned several materials, it is possible to synthesize polymer gel microspheres with good gel ductility matching its pore throat size, which greatly improves oil recovery .
Description
technical field [0001] The invention relates to the technical field of oil-displacing agents for oil fields, in particular to a polymer microsphere regulating and displacing agent and a preparation method thereof. Background technique [0002] As an extremely important energy source and chemical raw material, the worldwide demand for oil continues to grow, especially in my country. On the one hand, the growth rate of oil demand for national economic development is greater than ever before. On the other hand, my country's main oil fields All of them have entered the period of high water-cut or ultra-high water-cut mining, the difficulty of mining has increased, the rate of production decline has increased, and the reserve reserves are seriously insufficient, and the contradiction between supply and demand of oil has become increasingly prominent. There are two effective ways to alleviate the increasingly prominent contradiction between oil supply and demand: one is to find new...
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