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METHOD OF INSULATING WASHED HIGH-PERMEABILITY ZONES OF PRODUCTIVE FORMATION

机译:绝缘生产地层的高渗透性地带的方法

摘要

FIELD: oil and gas production. SUBSTANCE: to create water-shutoff barrier in washed high-permeability zones of productive formation by injecting aqueous solutions of two or more gel or precipitate-forming agents into formation, these solutions are injected in the form of 1:1 v/v mixtures of 50% aggregation-stable reverse emulsion in low-viscosity hydrocarbon solvent (gasoline, kerosene, etc.) in which 5-20% concentrate of porphyrin and asphalt-tar oil components is preliminarily dissolved. Dispersity of reverse emulsion (size of stabilized drops in "oil") should be of the same order of magnitude as the dimensions of washed high-permeability zones of formation. To initiate chemical interaction of injected gel and precipitate-forming agents, after injecting 50% reverse emulsion into washed high-permeability zones of formation and concentration of emulsion in these zones, hydrocarbon solution of reverse emulsion demulsifier is injected into formation. This leads to breakage of concentrated reverse emulsion, separation and mixing of gel and precipitate-forming agents, and therefore their chemical interaction in high-permeability formation zone to form water-shutoff barrier (cross- linked polymer composition or water-insoluble precipitate). EFFECT: enhanced efficiency of formation treatment due to prevented chemical reaction between applied agents and their adsorption under formation conditions. 4 cl, 2 tbl
机译:领域:石油和天然气生产。物质:通过将两种或多种凝胶或沉淀形成剂的水溶液注入地层中,在洗涤后的高渗透性生产层高渗区域中建立阻水屏障,这些溶液以1:1 v / v混合物的形式注入在低粘度烃溶剂(汽油,煤油等)中的50%聚集稳定的反向乳液,其中初步溶解了5-20%的卟啉和沥青-沥青油组分。反向乳液的分散度(“油”中稳定滴的大小)应与洗涤后的高渗透性地层的尺寸相同数量级。为了引发注入的凝胶和沉淀形成剂的化学相互作用,将50%的反向乳液注入已洗净的高渗透性地层中,并在这些区域中浓缩乳液后,将反向乳液破乳剂的烃溶液注入地层中。这导致浓缩的反向乳液破裂,凝胶和沉淀形成剂的分离和混合,并因此导致它们在高渗透性形成区的化学相互作用,形成水阻隔屏障(交联的聚合物组合物或水不溶性沉淀物)。效果:由于防止了施加剂之间的化学反应及其在形成条件下的吸附,因此提高了形成处理的效率。 4厘升,2汤匙

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