塔河油田缝洞型碳酸盐岩油藏化学堵水技术初探

Analysis and Discussion of Chemical Water Shutoff in Fracture-cavity Carbonate Karst Reservoirs in Tahe Oilfield

塔河油田碳酸盐岩缝洞型油藏储集体不同于砂岩油藏,传统的油藏工程理论已不适用,缝洞型油藏的地质建模和表征是当前的世界级难题。由于储层极强的非均质性和复杂的油水关系,导致矿场的总体堵水效果很差。虽然国内外对此进行了大量研究,但取得的成果很少。综述了在碳酸盐岩缝洞型油藏中开展的堵水作业现状,认为堵水要从整个区块出发,从储层的地质模型着手,加强堵剂的室内研究,以提高现场堵水效果。

As fracture - cavity carbonate karst reservoirs in Tahe Oilfield are completely different from the sandstone reservoirs, the traditional theory for reservoir engineering is no longer applicable. The geological modeling and characterizing of the reservoirs are the most difficult problem to be solved. Because of the severe heterogeneity and the complex relationship between oil and water in the reservoir, the overall effect of water shutoff is poor. Although a lot of research has been carried out at home and abroad, the results obtained was very little. This article reviews the current situation of the water shutoff in fracture - cavity carbonate karat res- ervoirs and proposes that the research of water shutoff should be carried out from the whole reservoir and the geological modeling, and strengthen the laboratory research of water plugging agents to enhance water shutoff effects.