密度选择性堵水工艺在缝洞型油藏中的应用

Application of selective water plugging with density in fracture-hole reservoir

塔河油田缝洞型油藏油井易过早见水甚至暴性水淹,导致油井产量急剧下降,堵水成为重要的稳油控水措施。对缝洞型储层特征认识程度有限导致前期堵水效率低,常规固化颗粒堵剂无选择性,易将产层堵死,对此提出以聚合物托举、超低密度堵剂建立隔板、高强度堵剂封口的密度选择性堵水工艺,并将缝洞型储层分为上缝下洞型、上洞下缝型、洞-缝-洞型3种类型,结合3种储层特点提出相应配套堵水工艺,取得了较好的堵水增油效果。

Oil wells are easy to produce water early and even serious water channeling in fracture-vug carhonate reservoir in Tahe Oilfieht. which causes the production output to decrease sharply. Water plugging becomes an important measure of stabilizing oil production and cnntrolling water cut. Aiming at the problem that the conventional curing particle agent has no selective and is easy to seal the pruducing pay, and that the understanding of fracture-vug reservoir characteristics is limited to result in a low water plugging eft^ciencv at early days, this paper puts forward the selective water plugging with density of polymer lifting, barrier estahlishment of uhra-low density plugging agent and high strength plugging agent. The fracture-rug reservoir is divided into upper fracture-lower hole type, upper hole-lower fracture type and hole-fracture-hole type. Relevant matching water plugging technologies are given, combined with the characteristics of the three reservoirs, and a good effect of water plugging and oil increment has been obtained.