Blocking Drive Technology In The Late High Water Cut RenQiu Oilfield Application

Carbonate reservoirs in Ren qiu of Hua bei Oilfield has been developed in the late stages with high water cut. The thickness of the remaining oil is very small after years of development. However, the traditional technology based on chemical water shut-based blocking, acid, smoke and other integrated control measures, can only play a role in the fracture system, while the productive potential of the deep strata of the rocks is limited. In response to these problems, survey the current domestic hot oil displacement agent, blocking agent of the recent research progress and application, and chemical water shut off and oil combination of drive technology of composite block, on the fracture system, rock system, chemical flooding, and other aspects of the mechanism of water shutoff; were blocking agent and the displacing agent formulation and performance evaluation of laboratory test laboratory test; flooding under the blocking mechanism and well selection conditions, well have some measures optimal, field application of technical tests, all well construction technology general squeeze by the slug-type injection; through physical simulation, use of blocking technology combined flooding method of plugging of high permeability water can be effectively sealing the cracks or layers, increase the swept volume of bottom water, slow down the rise in bottom water velocity; By injecting water displacement agent can significantly reduce the interfacial tension, rock system to speed up the oil from the suction rate, to achieve the objective of improving reservoir development, Renqiu carbonate reservoirs that meet the high temperature composite construction blocking formula and flooding agent technology has a practical significance.