大庆萨中开发区油水界面的再认识

大庆萨中油田开发初期，由于取心、试油资料少，井网密度小，物性标准高，油水界面深度并不统一。随着油田开发技术和认识的不断提高，对萨中开发区油水界面有了新的认识，需要重新对油水界面进行统一。以取心、试油及生产测井资料为依据，对油水界面进行了重新确定。其油底深度在海拔-1188～-1190m，水顶深度在海拔-1213m左右。并给出了利用油水界面下移，对低效井进行治理的实例。

Re-recognition on the oil-water interface in Sazhong development area of the Daqing oilfiled

Because of the scarce of the coring and formation testing data,the small well spacing density,and the high standard of the property,the cognition to the depth of the oil- water interface has not come to unification in the initial period of the oilfield development. With the development of the constant improvement of the technology and understanding in the oilfield,we have realized a new understanding to the oil- water interface.This paper uses the information of the coring,the formation testing,and the production logging to confirm the oil- water interface again. According to the facts in the block,it uses some new methods such as additional perforating the same layer of oil- water, using the complex adjustment in the different layers of the well network.The block has made better result by using these to manage the low efficiency wells. It has important directive significance to how to excavate effectively the potentiality of the oil reservoir and carry out the control in the future. The oil- water interface in Sazhong development area is at an altitude of - 1060 meters. The oil bottom depth is at an altitude from - 1188 meters to - 1190 meters.The water top depth is about - 1213 meters.