The Application And Extension Of The Technology Using The Electric Potential Method To Monitor The Residual Oil Distribution In Liaohe Oilfield

Liaohe Oilfield is now on its secondary recovery stage. The flooding development is an important method to enhance oil recovery and has been widely used in the operation. With the main oilfield oil recovery development, it enters into a double high phase as high water-bearing and high revovery. There exists a complex water and oil relationship and more distributed oil residual. Throught the study of the electric potential method to monitor the residual oil and water distribution, we can measure the water drive frontier and provide a scentific information to reasonably, ecomomically plan the oilfield development.Now we have four methods to monitor the water drive frontier named as 4D seismology, logging reservoir characterization, dynamic conductor charging method and tracer logging monitoring which all have different disadvantages.The electric potential method which developed in recent years,can monitor water drive frontier and then measure the residual oil distribution. Now it has been widely used in Jianghan Oildield and Zhongyuan Oilfield and acqired good results. Due the fact that it has been used in Liaohe Oilfield, our company start the scentific research in 2005 with 200,000.00RMB used in data acquisition,processing and interpretation.In Nov. 2006, we made two tests on Jin 16 block (area 0.8 square kilometers) and Jin 2-6-9 block (area 0.6 square kilometers) in Jinzhou oil production plant.We have made a comprehensive interpretation of the seismic data (30 square kilometers) collected from Jin 2-6-9 block divided by four layers: Dalingheâ… ,â…¡,â…¢and Xinglongtai layer from which we got four construction mapps, one sedimentary face map, one equivalent depth sand map.we picked up five cross well line profiles and made the three-instantaneous processing seperately and try to testify the rationality of the electric potential method data results through comparation which we conclude the facts as follows.The electric potential method data results just show the dynamic data of the production well and the seismic attribution character. The residual oil and water relationship coming from the electric potential method monitoring can be dependable.