Research Of The Matching Techniques Of Extract Technology In Chengdao Oilfield

Chengdao oilfield lies in the south of the Bohai Bay. The NgS reservoir of the oilfield is river-facies sand reservoir. The reservoir has more and thin layers in lengthways and has more diversifications in breadthwise. As the time of water injection is late, the stratum pressure dropped rapidly and the recovery rate is much lower, which is contrary with the platform's longevity. So, we should enhance recovery percent of reserves by increasing the water injection intensity.In order to accomplish the aim, we have done the"the research of the matching techniques of extract technology in the Chengdao Oilfield". The research investigated the extract technology and the accessional technique on the"sand control"&"rising"aspects in congeneric loose sanding reservoir. By the research we have analyzed the feasibility of extract technology on the NgS reservoir of Chengdao Oilfield. Using the research results of screw pump deep-lifting technology in slant well and electric pump lifting technology in the wells with high gas content of CB30, we studied the matching technique of extract. and we have carried on some researches for electric pump-well optimal design and the adaptation of oil production technology in the block of thickoilIntegrating some research results, we studied the accessional technique of extract technology. The research results is important for the aim of enhance recovery percent of reserves, and it is also a guidance to the evening developing and adjusting of Chengdao oilfield.