The Fine Geological Research Of Zhao 25 Block At Zhaozhou Oilfield

The two main themes of the oilfield development are understanding and transforming the oil reservoir. How to understand the actual situation of the reservoir generally requires fine geological research. Only in the scale of the more detailed understanding and research on reservoir, the further potential object of remaining oil can be found out and the oilfield production is guided.Zhou 25 block of Zhaozhou oilfield put into production in 2007. The initial average daily oil production per well is 2.6 t. The six months decreasing amplitude is 42.6% and a year and a half decreasing amplitude is 53.8%. In 2012 the average daily oil production per well has dropped 0.5 t. The operating costs of well station is high. In order to solve the area yield recursive damped larger issues, on the block to carry out fine geological research. The study is based on the previous results, using the updated geological, logging, seismic and production performance data obtained in recent years, in the block more tectonic sedimentary facies and study fine. In the fine sedimentary facies research process, through the refinement of oil reservoir, the development of regional source analysis, single well logging facies, even well facies (profile) and surface analysis, the characteristics of the evolution of study area the sedimentary units of the distribution of sedimentary facies and sedimentary rule; in the fine structure in the course of the study, the interpretation accuracy the improvement of seismic data, take the coherence technique, fault edge and local change rate of detection and other means, to clarify the fault structure and distribution area, the underground structure.Through this study, we further make clear the remaining oil of each sedimentary unit in the plane and vertical distribution, summarizes the types and distribution of remaining oil, from the strengthening of Fuyu reservoir waterflooding adjustment, timely expansion of comprehensive adjustment suggestions, and pointed out the direction for the decreasing amplitude control block Zhao 25.