Fine Reservoir Evalution Of Liujianfang Oilfield In Beidagang Area

Liujianfang oilfield is located in the Midwest of the Beidagang area of Huanghua depression,Bohai Bay Basin.It is a typical multi-layer complex faulted block reservoir.In the exploration and development practice in recent years,the mining-employed reserves of the oil field is relatively low,and enters the high water exploitation stage.The distribution range of favorable reservoirs in Shahejie formation through fine three-dimensional reservoir evaluation.Understanding the distribution range of favorable reservoirs in each major oil-bearing strata,then a lot of “small but rich” high yield blocks are found.This paper use the thoughts of sequence stratigraphy and structural geology,deepen the research of hydrocarbon enrichment regularity,and carry out potential evaluation under subdivided series of strata.A more reliable seismic data body is formed and the data accuracy is improved by means of pre-stack depth migration of 3-D seismic data of Liujianfang oilfield.This paper constructs the stratigraphic framework by combining fine stratigraphic contrast,single well and geological seismic data.The structural features of the northern side of faulted noses,the middle slope area and the eastern faulted blocks are depicted,and a series of structural traps are described.By using multi-technique and multi-method,identify the distribution characteristics of the Shahejie formations.Carry out reservoir prediction under series of Shahejie formation.Evaluation and development are combined to evaluate the favorable targets of oil and gas reservoirs.Finally it provides several oil and gas reservoirs.Based on the three-dimensional evaluation method and comprehensive evaluation technology of complex fault block structural lithological reservoirs.The paper can provide some reference and reference value for other blocks.