Study On The Sedimentary Characteristics And The Factors Of Accumulation Of Beach-bar In Haiyue Structural Belt

Haiyue structural belt is located in the central region of Liaohe shallow water area,on both sides of Haiyue structural belt close to the oil generating depressions in Gaizhoutan and Hainan,it have one uplift in the middle of the two depressions,the conditions of the petroleum entrapment are very favorable.The project has carried out relevant research work on the key problems of the petroleum entrapment of in the transitional zone,main results achieved and understanding are as follows:Carry out the research in the formation of Beach bar.Reference the formation of Dongying depression' s research results,handling to the formation zone and form the beach bar,the northern section of ridges developmented into delta deposit,the formation zone was transformed by the strong lake waves and longshore current,contrastive analysis the transitional zone in Haiyue with Dongying period is gentle subaqueous palaeohumus.Because of the frequent change of water body,Short-term cyclotron formed.It cause the formation of the beach bar have a characteristic “Vertical stack and the horizontal continuous”.Carry out the research of description of Beach bar.Use wave impedance inversion technology to describe sand body morphology,for the geomorphic background to predict sand body develops in a favorable position,according to the seismic reflection to characteristics the implementation of the favorable sand body distribution range,according to the characteristics of the formation zone and form the beach bar sand body size,for the geomorphic background to predict sand body develops in a favorable position,according to the seismic reflection to characteristics the implementation of the favorable sand body distribution range.There are 18 transition zone depicts the sand bodys in the Haiyue,Overlap trap area are 22 km~2.Carry out the research of ccumulation characteristics bar.Form the oil to the reservoir which we know,we will clear the size of sand body development can decision degree of hydrocarbon enrichment and sand body property control capacity,oil and gas transmission system,lateral sealing of sand body.That are four main control factorses for the beach bar sand accumulation.Comprehensive evaluation of the degree of hydrocarbon enrichment and sand body property control capacity,oil and gas transmission system,lateral sealing of sand body,I depicts 18 sand bodies to? ? ?.I optimization?trap ?trap to put forward HN-29 well and HN-28 well' s deployment recommendations.