Research On The Target Prediction Of The Rolling Exploration And Development Of Donghe Sandstone In The Northwest Block Of Hudson Oilfield

The Donghe sand reservoir in Hudson oilfield is a typical marine sandstone reservoir in China,which has a high degree of exploration and development,and has entered the middle and late stage of development.The accumulation model of the study area isn't clearly understood because of complex geological conditions.This paper systematically studies the formation process of sandstone reservoir,the pattern and distribution characteristics of Donghe sandstone in order to deepen the understanding of the mechanism of the reservoir formation and guide the exploration and development of the oil field.Through systemically collating the static data,such as drilling,core analysis,well logging interpretation results and seismic data,and analyzing the dynamic data,such as oil and water interface depth,static pressure and production data,the study area is divided into 4 large areas and 12 development blocks.By studying the static characteristics of source rocks,reservoirs,cap rock,traps and conducting systems,and combining with the study of oil and gas accumulation stages,the accumulation model is summarized.It is believed that slope state of oil and water interface in today's oil reservoir is due to the migration rate of oil and gas,influenced by the physical property of the transport layer and the interlayer in the secondary migration,is less than the migration rate of the high point.The pattern of sedimentary faces and the distribution characteristics of sand body in the study area are analyzed.It is believed that the sand bodies are mainly lentoid and overlapped each other on the section,and the main parallel paleo coastline on the plane.Combined with seismic inversion analysis,the distribution characteristics of favorable sand bodies in the study area are predicted,and two favorable targets with relatively small exploration risk are predicted.