Research Of Turbidite Reservoir Prediction Technology In The Eastern Area Of Bonan Depression

Yi944 wellblock located in the eastern of Bonan depression, it belongs to the junction of Chengdong and Guxi fault zone in structure,and as the basin subsidence center and sedimentary center in the eastern of the Bonan oilfield. The main reservoir type is turbidite lithology reservoir in Es3.A total of 13 sand group development, 0-9 sand group is the main exploration laye,and the proven reserves are mainly concentrated in the 0-9 sand group.After years of study, we know the distribution of turbidite in vertical direction, as well as the turbidite sand body’s formation mechanism and the reservoir forming mechanism. But there are many factors affect the rolling exploration, such as the sand body is too small, the lithology change too fast in lateral direction, the seismic reflection characteristics is not obvious and so on. As the sand body have strong concealment, it is difficult to describe the sand body clearly in current technical means. It is hard for us exploration and development on the whole as we cannot determine whether the hydrocarbon accumulation layer is different, main controlling factors of hydrocarbon accumulation and changeable. Therefore, it is necessary to improve the accuracy of seismic reservoir description and reduce the miss of drilling.In order to further study the turbidite reservoir characteristics, the hydrocarbon enrichment patterns and the reservoir description technology in Yi944 wellblock, know more about the rolling exploration potential of the eastern part of Bonan deep area. This paper sequence chronstratigraphic framework using log and seismic combination,and put forward the sedimentary characteristics of channel turbidite sand body; And through the identification of faults and tracing horizons fine and precise, the implementation of each sand group structure character of this region based on frequency of seismic data; Through forward modeling analysis of the turbidite reflection characteristics of sand bodies, confirmed the sensitive seismic attributes and parameters extraction and then extract the sensitive attribute- half energy, the end, combined with hierarchical ancient landform restoration, comprehensive analysis of drilling and drilling reservoir characteristic research, the establishment of a comprehensive prediction for turbidite a series of sand body reservoir exploration and development. Through the application, evaluation of the Bonan deep depression area of Es3 turbidite exploration potential, and points out the direction for exploration and development in the area of channel turbidite oil reservoir, laid the foundation for enhancing oil reservoir built.