The Study On Characteristics Of Yan 9 Reservoir And Favorable Area Prediction In HongDe Area

In this paper,in the west of Huanjiang Oilfield,we study the deposition rules of drilling,drilling,testing and 3 D seismic data,evaluate the reservoir,evaluate the reservoir and combine the production conditions.According to the sedimentary sequence characteristics of Jurassic strata,the fine division and comparison of yan 9 strata in Hongde area were completed.The structure of the study area shows that a series of near-east-west nasal ridges and nasal concave structures were developed on the basis of the overall westward monoclinic,with large deformation degree and fracture development in the central and eastern regions.The study area belongs to the delta plain phase,with the sand body spreading along the northwest to southeast direction.The lithology of the sand body in extension 9 in Hongde area is mainly lithic quartz sandstone and feldspar debris sandstone,and the pore types include intergranular hole,intergranular dissolution hole,dissolution hole,intercrystalline hole and microcracks.The 9 section of Hongde area mainly experienced compaction pressure dissolution,cementation and dissolution.The study shows that the target layer is in stage A.The comprehensive classification and evaluation of logging reservoirs was conducted in the study area and divided into 4 types of reservoirs.Based on the three-dimensional seismic and logging method,the three-level geological control mode is proposed,the secondary control unit is structure and sediment phase,and the tertiary control unit is high-quality sand reservoir.According to the above studies and combined with the actual production situation of the research area,multi-factor comprehensive evaluation of the favorable areas was conducted,the evaluation classification standard of favorable areas was established,and 4 favorable areas were selected to provide certain guidance for the subsequent exploration and development of the research area.