DAANZAI Jurassic Evaluation Of Oil And Gas Exploration Blocks Favorable

Early results show that hydrocarbon resources of Jurassic of central Sichuan basin are rich, only resources of Da’anzhai and Lianggaoshan can be more than1billion tons, and proven rate is still very low compared with other oilfield, which fully reflects Jurassic of central Sichuan basin there are still a large potential for exploration and development.Jurassic includes five sets of producing reservoir:Zhenzhuchong, Dongyuemiao, Da’anzhai, Lianggaoshan and Shaximiao t, which Da’anzhai segment for the main oil producing zone.Recently, oil exploration in central Sichuan basin is facing more and more difficult in oil yield, in order to ensure stable production yield, which is an urgent need for finding a new favorable succeed blocks.Although Da’anzhai reservoirs in Guihua, Jinhua and Lianchi region are already high level of exploration, but Longgang, Yingshan and Shuanghe area are lower level of exploration,, in addition, old blocks of Yilichang, Xiaotongchang, Liushu and Mingyue, there are also some exploration deployment space, which requires to provide reliable deployment of geological basis for the next step oil exploration and development by deepening geological understanding.Combination of core, logging, seismetic, testing for oil and development performance data, on the basis of existing research results, this paper carry out seven research work including with stratigraphic characterization, lithofacies analysis, conditions of source rock, reservoir characteristics and distribution, structure features characterization, reservoir and crack seismic prediction and evaluation of oil and gas.Studies suggest that Da’anzhai Member is self-generating and self-preserving reservoir, favorable sedimentary facies control the distribution of oil and gas, high-energy shell debris banks and fracture system control oil and gas accumulation, with macroscopic characteristics of a large area of oil.The research is to further implement rolling exploration and development potential of Daanzhai in the new district and old district in central Sichuan basin, and proposes six favorable exploration blocks for increasing crude oil production.