The Gaolihan Depression Chagannuoer Region Geological Research And Prediction Of Favorable Oil-bearing Zones

Since2005the region has drilled10oil wells, YG2wells and YG6wells has direct showof oil and gas, and gaolihan sag in Erlian Basinhas two oil and13depressions, the indicatorsare ranked, therefore, it is necessaryto continue to carry out the petroleum exploration work,for next step explorationdirection.In this paper, combined with the seismic, drilling, logging, well logging and testing datacollection and analysis. Gao Lihan sag are controlled by fault is more noticeable, Gao Lihanfault and the west fault is to control the chagan Noel subsags sedimentary and evolution ofboundary faults. From the Wells of geochemical data analysis shows that hydrocarbon sourcerock development from2to paragraph al good group1room gradually from a goodhydrocarbon source rock development; Main purpose layer of organic matter type is equallyfrom top to bottom for Ⅱ by Ⅲ-Ⅱ type1to type1-Ⅰ; Chagan Noel subsags purposelayer of sedimentary facies is mainly for the fan delta front and front fan delta; Reservoirporosity and permeability are low porosity, low permeability, plane, the more close to the end,the reservoir physical property is bad; In the aspect of reservoir and caprock, teng1segmentand al group are since the author classifies the type. Based on the geological structure,hydrocarbon source rocks, the sedimentary facies, and the further research of reservoir andcaprock, etc, finally divided into three favorable oil-gas accumulation zones, respectively:YG1-YG9tectonic belt、YG2-YG8tectonic belt and north tectonic belt.