The Study Of Bedrock Microscopic Reservoir Characteristics In Front Of Aerjin Mountain Of Dongping Aera In Qaidan Basin

In recent years,the bedrock reservoir has become an integral part of the oil and gas exploration Dongping area bedrock reservoir has achieved gratifying progress,but the region's bedrock reservoir research is almost blank.Based on core observation,thin section analysis logging and imaging logging data,As well as the reservoir microscopic study,from the angle of the micro analysis of the bedrock reservoir can more detailed understanding of the reservoir.Dongping area's main lithology are divided into magmatic rock and metamorphic rock,magmatic rocks are mainly granite,gabbro and diabase,metamorphic rocks are mainly gneiss,schist,slate,and small amounts of cataclastic rock;The main reservoir space are matrix pore,fracture and solution pores,the matrix pores is the important factor for stable production,fracture is a good migration pathway and the most important reservoir space.According to the qinghai oil field the evaluation standard for the foundation,,reservoir types for low porosity and low permeability reservoir,proposed in bedrock reservoir type is type ? reservoir In structural high and type ? reservoir in the regional metamorphic.Main factors that affect the bedrock reservoir are: rock types,structure,and diagenesis,and the rock types are fundamental factors,the original rock controls the development of primary pore and secondary pore,the influence of tectonic movement is the most main factor,control the cracks generated,high quality reservoirs are distributed in the fracture development,close distance unconformity surface of bedrock structure on the high place;the diagenesis including fracture,dissolution,filling the role,weathering.These cataclasis,dissolution,weathering of reservoir has a constructive role,filling both constructive and destructive role.Weathering mainly due to the formation of bedrock weathering crust reservoirs,is proposed to the main types of bedrock reservoir.The proposed area of bedrock microscopic reservoir characteristics for bedrock reservoir has guiding significance.