Distribution Regularity And Controlling Factor Of Oil Reservoir In Southern Gu Long Putaohua Reservoir

Southern Gulong Putaohua reservoir is located in southern of Qijia-Gulong depression and Daqing placanticline of songliao basin, and shows the "three noses and two depressions" tectonic framework. Southern Gulong Putaohua reservoir in different tectonic positions show different types of oil reservoirs, water distribution characteristics for the reservoir this difference distribution characteristics. The paper Putaohua reservoir for the main object of study, throughing study of tectonic units, fracture characteristics, the development features of reservoir, oil and water distribution characteristics and so on, to summary of different tectonic units of reservoir types and oil-water distribution, combined with comprehensive analysis on main control factors, establish advantageous area partition of oil accumulation patterns and optimization method.Based on study of division of tectonic unit and reservoir development characteristics, we analysis of 189 wells in the study area, and determined the reservoir types and distribution characteristics. In center of Golong syncline center mainly forms lenticular of sandstone reservoir, and in the edge of Golong syncline forms sandstone updip reservoir, and lenticular sandstone reservoir and fault-lithologic reservoir. The maoxing syncline mainly forms micro structural reservoir from PⅠ4 layer to PⅠ6 layer. The Xinzhan nose structure and Xinzhao nose structure mainly form structural-fault reservoir, but their oil-water distribution are different because of there different reservoir characteristics. In slope belt, it forms fault-lithologic reservoir,structural-fault reservoir and sandstone updip reservoir in different relation of formation and fault and reservoir development characteristics.By means of the study of evaluation of source rock, oil and gas migration channel, Sand connectivity of sand,we summed up the Southern GuLong zone reservoir formation mode and accumulation mechanism :(1) in Golong syncline and maoxing syncline mainly controlled by high quality reservoirs;(2)in nose structure it forms structural reservoir segmentation by fault;(3)in Xinzhan slope and Xinzhao slope belt it forms fault-lithologic reservoir by fault sealing or micro structural reservoir controlled by reversal effect;(4)in Yingtai slope it forms sandstone updip reservoir. It provides a theoretical basis for the study area in the future exploration and development of next.