Reservoir And Oil And Gas Distribution Prediction Of Qiketai Formation In Shengnan-Shenquan Area, Turpan-Hami Basin

Good regional structural position,rich oil and gas resources and favorable hydrocarbon accumulation condition in ShengNan-ShenQuan region make the area have good exploration potential.Although the previous exploration of ShengNan-ShenQuan region achieved great success,it faces many difficult problems.Structural reservoirs were mainly target in early exploration,but middle and late period petroleum exploration has trended from structural reservoirs to stratigraphic and structural lithologic reservoirs,so reservoir prediction and distribution zones of oil and gas are the focus of the next step exploration work.This thesis is based on 3D seismic data of ShengNan-ShenQuan region,it has done fine structure interpretation and reservoir prediction for Qiketai group of Jurassic System.Based on previous research results,by means of seismic and geologic horizon calibration,3D seismic fine interpretation,correlation analysis and structural mapping,the structural shape,fracture and trap characteristics are realized:overall structural shape is high in northwest and low in southeast,nose structure and anticline belt are of complete evolution in ShengNan-ShenQuan region.Yanshanian and Himalayan tectonic movement and compressive stress from the north-south direction result in serious tectonic deformation and faults.Most faults are NW-SE strike compressive reverse faults.5 traps are newly discovered in the study area with a total area of 16.46km2.The downhole logging response characteristics of reservoirs in Qiketai group have been analyzed while discovering that normal acoustic impedance can't distinguish lithology effectively,but the compensated neutron curve logs have a better effect.Apply simulated acoustic log reconstruction to study the inversion of target layers,and combin with seismic attributes and hydrocarbon detection technology to reservoir and distribution zones of oil prediction for the target layers.The bottom of Qiketai group develop reservoirs which mainly include the subaqueous distributary channel and channel-mouth bar deposition of the braided delta front subfacies.Sandstone reservoirs in the region are widely developed with good lateral continuity,single sand body is thin but multilayer sand are stacked in the vertical direction.According to reservoir prediction results,analysis of hydrocarbon accumulation condition,control of the reservoir in geomorphology and exploration potential of favorable traps,the thesis clear out the favorable area for exploration andprovide recommendations for exploration wells which lay the foundation for the further exploration and development work in ShengNan-ShenQuan region.