Main Controlling Factors Analysis And Reservoir Prediction Of "Three Low" Oil And Gas Reservoirs In Area X

The yanchang 6 ~ chang8 reservoir in the three-dimensional area of yanchang oilfield is a lithologic trap developed on the tectonic background of yi-shan slope,which is mainly controlled by lithological factors.In view of the development of "three low" reservoirs,especially the horizontal drilling of chang 6 ~ chang 8 oil layer,it can provide more accurate structure and reservoir distribution information.Based on extension set,especially long long 6 ~ 8 reservoir three main target strata in structure,reservoir property,logging evaluation,reservoir prediction and reservoir characteristic classification evaluation standard research,the structure,lithology,fracture development situation and the relationship between oil and gas,oil and gas transportation systems such as control factors of hydrocarbon accumulation,reservoir prediction has carried on the preliminary discussion.The oil-water distribution of chang 6 ~ chang 8 oil layer in yanchang area is controlled by lithology,and there is no unified oil-water interface in the whole area,so the depth of oil bottom varies greatly.Therefore,based on the geological law,the analysis of multiple Wells and oil and gas reservoirs in the region shows that the widely developed structural faults and fractures play an important role in the oil and gas accumulation in the region,but the lithology plays a key role in the accumulation of oil and gas.Therefore,the reservoir in this area belongs to the complex type of oil and gas reservoir whose structure control is mainly auxiliary lithology control.