宁夏地区构造单元划分及油气勘探有利区评价

Structural unit partition and favorable evaluation of oil and gas exploration area in Ningxia

通过对宁夏地区28条区域地震剖面的收集和解释,厘定了该地区主要的8条区域断裂的具体位置,规模和断裂性质,在此基础上自东向西划分了鄂尔多斯盆地本部、西缘冲断带、六盘山弧形冲断带、六盘山断陷带及定西盆地等二级构造单元。并通过地震资料和钻井资料摸清了该地区三叠系延长组及侏罗系延安组地层残留厚度,结合构造、沉积、烃原岩等因素圈定了红井子、彭阳、同心东南等勘探有利区。

To determine the specific location,size and nature of fracture of 8 main regional fractures by testing the division of structural units in Ningxia region and the evaluation of favorable area for oil and gas exploration.On the basis of the information collected,secondary structural units were divided from east to west：the Ordos Basin,West Fate Thrust Belt,Liupan Mountain Arc Thrust Belt,Liupan Mountain Down-faulted Zone and Dingxi Basin. Through the seismic and drilling data,ascertain the residual layer thickness of triassic and Jurassic in this region.By analysis of structure mentioned above,sedimentation hydrocarbon original rock and other factors,delineate the Hongjingzi,Pengyang and Tongxin southeastward favorable areas for exploration.