【摘要】 石南31井区位于准噶尔盆地腹部,井区下白垩统清水河组油藏为一新发现的高产油藏,尚未进行过层序地层学研究。根据三维地震信息、测井响应特征、岩心及岩屑录井资料,首次在清水河组识别出3个层序界面:一是清一段底面,即白垩系与侏罗系的分界面(SB1);二是清一段中KIq11-1与K1q11-2的界面(SB2);三是清二段顶面(SB3)。并根据这三个层序界面,划分出两个三级层序,自下而上为"层序I"和"层序II"。层序I包括清一段的第二砂层组和第一砂层组的K1q11-2,K1q11-3砂层;层序II则包括清一段第一砂层组的KIq11-1砂层和整个清二段。更多还原

【Abstract】 A high production reservoir has been found recently in Qingshuihe Formation(K1q) in Shinan 31 wellblock in the abdomen of Junggar Basin.,and not yet carry through sequence stratigraphy analyzing.According to3-D seismic information,logging response features,core and cutting logging data in Qingshuihe Formation,firstly identify three sequence boundaries: the one is bottom surface of the Member1 of Qingshuihe Formation,also is the division surface of cretaceous between Jurassic(SB1);the one is the interface of KIq11-1 between K1q11-2 in the Member1 of Qingshuihe Formation(SB2);the last one is top surface of the Member2 of Qingshuihe Formation(SB3).According to the three sequence boundaries,Qingshuihe Formation could be divided into two sequences of Ⅲ,it is sequenceI and sequenceII in ascending order.SequenceI contains the second sand bodies and the first sand bodies(K1q11-2,K1q11-3) of the Member1 of Qingshuihe Formation;sequenceII contains the first sand bodies of the Member1 of Qingshuihe Formation and all the Member2 of Qingshuihe Formation.更多还原