【摘要】 在对钻井、录井、测井、地震和各种测试资料的综合分析基础上,对沙三段层序地层格架进行了系统的研究。共识别出4个层序界面,3个三级层序,并在各三级层序内识别出低位体系域、湖扩体系域和高位体系域。认为深凹及控凹断裂边缘3个体系域发育完整,而板桥及歧北次凹斜坡带仅发育退积型湖扩体系域和进积型高位体系域。在此基础上,建立了歧深地区层序地层发育模式——陆相单斜断坡带型(西断东缓超)地层格架,为研究区有利储集体的预测提供了基础。更多还原

【Abstract】 The Qishen area is a promising region for oil and gas exploration located in the Qikou depression.In this study,the characteristics and the stratigraphic framework of the Qishen area are analyzed based on comprehensive analyses of the drilling,well logging,and seismic investigations.4 sequence boundaries and 3 third-grade sequences can be identified.In addition,the low-stand,transgressive and high-stand system tracts can be recognized in each of the third-grade sequence.However,only the retrogradational regressive and progressive high-stand system tracts were observed in the Banqiao sag and the slope belt of the Qibei subsag.Finally,a model for the regional sequence stratigraphic framework is suggested.更多还原