地震沉积学在准噶尔盆地玛湖西斜坡区三叠系百口泉组的应用

Application of Seismic Sedimentology in Triassic Baikouquan Formation of Western Mahu Slope of Junggar Basin

地震沉积学主要是利用三维地震信息和现代地球物理技术对沉积体系、沉积相平面展布以及沉积发育史进行研究。准噶尔盆地玛湖西斜坡紧邻生油凹陷,成藏条件十分有利,油气资源丰富。但勘探目的层较深,储层非均质性强、储层较薄。通过对准噶尔盆地区域构造条件和沉积条件的研究认为,该区油藏类型多为构造岩性油藏,为此在准噶尔盆地玛湖凹陷西斜坡区三叠系百口泉组开展地震沉积学应用方面的研究,并通过对一系列地层切片的研究,结合钻井岩心信息进行动态解释,明确研究区沉积相特征。

Seismic sedimentology mainly uses 3D seismic information and modern geophysical technology to study sedimentary systems,sedimentary facies spread and its evolution history.The western Mahu slope close to the oil-generated sag in the vicinity of northwest margin fault belt of Junggar basin and has the favorable hydrocarbon accumulation conditions and rich oil and gas resources.But there is deep exploration bed of interest,strong heterogeneity of reservoir,and relatively thin reservoir.Based on study of regional structural and sedimentary conditions in the Junggar basin,the structural traps are not well-developed,but the composite traps such as lithological and stratigraphical trap are favorable developed.Accordingly,we carry out seismic sedimentology on the western Mahu slope of Junger basin in the 3D seismic area.We use a series of layer slices and drilled core information to dynamically interpret the target zone and determine the sedimentary facies in the study area.