论文部分内容阅读
准噶尔盆地玛湖凹陷斜坡区三叠系百口泉组由于各区带钻井地层划分方案不统一且缺少等时概念,制约了对斜坡区有利相带展布的整体认识。通过井—震结合搭建全区层序地层格架,整体识别了百口泉组内部3个四级层序界面。在此基础上按照“点—线—面”的识别思路,利用岩心和测井资料实现点、线层序地层划分和沉积体系组成特征的认识,利用地震沉积技术实现由线至面分析层序演化规律及沉积亚相边界刻画。研究明确了玛湖凹陷斜坡区有利前缘相带面积约为13 000km2,且在凹陷中心区也大面积发育前缘相带,拓宽了斜坡区勘探面积和场面。
The Baikouquan Formation in the Triassic Baihequan Formation in the Mahu Sag of Junggar Basin is not uniform due to the lack of isochronous concepts in strata division of drilling zones in the Junggar Basin, restricting the overall understanding of the favorable facies belt distribution in the slope area. Through the combination of well and seismic to build the sequence stratigraphic framework of the whole area, three four-level sequence boundaries within the Baikouquan Formation are identified as a whole. On this basis, based on the recognition of “point-line-surface ”, the core and logging data are used to realize the stratigraphic division of point and line sequences and the compositional characteristics of sedimentary system, and the seismic deposition technique is used to realize the analysis from line to surface Evolution of Sequence and Deposition of Sedimentary Subfacies Boundary. The study shows that the facies belt of the favorable front in the slope area of Mahu depression is about 13 000 km 2, and the foreland facies belt is also widely developed in the central area of the depression, broadening the exploration area and the scene of the slope area.