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基于钻井的测井和录井资料、岩芯资料,以及三维地震资料,通过层序地层学和沉积学分析,揭示了塔里木盆地哈拉哈塘地区上泥盆统东河塘组与下石炭统巴楚组之间为角度不整合接触。该地区东河塘组和巴楚组的角砾岩段分别相当于一个三级层序,分别命名为东河塘层序(SQd)和巴楚层序(SQb),两者之间呈不整合接触。其中东河塘层序由海侵体系域(TSTd)、高位体系域(HSTd)和下降体系域(FSTd)构成,且在地震、录井和测井资料上均可识别。巴楚层序在录井和测井资料上可识别出海侵体系域(TSTb)和高位体系域(HSTb),但在地震资料上只能识别它的层序界面。巴楚层序与东河塘层序的地层间存在明显的交角,水平距离1km落差2.6 m,交角为0.0081°,上泥盆统东河塘层序顶部地层明显遭受剥蚀,在研究区东南部它的高位体系域明显减薄,下降体系域(FST)地层缺失。
Based on well logging and logging data, core data and 3D seismic data of drilling wells, the sequence of sequence stratigraphy and sedimentology analysis reveals that the Donghutang Formation and the Lower Carboniferous of the Upper Devonian in Halahatang area, Tarim Basin Bachu group for the point of contact between the unconformity. The breccia sections of Donghengtang Formation and Bachu Formation in this area are equivalent to a third-order sequence, respectively named Dongdangtang sequence (SQd) and Bachu sequence (SQb) Integrated contact. The sequence of Donghetang is composed of transgressive system tract (TSTd), highstand system tract (HSTd) and descending system tract (FSTd), and it can be identified on seismic, logging and well logging data. The Bachu sequence identifies the transgressive system tract (TSTb) and the highstand system tract (HSTb) on logging and well logging data, but only identifies its sequence boundaries on the seismic data. The Bachu sequence and the Donghengtang sequence stratigraphic layer have obvious intersections with a horizontal distance of 1km and a drop of 2.6 m with an intersecting angle of 0.0081 °. The top strata of the Upper Devonian East Hetang Formation obviously eroded. In the southeast of the study area, Its highstand system tract is significantly thinner and its descent system tract (FST) is missing.