Early Cambrian syndepositional structure of the northern Tarim Basin and a discussion of Cambrian subsalt and deep exploration

作     者：GUAN Shuwei ZHANG Chunyu REN Rong ZHANG Shuichang WU Lin WANG Lei MA Peiling HAN Changwei 

作者机构：Research Institute of Petroleum Exploration&DevelopmentPetroChinaBeijing 100083China Korla Branch of Geophysical Research InstituteBGP Inc.Korla 841000China 

出 版 物：《Petroleum Exploration and Development》 (石油勘探与开发（英文版）)

年 卷 期：2019年第46卷第6期

页      面：1141-1152页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 0808[工学-电气工程] 081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0807[工学-动力工程及工程热物理] 0815[工学-水利工程] 0816[工学-测绘科学与技术] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：Supported by the National Key Research and Development Program of China(2017YFC0603101) Strategic Priority Research Program of the Chinese Academy of Sciences(XDA14010101) Scientific Research and Technological Development Project of PetroChina(2018A-01) 

主　　题：Early Cambrian syndepositional structure bedded chert paleogeography subsalt exploration Lower Cambrian Yurtusi Formation Tarim Basin prototype basin 

摘      要：Using field geological survey,drilling and seismic data,combined with the study of regional tectonic evolution and structural deformation,as well as lithological and sedimentary analysis,we reconstructed the basin filling process and paleo-geography of north Tarim Basin in Early Cambrian,aiming to analyze the factors controlling the distribution and spatial architecture of the subsalt reservoir and source units and to define the favorable exploration *** Late Sinian tectonic activities in the northern Tarim Basin were characterized by different patterns in different areas,which controlled the sedimentary pattern in the Early *** boundary faults of Nanhuaian rift basin in the south slope of Tabei uplift and the north slope of Tazhong uplift became reactivated in the Early Cambrian,forming two NEE and EW striking subsidence centers and depocenters,where the predicted thickness of the Yurtusi Formation could reach 250 *** the Xiaoerbulake period,the weak rimmed platform was developed in the hanging wall of syndepositional *** the Nanhuaian rift system in the Tadong and Manxi areas were uplifted and destroyed in the Late Sinian,and appeared as gently slope transiting toward the subsidence center in the Early *** former had the sedimentary features of hybrid facies platform and the latter had the sedimentary features of ramp *** black shale of the Yurtus Formation in the footwall of syndepositional fault and the reef bank of Xiaoerbulake Formation platform margin in the hanging wall in Early Cambrian constitute a predicable source-reservoir *** activity intensity of syndepositional fault controlled the thickness of black shale and the scale of the reef *** is suggested carrying out high accuracy seismic exploration to determine the location of Early Cambrian syndepositional faults,on this basis,to search the reef bank of Xiaoerbulake Formation along the faults westward,and then drill risk exploration we