Late Ordovician palaeogeomorphology and its sedimentary facies characteristics in central Tarim uplift
Peng Li1,3, Liu Xiao-ping2, Lin Chang-song1, Liu Jing-yan1, Yang Xiao-fa1, Wang Hai-ping1, Li Huan-pu1
1. School of Energy Resources, China University of Geosciences, Beijing City, 100083, China;
2. Faculty of Natural Resource and Information Technology, China University of Petroleum, Changping District, Beijing City, 1002249, China
Abstract：The palaeogeomorphology and its sedimentary facies in central Tarim I fault belt is the major factor to control the development of Late Ordovician platform margin and large-scale reef reservoir in central Tarim area,looking for similar reef development belt is important for exploration in this area. Seismic reflection structure in Upper Ordovician sedimentary system was analyzed,the sediment interface which is the closest to paleo-uplift top and is easy to track was selected as palaeo-water level,and the palaeogeomorphology for central Tarim uplift and its nearby area in pre-Upper Ordovician sediment was recovered and it was divided into 6 units,inner-platform uplift,inner-platform gentle slope,platform slope,shelf slope,shelf break and deep sea basin,and the local plateau facies,open plateau facies,platform edge facies,open shelf facies and deep sea trough basin facies were developed in it. The studies show that like central Tarim I fault belt the inner-platform gentle slope belt has similar palaeogeomorphology and sedimentary facies characteristics,and it mainly distributes in south slope of the central Tarim uplift and in the eastward extending area of Hetian river,and along the western Tumuxiuke fault belt and the two flanks of Shuntuoguole low-uplift,it may be an important target for reef reservoir exploration.
彭莉, 刘小平, 林畅松, 刘景彦, 阳孝法, 王海平, 李换浦. 塔中隆起晚奥陶世古地貌及其沉积相特征[J]. 石油地球物理勘探, 2009, 44(6): 767-772.
Peng Li, Liu Xiao-ping, Lin Chang-song, Liu Jing-yan, Yang Xiao-fa, Wang Hai-ping, Li Huan-pu. Late Ordovician palaeogeomorphology and its sedimentary facies characteristics in central Tarim uplift. OGP, 2009, 44(6): 767-772.
