Ordovician intra-platform shoal reservoirs in the Tarim Basin, NW China: Characteristics and depositional controls

Abstract

Research Article| March 01, 2013 Ordovician intra-platform shoal reservoirs in the Tarim Basin, NW China: Characteristics and depositional controls Zhi-qian Gao; Zhi-qian Gao Key Laboratory for Marine Reservoir, Evolution and Hydrocarbon Accumulation Mechanism, Ministry of Education of China China, University of Geosciences, Beijing 100083, China, gzq@cugb.edu.cn Search for other works by this author on: GSW Google Scholar Tai-liang Fan Tai-liang Fan Key Laboratory for Marine Reservoir, Evolution and Hydrocarbon Accumulation Mechanism, Ministry of Education of China, China University of Geosciences, Beijing 100083, China, ftl@cugb.edu.cn Search for other works by this author on: GSW Google Scholar Bulletin of Canadian Petroleum Geology (2013) 61 (1): 83–100. https://doi.org/10.2113/gscpgbull.61.1.83 Article history received: 05 Mar 2012 accepted: 29 Jan 2013 first online: 12 Jul 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Zhi-qian Gao, Tai-liang Fan; Ordovician intra-platform shoal reservoirs in the Tarim Basin, NW China: Characteristics and depositional controls. Bulletin of Canadian Petroleum Geology 2013;; 61 (1): 83–100. doi: https://doi.org/10.2113/gscpgbull.61.1.83 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of Canadian Petroleum Geology Search Advanced Search Abstract Intra-platform shoal reservoirs are widely developed in the Ordovician of the Tarim Basin, western China and are prospective for hydrocarbon exploration. Early Paleozoic tectonic evolution of the Tarim Basin was one of extension and followed by compression. The dynamic transformation of the regional plate margins caused differentiation of the intra-platform paleogeomorphology, which imposed changes on the development of sedimentary facies contemporaneous with the development of intra-platform shoals. An integrated model for recognition of intra-platform shoal reservoirs was established through outcrop investigation, core observation, logging analysis and seismic data interpretation. Ordovician intra-platform shoals in the Tarim Basin occur as ‘shoal deposits containing small reefs’, ‘shoal deposits covering large reefs’, as well as ‘reef-dominated shoal deposits’. Each of these types tend to dominate at different stratigraphic levels. Few but large intra-platform shoals are developed in the Penglaiba Formation. Large numbers of small-scale intra-platform shoals are widely developed in the lower member of the Yingshan Formation, whereas larger and thicker intra-platform shoals are widely developed in the upper member of the Yingshan Formation. This study indicates that the development of intra-platform shoals is controlled by many factors such as platform structure, sea-level change, paleodepth, and paleogeomorphology, among which the sea-level changes and micro-paleogeomorphology play the most significant role. The shoals are found mainly in highstand system tracts of high-frequency depositional cycles. The ideal locations for the development of intra-platform shoals are over micro-uplifts and facing windward paleoslopes. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.