The Lower Cambrian Xiaoerbulake Formation in the Tarim Basin as a potential carbonate source rock  

作　　者：Miaoqing Miao Zhichao Sun Zongan Xue Miao Miao Kunpeng Jiang Xuefeng Zhang Zhongkai Bai Xiuxiang Lyu Xingui Zhou Yongjin Gao Miao Han Youxing Yang 

机构地区：[1]Oil and Gas Survey,CGS,Beijing,100083,China [2]School of Earth and Space Sciences,Peking University,Beijing,100871,China [3]Institute of Energy,Peking University,Beijing,100871,China [4]State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum(Beijing),Beijing,102249,China [5]School of GeoSciences,China University of Petroleum(Beijing),Beijing,102249,China

出　　处：《Energy Geoscience》2024年第2期40-52,共13页能源地球科学（英文）

摘　　要：The oil and gas exploration of the Middle and Lower Cambrian in the Tarim Basin reveals widely distributed source rocks with the Yuertusi Formation being recognized as high-quality source rocks that are distributed in a rather small range.The Xiaoerbulake Formation that is right under the Yuertusi Formation has also been eyed as potential high-quality source rocks and is studied through analyses focusing on the stratigraphic development,the abundance,type,and maturity of organic matter,and the paleoproductivity of a dark-colored algae dolomite within the formation.The results show that the dolomite is rich in organic matter of mainly types Ⅰ and Ⅱ kerogens.Although reached the high mature to over-mature stage,the dolomite was deposited in an anoxic sedimentary environment featuring a high paleoproductivity level and a high organic carbon burial efficiency,quite favorable for the development of high-quality source rocks.The study provides material evidence to the Middle-Lower Cambrian subsalt source rock-reservoir-caprock combination model for the Tarim Basin.

关 键 词：Source rock Algal dolomite Yuertusi formation Xiaoerbulake formation Tarim basin 

分 类 号：P618.13[天文地球—矿床学]