Journal of Asian Earth Sciences 156 (2018) 75–89 Contents lists available at ScienceDirect Journal of Asian Earth Sciences journal homepage: www.elsevier.com/locate/jseaes Full length article Anomalies of natural gas compositions and carbon isotope ratios caused by gas diﬀusion – A case from the Donghe Sandstone reservoir in the Hadexun Oilﬁeld, Tarim Basin, northwest China a,b a,b, a,b c a,b Yangyang Wang , Jianfa Chen , Xiongqi Pang , Baoshou Zhang , Yifan Wang , a,b a,b a,b Liwen He , Zeya Chen , Guoqiang Zhang State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Changping District, Beijing 102249, China College of Geosciences, China University of Petroleum, Beijing 102249, China Research Institute of Exploration and Development, Tarim Oilﬁeld Company, PetroChina, Korla, Xinjiang 84100, China ARTICLE I NFO ABSTRACT Keywords: Natural gases in the Carboniferous Donghe Sandstone reservoir within the Block HD4 of the Hadexun Oilﬁeld, Tarim basin Tarim Basin are characterized by abnormally low total hydrocarbon gas contents (< 65%), low methane con- Hadexun oilﬁeld tents (< 10%) and low dryness coeﬃcients (< 0.5), and a reversal of the normal trend of carbon isotope ratios, 13 13 13 13 Donghe sandstone reservoir showing δ C methane (C )>
Journal of Asian Earth Sciences – Elsevier
Published: May 1, 2018
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