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| Main Progress and Achievements of the Permo-Carboniferous Petroleum Prospective Survey in Yine Basin and its Surrounding Areas |
| LU Jin-cai1, CHEN Gao-chao1, LI Yu-hong1, WEI Xian-yang1, ZHAO Xing-min2, DANG Ben3, CHEN Jian-fa4, WEI Jian-she1, JIANG Ting1, LIU Jian-li5, BO Jian-jun6, YANG Gao-yin7, SHI Ji-zhong1, HAN Wei1, LI Wei1 |
1. Xi’an Center of Geological Survey, China Geological Survey, Xi’an, Shaanxi 710054, China;
2. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037,China;
3. Chang’an University, Xi’an, Shaanxi 710054,China;
4. China University of Petroleum Beijing, Beijing 102249, China;
5. Geophysical & Geochemical Exploration Team of Shaanxi Geology & Mineral Exploration Development Bureau,Xi’an,Shaanxi 710043,China;
6. Wuhan Center of Geological Survey, China Geological Survey, Wuhan, Hubei 430223, China;
7. Xi’an West Approaches Geophysical Technology Development Co. Ltd., Xi’an, Shaanxi 710054, China |
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Abstract As a production-study-research team, we solved the key problems affecting the petroleum geological conditions, and petroleum resources potential evaluation of the Permo-Carboniferous strata in Yingen-Ejina basin. Several new propositions about the formation and evolution mechanism of the basin, the distribution of sedimentary system and sedimentary facies, and source rocks have been established based on the theory of basin mountain coupling, as well as the geological and geophysical technology. The Yingen-Ejina and its surrounding area is a typical rift basin formed in Permo-Carboniferous period, and the source rocks are mainly deposited in the neritic shelf environment of Late Carboniferous and Early Permian. We found many sets of large thickness, stable lateral distribution, with little regional metamorphism, and mature-to-high-mature source rocks in the Permo-Carboniferous formation, accompanied by medium-to-high abundance marine organism and II type kerogen. Geochemical characteristics of natural gas and crude oil from the Upper Paleozoic weathered crust have significant relation with that of the Carboniferous source rocks. In addition, we forecasted the prospecting potential, favorable prospecting areas, and the relative benefit areas in the Permo-Carboniferous formation.
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Received: 15 October 2014
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2014, Vol. 1 
