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| Distribution of Jurassic strata in Southeastern Depression of Tarim Basin |
| SUN Zhichao1, MIAO Miaoqing1, WANG Jixun2, CHENG Minghua2, BAI Zhongkai1, ZHANG Jinhu1 |
1. Oil & Gas Survey, China Geological Survey, Beijing 100029, China;
2. Korla Branch of BGP Research Institute, CNPC, Korla 841001, China |
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Abstract Southeastern Depression is the southeastern part of Tarim Basin with low exploration degree. Jurassic strata are the main targets for exploration, and it is a key issue to make clear the distribution characteristics of Jurassic in Southeastern Depression for realizing oil and gas discovery. The authors analyzed the latest drilling data combined with the re-acquired and processed seismic, electrical profiles, drilling, well logs and outcrop information after 2015 to study the distribution range and thickness of Jurassic in southeastern Tarim Basin. The results showed that Jurassic strata were widespread in Southeastern Depression of Tarim Basin, while they were absent in the western part of Qiemo bulge locally. Jurassic strata were widely developed in Washixia sag, with huge thickness and broad distribution, and it was obviously thickened toward the piedmont of Altun Mountains. Therefore these strata could be regarded as the targets for oil and gas exploration in Southeastern Depression.
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Received: 09 May 2019
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2019, Vol. 6 
