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HETEROGENEITY EVALUATION OF SHALE IN THE FIRST MEMBER OF QINGSHANKOU FORMATION IN CHANGLING SAG, SONGLIAO BASIN: A Case Study of JYY1 Well |
ZHANG Mai1, TANG You-jun2, XU Xing-you3, BAI Jing3, LI Hong-bo2 |
1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China; 2. School of Resources and Environment, Yangtze University, Wuhan 430100, China; 3. Oil and Gas Resources Survey Center, CGS, Beijing 100083, China |
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Abstract Shale evaluation is an important part of oil-gas geochemistry research and the basis for understanding potential of oil-gas resources. Taking the shale in the first member of Qingshankou Formation in JYY1 well in Changling Sag as object, the paper evaluates the heterogeneity on the basis of organic characteristics and well logging curves. It is considered that the shale mainly belongs to Types I and II of kerogens, in low mature-mature stage. The characterization model of reservoir heterogeneity and grading evaluation of shale show that the dark shale in the first member of Qingshankou Formation is mainly Level-II resource, partly Level-I and a little Level-III, and the overall resource level of source rocks in the upper member is better than that in the lower member of Qingshankou Formation.
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Received: 09 May 2021
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