Logging evaluation of shale oil in Jiyang Depression
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TE122.1

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    Abstract:

    The core analysis and gas logging are universally applied to research the mobility of shale oil,but the role of the logging in evaluating shale oil is not played fully. On the basis of the core analysis and elemental capture spectroscopy (ECS)logging calibration,the logging evaluation method and characterization means of shale oil geological characteristics are established by the logging curve overlap method. The results show that the total organic carbon(TOC)calculated by the improved ΔlogR method is more consistent with core analysis data. There is a good corresponding relationship of logging curve overlap and its combination characteristics with gas logging abnormality,which can qualitatively reflect the mobility of shale oil. With the 2D NMR data of Well BYP5,the fluid occurrence characteristics and oil-bearing properties of shale oil formation are revealed for the first time from the perspective of logging. The quantitative oil-bearing property evaluation method of shale oil formation is determined,and the NMR T2 cut-off value of shale oil movable porosity is obtained to quantitatively evaluate oil-bearing properties. Applications indicate that the logging evaluation results are basically consistent with the core analysis results. The logging curve overlap method and the NMR data can more comprehensively and accurately reflect the oil-bearing properties of shale oil formation. Thus,the role of logging data in shale oil evaluation is fully displayed.

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JIANG Yunjian, LIU Huimin, CHAI Chunyan, WANG Min, YANG Donggen, WU Chunwen, CHEN Xiao. Logging evaluation of shale oil in Jiyang Depression[J]. Petroleum Geology and Recovery Efficiency,2023,30(1):21~34

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  • Received:
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  • Online: February 13,2023
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