Strike-slip fault is well-developed in Tarim basin, faults together with karst caves developed along the faults in deeply buried Ordovician carbonate is main reservoir in this area. Accurate prediction of these faults and karst caves is crucial for petroleum exploration. Different seismic attributes are applied to predict multiscale faults and karst caves, large scale faults (>1/4λ) are identified based on seismic discontinuity, while medium scale faults (>1/100λ and <1/4λ) are detected using maximum curvature attribute. Principal Component Analysis (PCA) and unsupervised clustering are utilized to analyze multiple attributes, to categorize the attributes into distinct classes, allowing for the ranking of fault and the subsequent delineation of fracture lineaments. The karst caves are characterized using the maximum amplitude gradient in horizontal direction (MAGH). The study culminates in the characterization of the fault-controlled karst cave reservoirs within the deep Ordovician carbonates by integrating the prediction results.
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SEG/AAPG International Meeting for Applied Geoscience & Energy
August 26–29, 2024
Houston, Texas
Multiscale faults and karst caves prediction in deep Ordovician carbonate in Tarim Basin, China Available to Purchase
Yanyang Chen;
Yanyang Chen
Sinopec Key Laboratory of Seismic Elastic Wave Technology, Petroleum Exploration and Production Research Institute, Sinopec
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Hong Zhang;
Hong Zhang
Sinopec Key Laboratory of Seismic Elastic Wave Technology, Petroleum Exploration and Production Research Institute, Sinopec
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Yu Zhang
Yu Zhang
Sinopec Key Laboratory of Seismic Elastic Wave Technology, Petroleum Exploration and Production Research Institute, Sinopec
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Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, Houston, Texas, August 2024.
Paper Number:
SEG-2024-4094649
Published:
August 26 2024
Citation
Chen, Yanyang, Zhang, Hong, and Yu Zhang. "Multiscale faults and karst caves prediction in deep Ordovician carbonate in Tarim Basin, China." Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, Houston, Texas, August 2024. doi: https://doi.org/10.1190/image2024-4094649.1
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