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| Bedrock fracture prediction and pore-fracture overlay analysis: A case study of the Kun 2 block in the Kunteyi gas field |
MA Yuan-Kun1,2( ), WEN Zhong-Lin1,2, LI Ji-Yong1,2, WANG Hai-Cheng1,2, CHEN Fang-Fang1,2, XU Yu1,2, ZHANG Lei1,2, PAN Yi-Hong3 |
1. Exploration and Development Research Institute of PetroChina Qinghai Oilfield Company, Dunhuang 736202, China
2. Key Laboratory of Oil and Gas Geology in Salinized Lake Basin of Qinghai Province, Dunhuang 736202, China
3. PST Service Corp., Beijing 100101, China |
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Abstract This study aims to determine the development of dissolution pores and fractures in the target bedrock reservoir space in the Kun 2 block in the Kunteyi gas field within the Qaidam Basin. The seismic data were classified into 12 attributes in five major categories for fracture prediction and comparative analysis of bedrock reservoirs. The results show that the maximum likelihood attribute aligned highly with the well data, with high vertical and horizontal resolution, superior to curvature, coherence, discontinuity, and similarity attributes. Moreover, the favorable areas for the distribution of bedrock reservoirs were effectively predicted using the dissolution pore-fracture overlay analysis method, providing a basis for subsequent exploitation well deployment.
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Received: 22 October 2024
Published: 22 July 2025
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Top boundary structure of bedrock in Kun 2 block of Kunteyi gas field
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Stratigraphic column of the Lengbei Slope
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Comparison of fracture prediction
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Comparison of predicted fractures in drilled wells with imaging logging and logging interpretation
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Intersection diagram of logging interpretation porosity and seismic prediction fracture strength
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Predictive profiles of fractures in Kun 101, Kun 2-2, Kun 2-X1, Kun 2, and Kun 1-1 wells
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Prediction plan distribution of fractures in the bedrock 0~300 m section of Kunteyi Block
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Cross section of Kun 101, Kun 2-2, Kun 2-X1, Kun 2, and Kun 1-1 wells with overlapping boreholes and fractures
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Distribution plan of segmented holes and fractures in the bedrock of Kunteyi Block
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Distribution plan of hole seam overlay in the 0~300 m section of Kunteyi Block
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Comprehensive evaluation of Kunteyi Block 0~300 m section
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