The research on fault and structural trap of the Weixinan Sag, Beibuwan Basin, South China Sea
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Summary
This summary is machine-generated.Integrated offshore exploration and development in the Weixinan Sag successfully identified fault-controlled reservoir laws. This research enhanced drilling success rates and boosted oil reserves and production.
Area Of Science
- Geology
- Petroleum Engineering
- Structural Geology
Background
- The Weixinan Sag in Beibuwan Basin is a key area for integrated offshore exploration and development.
- Oil reservoirs are primarily in the Liushagang and Weizhou formations, characterized by complex fault systems and structural traps.
Purpose Of The Study
- To investigate the critical factors of offshore exploration and development integrated technology, focusing on fault research and structural trap effectiveness.
- To establish fault-controlled reservoir laws and identify the dominant fault-controlled reservoir mode.
Main Methods
- Detailed analysis of fault geometry, dynamics, and kinematics, including fault system division.
- Analogical and quantitative studies on structural trap characteristics, fault sealability (lateral and vertical), and oil column height prediction.
- Integration of oil and gas distribution laws with fault system analysis and trap effectiveness research.
Main Results
- Identification of fault-controlled reservoir laws and the dominant fault-controlled reservoir mode within the Weixinan Sag.
- Successful application of fault and trap research in offshore integrated exploration and development.
- Achieved an 82% drilling success rate (37 out of 45 wells), promoting oilfield projects and contributing to reserve and production increases.
Conclusions
- The integrated approach to fault and trap research is crucial for successful offshore exploration and development.
- The established fault-controlled reservoir laws and modes provide a valuable framework for resource assessment and production enhancement.
- This study demonstrates significant contributions to increasing reserves and production in the Weixinan Sag.
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