Gas and Water Distribution in Tight Sandstone Reservoirs in China
Author Information
Author(s): Yang Zhen, Zhou Jinsong, Chen Jiahao, Cheng Wei, Jing Shuai
Primary Institution: Natural Gas Research Institute of Shaanxi Yanchang Petroleum (Group) Company, Ltd.
Hypothesis
What are the controlling factors for gas-water distribution in tight sandstone gas reservoirs?
Conclusion
The study identifies key factors influencing gas-water distribution and suggests potential exploration targets for tight gas sandstone reservoirs.
Supporting Evidence
- The study area covers approximately 10,000 km2 and includes various geological formations.
- Gas wells accounted for 84% in Shan 1, indicating a high concentration of gas in that area.
- Hydrocarbon generation intensity was found to be a key factor controlling gas-water distribution.
- Two periods of gas accumulation were identified, suggesting a complex geological history.
Takeaway
This study looks at how gas and water are distributed in certain rock layers in China, helping us understand where to find more gas.
Methodology
The study used rock eval pyrolysis, sedimentary structure analysis, gas migration studies, and well logs to examine gas-water distribution.
Limitations
The study is limited by insufficient seismic data and the complexity of geological conditions.
Digital Object Identifier (DOI)
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