| 塔里木盆地克深5裂缝性有水气藏数值模拟及开发对策研究 |
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| 关键词:numerical simulation fractured gas reservoirs water-bearing gas reservoirs development strategies |
| 基金项目:中国石油天然气股份有限公司攻关性应用性科技专项下属课题“超深层油气藏提高采收率关键技术研究与应用”(编号: 2023ZZ14YJ04) |
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| Study on Numerical Simulation and Development Strategies of the Keshen 5 Fractured Water-bearing Gas Reservoir in the Tarim Basin |
| The Keshen 5 gas reservoir is a fractured, abnormally high-pressure, ultra-low permeability, layered-edge water dry-gas reservoir. Due to the development of fractures, the gas reservoir quickly waters out after development. Thus, performing numerical simulations of water invasion and research on development strategies is the key to improving the recovery rate of the gas reservoir. To describe the reservoir characteristics more thoroughly, an embedded discrete fracture model was used for numerical simulation. In response to the difficulty of historical fitting for fractured gas reservoirs, a combination of sensitivity analysis, production dynamic fitting, and manual and automatic adjustment was adopted to perform the fitting work. The actual water invasion performance of the gas reservoir was fully combined, and attribute fields of key parameters, such as large fractures, matrix, and fracture grid, were adjusted. Finally, the historical fitting conformity rate of the entire area was 91%, and the historical fitting conformity rate of a single well was 86%. Based on the historical fitting results and an analysis of development control factors and taking into account factors such as different gas production rates, drainage methods, drainage scales, and new well potential excavation, 12 sets of extraction plans were designed. The prediction simulation results for 15 years showed that the optimal drainage and gas production plan for the gas reservoir were as follows: The gas reservoir production allocation is 1.05 million cubic meters per day; the old wells at the edge, KeS505, 502, and 503, are used for drainage; KeS5-5 is blocked; and a horizontal well is deployed in the saddle. A directional well is deployed north of KeS5-3, and the final recovery rate is 23.7%. |
| NIE Haifeng,ZHAO Libin,TAN Bei,ZHANG Yongling,ZHANG Yongbin,YANG Jiayi,WANG Rui.2024.Study on Numerical Simulation and Development Strategies of the Keshen 5 Fractured Water-bearing Gas Reservoir in the Tarim Basin[J].Acta Geoscientica Sinica,45(6):1003-1012. |
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