| 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 |
| 投稿时间：2023-12-01 修订日期：2023-12-17 点此下载全文 |
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| 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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| 中文摘要:克深5气藏是一个裂缝性异常高压特低渗层状边水干气气藏,由于裂缝发育,气藏在开发之后快速见水,开展水侵数值模拟及开发对策研究是该气藏提采的关键,为了更好描述储层特征,采用嵌入式离散裂缝模型进行数值模拟,针对裂缝性气藏历史拟合难度大的问题,采用敏感性分析-生产动态拟合相结合、手工调整-自动化调整相结合的思路开展拟合工作,充分结合气藏实际水侵动态,通过调整大裂缝,基质与裂缝网格属性场等关键参数,最终实现了全区历史拟合符合率为91%,单井历史拟合符合率为86%。基于历史拟合结果及开发主控因素分析,综合考虑不同采气速度、排水方式、排水规模、新井挖潜等因素,设计12套提采方案,预测模拟20年结果优选出气藏排水采气方案为：气藏配产105万方/天,边部老井克深505、502、503井排水,克深5-5井堵水,鞍部部署一口水平井,克深5-3井北部部署一口定向井,最终采出程度为23.7%。 |
| 中文关键词:数值模拟 裂缝性气藏 有水气藏 开发对策 嵌入式 |
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| Study on Numerical Simulation and Development Strategies of Keshen 5 Fractured Water-bearing Gas Reservoir in Tarim Basin |
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| Abstract: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 experiences water after development. Conducting numerical simulation of water invasion and research on development strategies is the key to the recovery of this gas reservoir. In order to better describe the reservoir characteristics, an embedded discrete fracture model is used for numerical simulation to address the difficulty of historical fitting for fractured gas reservoirs, the fitting work was carried out using a combination of sensitivity analysis production dynamic fitting and manual adjustment automation adjustment. The actual water invasion performance of the gas reservoir was fully combined, and key parameters such as large fractures, matrix, and fracture grid attribute fields 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 historical fitting results and analysis of development control factors, 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 predicted simulation results for 20 years showed that the optimal drainage and gas production plan for gas reservoir was: 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 in the north of KeS5-3, and the final recovery rate is 23.7%. |
| keywords:Numerical simulation Fractured gas reservoirs Water-bearing gas reservoirs Development strategies Embedded |
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