Insights into Khuff Oil Rim Development in Sultanate of Oman from Extensive Drilling and Well Testing Operations

Tingting Zhang, Arun Kumar, Rashid Al Maskari, Maryam Musalami, Sumaiya Habsi
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Abstract

The Yibal Khuff project is a mixed oil-rims, associated gas, and non-associated gas development in highly fractured tight carbonate reservoirs. Rock types and fractures vary widely with significant contribution to flow. In the east segment of the field, 22 horizontal oil producers targeting K2 reservoir have been pre-drilled and tested extensively. The integration of well logs, borehole image data (BHI), well test data and production logs provide key insights into reservoir productivity and the development of a robust well and reservoir management plan, ready for start-up of the field in 2021. A log-based approach was used to classify the reservoir into three main rock types (RRT). Fractures were classified, and high impact fractures were identified. Reservoir flow profile based on noise and temperature logs was established and used in combination with fracture data and cement bond logs in understanding flow conformance and behind casing flow. A large variation in productivity index has been observed, from tight to highly productive wells. Different ways have been explored to establish the link between productivity index, fracture production, and matrix production by rock types. This is the first full field development in the Khuff formation in Sultanate of Oman. The results will benefit a wider audience. A holistic approach was taken to explore the link between well deliverability and nature of a complex geology. The outcome is a robust operating envelope and well, reservoir and facilities management (WRFM) plan, clearly driven by understanding of subsurface risk and opportunities.
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通过大量的钻井和试井作业,对阿曼苏丹国Khuff油环开发的见解
Yibal Khuff项目是一个高度裂缝性致密碳酸盐岩储层的油气、伴生气和非伴生气混合开发项目。岩石类型和裂缝变化很大,对流动的贡献很大。在油田东部,针对K2油藏的22个水平井已经进行了预钻和广泛的测试。测井、井眼图像数据(BHI)、试井数据和生产测井的整合为油藏产能提供了关键信息,并制定了稳健的油井和油藏管理计划,为该油田2021年的投产做好了准备。采用基于测井的方法将储层分为三种主要岩石类型(RRT)。对骨折进行分类,确定了高冲击性骨折。建立了基于噪声和温度测井曲线的油藏流动剖面图,并结合裂缝数据和水泥胶结测井曲线来了解流动一致性和套管流动情况。从致密井到高产井,产能指数变化很大。人们探索了不同的方法来建立生产力指数、裂缝产量和岩石类型之间的联系。这是阿曼苏丹国Khuff地层的第一个全油田开发项目。研究结果将惠及更广泛的受众。采用整体方法来探索复杂地质性质与油井产能之间的联系。其结果是一个强大的作业包线和井、油藏和设施管理(WRFM)计划,显然是由对地下风险和机会的理解驱动的。
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