Interpretation and Application of Borehole Image Logs in a New Generation of Reservoir Models for a Cluster of Fields in Southern Oman
Ajay Samantray, Martin Kraaijveld, Waleed Bulushi, Laurent Spring, 2010. "Interpretation and Application of Borehole Image Logs in a New Generation of Reservoir Models for a Cluster of Fields in Southern Oman", Dipmeter and Borehole Image Log Technology, M. Pöppelreiter, C. García-Carballido, M. Kraaijveld
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This chapter highlights the value of borehole image (BHI) and dipmeter logs in modeling channelized reservoirs, particularly when fully integrated with core and regional geological understanding. To constrain a new generation of static and dynamic reservoir models for a cluster of southern Oman fields, 19 km (11.8 mi) of dipmeter and BHI logs were interpreted by various contractors. Integration of the results of the structural, facies, and paleotransport interpretations significantly contributed to the quality and robustness of the new generation of reservoir models. This had a profound impact on the petrophysical evaluation models, seismic integration, static reservoir modeling, development concepts, and the well and reservoir management strategy.
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Borehole imaging is among the fastest and most accurate methods for collecting high resolution subsurface data. Recent breakthroughs in acquisition, tool design, and modeling software provide real-time subsurface images of incredible detail, from the drill bit straight to a workstation. Associated interpretation workflows offer the high level of detail that is needed to make operational decision and to increase the predictability of subsurface models. Many exploration and production companies have acquired a wealth of dipmeter and image log data. The data are readily available and provide, for example the orientation of fractures and fluvial channels in space. Further applications of borehole imaging technology include matrix and fracture characterization, pore-type partitioning, geosteering, and in-situ stress determination. Exciting new applications are found in enhanced oil recovery, carbon dioxide sequestration, and geothermal projects. In addition, borehole image data are paramount to unlocking unconventional plays such as shale gas and coal-bed methane. AAPG Memoir 92 portrays key applications of dipmeter and image log data across the exploration and production life cycle. (Continued)