Cover: Oilfield Review Summer 1999
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Editorial: Risk Management Improves Drilling Performance
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A new initiative to enhance drilling performance significantly reduces operational costs and nonproductive time. Through close cooperation between operator and service company, this approach helps provide planning and real-time drilling solutions that avoid stuck pipe, reduce drillstring failures, optimize drilling efficiency, and monitor as well as control borehole stability. This article shows how a risk-management and loss-control framework is used to combine operator knowledge and experience with the technical expertise and drilling measurements provided by Schlumberger to develop surprise-free drilling procedures.
Operating companies report increases in predicted ultimate recovery on the order of 10% through data integration, reservoir simulation and proper development strategies. Reservoir models that draw on all available information must honor data with different scales from many sources to validate interpretations, decrease uncertainty and reduce risk. The best models use independent data sets and validation advances to confirm and constrain multidisciplinary interpretations as much as possible, improving simulation reliability and extracting more value from hard-won formation evaluation and production data.
A new generation of wireline technology is revolutionizing fundamental formation evaluation. In this article, we unravel the mysteries of using real-time environmental corrections and inversions based on forward models to provide high-quality log measurements and interpretations at the wellsite. Field examples illustrate recent innovations such as the HRLA* High-Resolution Laterolog Array tool, which is designed to provide more accurate resistivity measurements in saline borehole environments, and post-logging processing techniques to interpret logs obtained under the most extreme subsurface environmental conditions.
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