Casing/cementing/zonal isolation
This paper highlights nontraditional methods to cure oil-based-mud losses in horizontal wells drilled in unconventional plays.
The authors of this paper write that the use of high-angle wells through anisotropic shale formations represents a promising approach to improving oil recovery while reducing the overall number of wells required.
This paper addresses the deployment of an external protective coating with a rough surface profile in wells identified as susceptible to common cementing issues.
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The most common method used for the placement of cement plugs is the balanced-plug method using drillpipe, tubing, or a combination of both. -
Many good well-construction-technology papers came out last year, as well as a couple on older technologies that either had not been published earlier or had been released and were underappreciated.
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This paper introduces a fit-for-purpose surface-controlled formation-isolation valve (SFIV) designed for the temporary well suspension required for this strategy.
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Deepwater cementing becomes increasingly challenging as drilling operations move to greater water depths and more-remote locations.
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ADMA-OPCO had integrity problems in one of its gas wells, and abandonment was the only option available to restore the integrity of the offshore multiwell jacket and revive adjacent wells.
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In 2012, the number of unconventional tight gas/shale and high-pressure/high-temperature (HP/HT) papers continued to grow. This year, we had some very interesting developments in these and other areas of well construction.
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To maintain zonal isolation throughout the life of a high-pressure/high-temperature (HP/HT) well, the cement sheath must perform reliably at temperatures that can exceed 315°C.
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The Eagle Ford shale in Zavala County, Texas, is similar to many high-carbonate-content oil-shale formations.
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The Granite Wash formation presents several challenges in drilling the build section from a vertical open hole to form a lateral.
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As operators continue to drill into deeper and more-extreme formations, the demand for technologies suited to these environments increases.
