Casing/cementing/zonal isolation
This paper describes the evolution of the operator’s initial PWC (perforate, wash, and cement) abandonment projects performed in deepwater Brazil.
The authors reach conclusions that the industry should define a standard testing method to improve swelling performance, including validation of repeatability, to complement existing guidelines.
This year, we observed a notable increase in activity centered on physical technologies, including cementing tools, zonal isolation barriers, and cement evaluation systems.
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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. -
The Eagle Ford shale in Zavala County, Texas, is similar to many high-carbonate-content oil-shale formations.
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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 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.
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