Abstract

Unconventional reservoirs, specifically shale formations, require stimulation by means of hydraulic fracturing to extract hydrocarbons buried deep beneath the Earth's surface. Stimulation requires fluid and in most cases proppant to enter the wellbore via a pressure-pumping operation to create fractures in tight, hydrocarbon-bearing formations. Currently, there are two dominant methodologies for unconventional completions: plug-and-perf (PnP), and sliding sleeves. PnP requires the use of plugs and perforating guns, which are pumped to designated depths in the well, to create perforations in the casing, allowing fluid to be conveyed into the formation. This method leaves casing permanently perforated and unable to isolate certain portions of the wellbore for future intervention or remediation. In contrast, the use of reclosable sliding sleeves allows operators to selectively function, stimulate, and remediate different portions of the wellbore without introducing inner diameter casing restrictions or reductions. This paper aims to highlight the use of reclosable sliding sleeves not only as a means for primary reservoir stimulation, but also to conduct remedial cement operations in wells.

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