Speaker: Peter M. Duncan, MicroSeismic, Inc.
Title: Frac-Driven Interactions and Well Spacing: a MicroSeismic perspective
Abstract: The issue of well spacing for optimal economic development remains one of the most important to unconventional development. The solution to the problem has been confounded by the prevalence of frac driven interactions (FDI’s) between primary wells, that were often drilled to hold leases, and secondary wells drilled subsequently. Such interactions have often resulted in loss of production, sometimes permanently, in the primary well and below average production from the secondary wells. In turn this has meant a re-evaluation of EUR on several high-profile developments with a negative impact on market cap for the affected operators. Occasionally these frac hits have also resulted in wellbore damage, even to the extent of losing the well entirely. Interactions between wells have been observed at distances of several thousand feet. It appears that avoiding these interactions altogether is practically impossible. Various schemes for mitigation have been tested and reported upon. After a brief review of this reporting, this paper will present microseismic observations of FDI’s, describe how such data can be used to facilitate well bore spacing decisions and minimize negative well interactions.
-2019 Executive Committee
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