Abstract
Summary This paper discusses an in-situ-stress evaluation program conducted in the McElroy field in preparation for waterflood realignment. Microfracturing and borehole logging results indicated that the maximum horizontal stress orientation was north-northwest, west-northwest, and north-northwest in the upper, middle, and lower payzone intervals, respectively. Microfracturing proved to be the most reliable and cost-effective technique for in-situ stress evaluation in this heterogeneous reservoir.
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