Industry Article: Improving Shale Gas Production Through Accurate Well Placement

February 2011 World Oil
Publication: World Oil
Publication Date: 02/01/2011

Shale gas reservoirs typically exhibit high levels of heterogeneity. They are usually produced with horizontal wells, steered using simple gamma-ray (GR) measurements correlated with vertical pilot wells in an attempt to achieve maximum reservoir exposure. Detailed examination has revealed that steering results for horizontal wells using averaged GR correlation techniques and subsequent structural modeling yield non-unique solutions. This article presents a case study in the Woodford Shale where the conventional process results in at least three different plausible well placement results. Incorporating an azimuthal density image into well placement analysis provides a single unique answer.

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