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Technical Papers: An Update of Recent Production Responses Obtained from Devonian Shale and Berea Wells Stimulated with Nitrogen Foam (with Proppant) Versus Nitrogen-Only, Pike Co., KY

Society: SPE
Paper Number: 84834
Presentation Date: 2003
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Abstract

This study updates SPE paper 77464, which compared 97 nitrogen-foam (with proppant) stimulations versus 120 nitrogen-only completions performed in the 1990s in Pike County, Kentucky.

Ninety-three of the 97 foam stimulations are located outside of a relatively high permeability area in the northwestern portion of the study area. These 93 wells have been compared with 14 recent foam stimulations drilled throughout 2002 and the first quarter of 2003.

All wells are owned and operated by Equitable Production Company. They are located in Pike County, Kentucky, and are completed with two stages in the Devonian Shale and Berea formations. Our results indicate that the latest foam treatments outperform the earlier foam stimulations by a noteworthy percentage. This improved performance is most likely due to high-quality post frac clean-up methods and subsequent expert well maintenance.

There has been no significant change in stimulation design for the new wells when compared with the earlier completions. However, the latest stimulations are using a consistent design per well, whereas the earlier stimulation designs tended to vary from well to well. In addition, line and annular pressures are similar and reservoir qualities are analogous between the earlier wells and new completions.

The operator is continuing to pump foam with proppant in wells throughout the study area. The results of this paper are significant for Appalachian basin operators utilizing nitrogen foam treatments because they quantify the positive influence of rapid well clean-up and first-class well maintenance.

This is the first paper published to update results over such a large study area.

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