A method for selecting potential infill locations in the East Texas Cotton Valley Tight Gas Play

Conference · Wed Sep 01 04:00:00 EDT 1982 · Soc. Pet. Eng. AIME, Pap.; (United States)

OSTI ID:5394397

Tison, J K; Agarwal, R G; Rosepiler, M J; Schlotman, B W

To fully develop producing acreage in low permeability gas plays, infill reserves must be assessed and development areas must then be identified. Currently in Texas, at least 25 major tight gas plays have been recommended for tight gas formation designation to the Federal Energy Regulatory Commission, and at least 10 of these have been approved for incentive gas pricing. In the East Texas Basin alone, there are at least 10 major field areas in a tight gas sand play. A technique for selecting potential infill locations is outlined in this paper. Critical reservoir and fracture parameters are investigated by determining each parameter's effect on the incremental reserves from an infill well. The most important parameters are: formation flow capacity, hydrocarbon pore volume, fracture length, and pay continuity. These parameters are used to obtain simulated rate data for well groups from a tight gas reservoir simulator. Recoverable gas is determined from a plot of the simulated data as scalar curves relating well rate and cumulative production data to time, normalizing the curves to the above critical parameters. Potential infill reserves are assessed for East Texas Cotton Valley wells using the results from the above curves in an expression for incremental infill reserves. The variation of incremental reserves with fracture length for varying permeabilities is investigated to obtain an economic limit on incremental reserves for a general area and to determine the range of permeabilities justifying reduced well spacing.

• Research Organization: Amoco Production Co.
• OSTI ID: 5394397
• Report Number(s): CONF-820927-
• Conference Information: Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE11022
• Country of Publication: United States
• Language: English

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030300* -- Natural Gas-- Drilling
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