--> Abstract: Economic Impact of Oil Geochemistry on West White Lake Field, Louisiana, by L. M. Ross, D. R. McConnell, K. A. Seilhan, and R. L. Ames; #90987 (1993).

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ROSS, LARRY M., Amoco Production Research, Tulsa, OK; D. R. McCONNELL and K. A. SEILHAN, Amoco Production Company, Houston, TX; and R. L. AMES, Amoco Production Research, Tulsa, OK

ABSTRACT: Economic Impact of Oil Geochemistry on West White Lake Field, Louisiana

The discovery well for West White Lake Field was drilled in 1943. Over the last 50 years, at least 12 zones within the Miocene have proven productive. Currently, one zone, the unitized Miocene Bigenerina 3-2 sand is under a waterflood program. The evaluation of that secondary recovery program is the subject of this geochemical evaluation.

The waterflood is reportedly underperforming, therefore well head samples were collected from the 23 producing wells (including 16 wells in the Big 3-2 sand). By characterizing the molecular composition of these oils by whole oil gas chromatography we highlighted areas or wells that require remedial work to improve production.

Six wells from the waterflood unit were not producing the anticipated oil composition. Mechanical problems with the production tubing were discovered in two of the wells; four wells warrant further geological evaluation.

Geochemical evaluation of the produced hydrocarbons offers the geoscientist and engineer another line of evidence to characterize reservoirs.

AAPG Search and Discovery Article #90987©1993 AAPG Annual Convention, New Orleans, Louisiana, April 25-28, 1993.