CASE STUDY OF THE WILCOX (LOBO) TREND IN WEBB AND ZAPATA COUNTIES, TX.
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The Wilcox (Lobo) trend of Webb and Zapata counties, TX, is a series of geopressured, low-permeability sands with average depth from 5, 000 to 12,000 ft left bracket 1525 to 3660 m right bracket . More than 1,000 wells have been drilled in this prolific trend during the last 10 to 12 years. Although actively developed earlier, the trend became even more attractive after its classification by the Federal Energy Regulatory Commission (FERC) as a 'tight' gas formation. This paper presents the results of several years of study involving the geologic history, completion methods, massive hydraulic-fracture (MHF) stimulation treatments, reservoir evaluation, and numerical analysis of hydraulically fractured wells in this trend, all of which illustrate the application of this modern technology.
author list (cited authors)
Robinson, B. M., Holditch, S. A., & Lee, W. J.