Discovered in 1973, the Lobo Trend is one of the largest gas-producing regions in the United States. Extending throughout Webb County and into Zapata County, this play has produced more than 6.4 tcf gas equivalent from more than 4,200 completions.
The hallmark of Lobo geology is the complexity caused by high-density faulting, a regional unconformity and multiple localized unconformities. Further adding to the complexity is the fact that some of the faulting does not extend through the regional unconformity. Operators typically find the Lobo sand package between 8,000 feet and 13,500 feet, with a fault-block size averaging 60 acres and a net pay thickness from 50 to 150 feet. The Lobo sands generally are recognized as tight gas sands with permeabilities ranging from 0.1 md to 10 md. The sands require fracture stimulation to produce at economic rates.
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