A study, directed at the improvement of hydraulic fracturing treatments performed in the Lobo Wilcox formation in south Texas, is presented. During the study, the performance of numerous gas wells fractured using a single-fluid (organometallic crosslinked) or a multiple-fluid (organometallic and borate crosslinked) technique was determined. During the multiple-fluid treatment (MFT) the organometallic-crosslinked fluid is pumped followed by a borate-crosslinked tail-in fluid.

The field study indicates Lobo Wilcox wells fractured using conventional high-temperature fracturing fluids (organometallic-crosslinked fluids) exhibit poor production in comparison to wells fractured using multiple fluids. Improved fracturing fluid recovery and improved well performance were observed in wells fractured with multiple fluids. The improved well performance is attributed to less conductivity impairment by the borate tail-in fracturing fluid. This technique can be used in any high-temperature well to "economically" improve fracture conductivity.

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