The impact of capillary imbibition and osmosis during hydraulic fracturing of shale formations
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Most shale formations typically do not produce without hydraulic fracture stimulation. Therefore, in the development of shale formations, hydraulic fracturing is widely applied which has led to the U.S. shale revolution. During a hydraulic fracturing treatment of gas-bearing shales, it is reported that longer shut-in time results in a good initial gas production rate. However, a large percentage of the fracturing fluid remains unrecovered. The cause of this is believed to be capillary imbibition and osmosis in the shale where fluid is imbibed into the shale and trapped inside the pores. In ...