METHOD FOR PREDICTING POST-FRACKING PRESSURE BUILD-UP IN SHALE
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Jun 27, 2017
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Jun 28, 2016
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During fracking processes, fluid is injected into the injection wells to cause micro-fractures in the shale. Contact between shale and water causes the development of micro-fractures. Given the deep location of the injection wells, the water is under high pressure that can build up over time and could potentially cause tremors. Based upon experiments on Pierre shale, it has been determined that the appearance of micro-fractures in shale begin with the saturation of capillaries, followed by ionic and diffusive transport of water into the shale clays. Using this discovery, a method for predicting the post-fracking pressure build-up in shale is disclosed.
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