The provided assignment is a research paper on hydraulic fracturing, which includes a review of historical developments in the technology, discussions on the environmental impacts associated with it, such as contamination risks and groundwater usage effects. The document also touches upon various studies related to hydraulic fracturing, including those focusing on the mechanics of fracture propagation and the analysis of productivities for horizontal wells in water-bearing tight gas reservoirs. Additionally, the assignment references reports from organizations like Stewart & Stevenson that provide information on hydraulic fracturing equipment and processes. Overall, this document serves as a comprehensive resource on hydraulic fracturing research and applications.
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