TAILIEUCHUNG - unconventional gas shales development technology and policy issues

Tham khảo sách 'unconventional gas shales development technology and policy issues', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Unconventional Gas Shales Development Technology and Policy Issues Anthony Andrews Coordinator Specialist in Energy and Energy Infrastructure Policy Peter Folger Specialist in Energy and Natural Resources Policy Marc Humphries Analyst in Energy Policy Claudia Copeland Specialist in Resourcesand Environmental Policy Mary Tiemann Specialist in Environmental Policy Robert Meltz Legislative Attorney Cynthia Brougher Legislative Attorney October 30 2009 Congressional Research Service 7-57IM R4W94 CRS Report for Congress----------- Prrpurrd fi r A em tm and Commiitea o Congress Unconventional Gat Shale DcudopHcnt Technology and Policy It tact Summary In the past he oil aid gas industry considered gas locked in light impermeable shale uneconomical to produce. However advances in directional well drilling aid reservoir stimulation have dramatically increased gas production from unconventional shales. The United Slates Geological Survey estimates that 200 trillion cubic fed of natural gas may he technically recoverable from these shales. Recent high natural gas prices have also stimulated interest in developing gas shales. Although natural gas prices fell dramatically ill 2009. there is 111 expectation that the demand for natural gas will increase. Developing these shales comes with some controversy. though. The hydraulic fracturing treatments used to stimulate gas production from shale have stirred environmental concerns over excessive water consumption. drinking water well contamination and surface waler contamination from both drilling activities and fracturing fluid disposal. The saline flowback water pumped back to the surface alter the fracturing process poses a significant environmental management challenge in the Marcellus region. Tlx flowbuck s high content of total dissolved solids TDS and other contaminants must he disposed of or adequately treated before discharged 10 surface waters. The federal Clean Waler Aci and stale laws regulate the discharge .

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