Time filter

Source Type

Houston, TX, United States

Tramuto J.A.,Southwestern Energy Company
GPA Annual Convention Proceedings

A discussion on shale gas covers background information on the exploration and production of natural gas; market capitalization; areas of operation; new ventures; improvements in technology, which have brought down costs and increased the scope of resource development; US gas production forecast by type; lead regulatory oversight and enforcement; addressing community concerns; use of stringent industry and government standards on land reclamation, well construction, water management, and pipeline safety; and responsible hydraulic fracturing practices. This is an abstract of a paper presented at the 91st Annual Convention of the GPA 2012 (New Orleans, LA 4/15-18/2012). Source

Cox R.T.,University of Memphis | Gordon J.,Southwestern Energy Company | Forman S.,University of Illinois at Chicago | Brezina T.,University of Memphis | And 4 more authors.
Seismological Research Letters

Aerial photography from the 1940s through 1950s of the Wisconsinan and Holocene portion of the lower Mississippi alluvial valley from 32°N to 34.6°N identifies three previously unrecognized areas that have circular to elliptical tonal anomalies similar in size, shape, and spacing to the aerial photography signature of sand blows previously documented in this region by trenching. Coring, ground conductivity surveying, trenching, sedimentological/soil analysis, and age analysis by 14C and luminescence techniques demonstrate that these three areas are fields of seismically induced sand blows of late Holocene age. The sand blows have a "popcorn" pattern indicative of hydraulic fracturing of surficial clay and a local seismic source. We found evidence for one sand-blow episode in Richland Parish, Louisiana, between 300 and 5,900 yr B.P., for two episodes in Morehouse Parish, Louisiana, that both occurred between 650 and 3900 yr B.P., and for two in Bradley County, Arkansas circa 1400 to 1760 yr B.P. and circa 1050 to 1400 yr B.P. The older buried blow in Morehouse Parish has a large vent several meters wide, which we attribute to lateral spreading rather than hydraulic fracturing, perhaps triggered by a large earthquake. Thus at least three (probably more) paleoearthquakes between 700 and 8,000 years ago caused the sand blows in south Arkansas and north Louisiana, but more data is needed to establish a clear chronology. Based on spatial and temporal relationships, we speculate that the paleoearthquakes that triggered these sand venting episodes accompanied reactivation of the Triassic Saline River fault zone or related faults of the rifted Gulf of Mexico margin. Source

Gawankar K.,Southwestern Energy Company
Oilfield Review

Geologists and petrophysicists use image logs to visualize rocks in situ and determine structural geometry and formation properties. Image data help them analyze reservoir properties such as heterogeneity, sedimentary conditions and structural features, including fractures, folds and faults. Engineers have found that acquiring images in oil-base mud systems is difficult because the insulating properties of oil often renders conductivity-based imaging tools ineffective, especially for fracture analysis. That limitation has been addressed with a newly introduced imaging tool for oil-base mud systems. Copyright © 2015 Schlumberger. Source

Zavala-Araiza D.,University of Texas at Austin | Allen D.T.,University of Texas at Austin | Harrison M.,URS Corporation | George F.C.,Southwestern Energy Company | Jersey G.R.,Consultant
ACS Sustainable Chemistry and Engineering

The natural gas supply chain includes production, processing, and transmission of natural gas, which originates from conventional, shale, coal bed, and other reservoirs. Because the hydrocarbon products and the emissions associated with extraction from different reservoir types can differ, when expressing methane emissions from the natural gas supply chain, it is important to allocate emissions to particular hydrocarbon products and reservoir types. In this work, life cycle allocation methods have been used to assign methane emissions from production wells operating in shale formations to oil, condensate, and gas products from the wells. The emission allocations are based on a data set of 489 gas wells in routine operation and 19 well completion events. The methane emissions allocated to natural gas production are approximately 85% of total emissions (mass based allocation), but there is regional variability in the data and therefore this work demonstrates the need to track natural gas sources by both formation type and production region. Methane emissions allocated to salable natural gas production from shale formations, based on this work, are a factor of 2 to 7 lower than those reported in commonly used life cycle data sets. © 2015 American Chemical Society. Source

Konschnik K.E.,Harvard University | Boling M.K.,Southwestern Energy Company
Environmental Science and Technology

Advances in directional drilling and hydraulic fracturing have sparked a natural gas boom from shale formations in the United States. Regulators face a rapidly changing industry comprised of hundreds of players, operating tens of thousands of wells across 30 states. They are often challenged to respond by budget cuts, a brain drain to industry, regulations designed for conventional gas developments, insufficient information, and deeply polarized debates about hydraulic fracturing and its regulation. As a result, shale gas governance remains a halting patchwork of rules, undermining opportunities to effectively characterize and mitigate development risk.The situation is dynamic, with research and incremental regulatory advances underway. Into this mix, we offer the CO/RE framework - characterization of risk, optimization of mitigation strategies, regulation, and enforcement - to design tailored governance strategies. We then apply CO/RE to three types of shale gas risks, to illustrate its potential utility to regulators. © 2014 American Chemical Society. Source

Discover hidden collaborations