<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Cotton Valley Imaging Project\r\nPhase IV\r\nCompletion of Microseismic Mapping\r\nof the\r\nPhase I and II Hydraulic Fractures\r\nWells CGU21-10 and CGU21-09"^^ . "Microseismic monitoring was conducted for three stages of hydraulic fracture completions of\r\nwells CGU21-10 (Phase 1) and CGU21-09 (Phase 2) in May and July, 1997, respectively.\r\nARCO wrote two reports summarizing the acquisition and field analysis of the Phase-1 and -2\r\nmicroseismic data (Withers and Dart, 1997a; Withers and Dart, 1997b). The Phase 1 preliminary\r\nmapping results of ARCO were also presented in Walker (1997).\r\nARCO mapped subsets of the data collected in the field using their process of visually matching\r\ncalculated wavefront curves with full-array waveform displays. Based on an operator moving a\r\ngraphical display of a trial event location, a single event’s final location is stored when the\r\noperator finds an acceptable match of the corresponding display of computed and observed\r\narrival times. Los Alamos, The Engineering Seismology Group Canada (ESG), and Sandia each\r\nseparately mapped different subsets of the Phase-1 data and presented preliminary results at the\r\nDecember, 1997 meeting of the Cotton Valley Imaging Consortia. The ESG analysis also include\r\ncharacterization of the microearthquake source parameters (Urbancic and Zinno, 1998). At the\r\nsame meeting, ARCO presented their mapping results of the Phase-2 data. A number of\r\nproblems or discrepancy were identified that warranted a more thorough investigation of the data\r\nand the various mapping techniques employed. After two preliminary studies investigating the\r\nasymmetry of fracture growth of the Phase-1, Stage-2 treatment (Rutledge, 1998) and a reevaluation of the single-well locations of the Phase-2 data (Urbancic, 1998), the Cotton Valley\r\nConsortia, under GRI management, funded both Los Alamos and ESG to complete the\r\nmicroseismic mapping and analysis of source parameters for the entire Phase-1 and -2 data sets.\r\nThese efforts constitute Phase IV of the Cotton Valley Imaging Project and include the following\r\ntasks:\r\n1. Calculation of event locations using inversion techniques for the Phase 1 and 2\r\nhydraulic fractures (over and above previously located events).\r\n2. Determination of source parameters for the above located events.\r\n3. Confirmation of results through joint analysis of data subsets.\r\n4. Evaluation of velocity and array geometry effects on event location and source\r\nparameter determinations.\r\n5. Visualization of results and associated location errors.\r\nPart I of this report covers the microearthquake location analysis and involves tasks 1, 3, 4, and\r\n5; Part II covers the analysis of source parameters and involves tasks 2, 3, 4 and 5."^^ . "1999-11" . . . "Gas Research Institute"^^ . . . . . . . . . "James T."^^ . "Rutledge"^^ . "James T. Rutledge"^^ . . "Ted"^^ . "Urbancic"^^ . "Ted Urbancic"^^ . . "Los Alamos National Laboratory, GeoEngineering Group / EES-4"^^ . . . "Engineering Seismology Group Canada, Inc., 1 Hyperion Court, Kingston, Ontario, Canada,"^^ . . . . . . . "Cotton Valley Imaging Project\r\nPhase IV\r\nCompletion of Microseismic Mapping\r\nof the\r\nPhase I and II Hydraulic Fractures\r\nWells CGU21-10 and CGU21-09 (Text)"^^ . . . . . "14.pdf"^^ . . . "Cotton Valley Imaging Project\r\nPhase IV\r\nCompletion of Microseismic Mapping\r\nof the\r\nPhase I and II Hydraulic Fractures\r\nWells CGU21-10 and CGU21-09 (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "Cotton Valley Imaging Project\r\nPhase IV\r\nCompletion of Microseismic Mapping\r\nof the\r\nPhase I and II Hydraulic Fractures\r\nWells CGU21-10 and CGU21-09 (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Cotton Valley Imaging Project\r\nPhase IV\r\nCompletion of Microseismic Mapping\r\nof the\r\nPhase I and II Hydraulic Fractures\r\nWells CGU21-10 and CGU21-09 (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Cotton Valley Imaging Project\r\nPhase IV\r\nCompletion of Microseismic Mapping\r\nof the\r\nPhase I and II Hydraulic Fractures\r\nWells CGU21-10 and CGU21-09 (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Cotton Valley Imaging Project\r\nPhase IV\r\nCompletion of Microseismic Mapping\r\nof the\r\nPhase I and II Hydraulic Fractures\r\nWells CGU21-10 and CGU21-09 (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #2170 \n\nCotton Valley Imaging Project \nPhase IV \nCompletion of Microseismic Mapping \nof the \nPhase I and II Hydraulic Fractures \nWells CGU21-10 and CGU21-09\n\n" . "text/html" . . . "Other-additional study" . . . "Cotton Valley" . . . "Unconventional hydrocarbon extraction" . .