Browsing by Subject "Field Study"
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Item Above-zone pressure monitoring at Cranfield, MS(7th IEAGHG Monitoring Network Meeting, 2011-06-07) Mickel, Tip; Hovorka, SusanItem Analysis of time lapse seismic signal analysis for an EOR and CCS site, Cranfield, MS(82nd Annual Meeting of the Society for Exploration Geophysics,, 2012-11-04) Ditkof, Julie; Meckel, Tip; Hovorka, Susan; Caspari, Eva; Pevzner, Roman; Urosevic, MilovanThe Cranfield, MS EOR field site has been under CO2 flood by Denbury Onshore, LLC since 2008. More than 3 million tons of CO2 has been injected. Time-lapse 3D surface seismic data displayed a readily observable signal related to CO2 injection into the lower Tuscaloosa Formation. The intensity and the spatial distribution of time-lapse (TL) signal required further analysis. For that purpose, we carried out fluid substitution analysis, followed by volumes cross-equalization, well ties, and acoustic impedance inversions. A Gassmann workflow was used to predict the response to injected CO2 at two well locations. The 31F-2 observation well, located in a detailed area of study (DAS), was used to compare the results of time-lapse sonic data with fluid substitution results. The objective was to predict a postinjection saturation curve. A second well, well 28-1, was used to help predict an acoustic impedance change in the reservoir to use for subsequent inversion. Finally, a model based inversion was performed to quantify the impedance change between two cross-equalized timelapse data sets. The acoustic impedance (AI) difference obtained through the inversion process is higher than that predicted for in the 28-1 injection well. The time-lapse AI signal is however in agreement with the large velocity change computed from the time delay along the marker horizon below the reservoir.Item Assessing potential impacts of CO2 leakage on shallow groundwater quality in the SECARB Phase III early test site using single-well push-pull tests(2012 AGU Fall Meeting, 2012-12-03) Yang, Changbing; Mickler, Pat; Reedy, Bob; Scanlon, BridgetItem Assessing potential impacts of CO2 upward migration on drinking groundwater quality at the SECARB Phase III early test site(2013 Carbon Storage RD Project Review Meeting, 2013-08-20) Yang, C.; Hovorka, S. D.; Trevino, R. H.Item Case Study: Monitoring an EOR project to document sequestration value(2008) Hovorka, Susan D.Item Detection of anthropogenic CO2 in dilute groundwater: field observations and geochemical modeling of the Dockum aquifer at the SACROC oilfield, West Texas, USA(9th Annual Conference on Carbon Capture & Sequestration, 2010-05-10) Romanak, Katherine D.; Smyth, Rebecca; Yang, Changbing; Hovorka, SusanItem Detection of CO2 leakage in overlaying aquifers using time lapse compressibility monitoring(12th Annual Conference on Carbon Capture Utilization & Sequestration, 2013-05-13) Hosseini, Seyyed Abolfazi; Zeidouni, MehdiItem Evaluating time-lapse borehole gravity for CO2 plume detection at SECARB Cranfield(11th Annual International Conference on Greenhouse Gas Technologies, 2012-11-18) Hovorka, Susan; Dodds, Kevin; Krahenbuhl, Richard; Reitz, Anya; Li, YaoguoItem Evaluation of CO2, He, C1-C5 gaseous hydrocarbons at an engineered CO2 injection, Cranfield, Mississippi(9th Annual Conference on Carbon Capture & Sequestration, 2010-05-10) Romanak, Katherine; Zhang, Tongwei; Gilbert, Kimberly; Yang, Changbing; Bennett, Philip; Hovorka, SusanItem Executive summary: Recent results of the SACROC groundwater geochemistry summary(Federal Requirements Under the Underground Injection Control (UIC) Program for Carbon Dioxide (CO2) Geologic Sequestration (GS) Wells – Notice of Data Availability and Request for Comment (EPA-HQ-OW-2008- 0390-0297), 2008) Romanak, Katherine D.; Smyth, Rebecca C.; Yang, Changbing; Hovorka, Susan D.; Nicot, Jean-Philipe; Lu, JieminItem Frio brine storage experiment—lessons learned(8th International Conference on Greenhouse Gas Control Technologies, 2013-06-19) Hovorka, Susan D.The Frio Brine pilot is a closely monitored, small-volume (1,600 tons), short-duration experiment using injection of CO2 into high-permeability brine-bearing sandstone to test the feasibility of geologic sequestration. The experiment differed from the geoscience and engineering community’s extensive previous experience in injection of CO2 and other fluids into the subsurface. It was, from inception to completion, focused on assessing monitoring strategies. An important objective of this study is to convey lessons learned to the next generation of developers of geologic CO2-injection-pilot projects. For the experiment, CO2 was injected for 10 days 1500 m below the surface. The evolution of the plume was successfully monitored with diverse tools, including downhole pressure and temperature, wireline logging, fluid sampling, cross-well techniques, and vertical seismic profiling. The injection period was brief and the formation was steeply dipping with high permeability; therefore the nineteen months since injection period takes us well into the post injection phase of monitoring. As predicted, CO2 remains stored within the formation. Surface leak detection techniques have thus far failed to detect any clear evidence of leakage except immediately above the injection zone, probably through engineered systems.Item Geochemical characterization of shallow groundwater at the Cranfield aquifer and numerical simulation: Can pH and carbonate parameters be used to detect potential CO2 leakage at geological CO2 sequestration sites?(9th Annual Conference on Carbon Capture & Sequestration, 2010-05-10) Yang, Changbing; Romanak, Katherine; Hovorka, Susan; Linder, Jeff; Smyth, Rebecca; Trevino, Ramon; Paine, Jeffrey; Holt, Bob; Smith, L. T.; Xia, Yunju; Lu, JieminItem Geochemical investigation of shallow groundwater over SACROC oilfield(Southwest Regional Partnership on Carbon Sequestration Phase II Annual Meeting, 2008-10-22) Romanak, Katherine