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Articles 1 - 5 of 5
Full-Text Articles in Physical Sciences and Mathematics
Chemical Eor, Ibnelwaleed A. Hussein, Yujun Feng, Baojun Bai
Chemical Eor, Ibnelwaleed A. Hussein, Yujun Feng, Baojun Bai
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
No abstract provided.
Making Reliable Shear-Wave Splitting Measurements, Kelly H. Liu, Stephen S. Gao
Making Reliable Shear-Wave Splitting Measurements, Kelly H. Liu, Stephen S. Gao
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
Shear-wave splitting (SWS) analysis using SKS, SKKS, and PKS (hereafter collectively called XKS) phases is one of the most commonly used techniques in structural seismology. In spite of the apparent simplicity in performing SWS measurements, large discrepancies in published SWS parameters (fast direction and splitting time) suggest that a significant portion of splitting parameters has been incorrectly determined. Here, based on the popularly used minimization of transverse energy technique, we present a procedure that combines automatic data processing and careful manual screening, which includes adjusting the XKS window used for splitting analysis, modifying band-pass filtering corner frequencies, and verifying and …
Self-Potential Signals Generated By The Corrosion Of Buried Metallic Objects With Application To Contaminant Plumes, Justin B. R. Rittgers, Andre Revil, Marios C. Karaoulis, Michael A. Mooney, Lee D. Slater, Estella A. Atekwana
Self-Potential Signals Generated By The Corrosion Of Buried Metallic Objects With Application To Contaminant Plumes, Justin B. R. Rittgers, Andre Revil, Marios C. Karaoulis, Michael A. Mooney, Lee D. Slater, Estella A. Atekwana
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
Large-amplitude (>100 mV) negative electric (self)-potential anomalies are often observed in the vicinity of buried metallic objects and ore bodies or over groundwater plumes associated with organic contaminants. To explain the physical and chemical mechanisms that generate such electrical signals, a controlled laboratory experiment was carried out involving two metallic cylinders buried with vertical and horizontal orientations and centered through and in the capillary fringe within a sandbox. The 2D and 3D self-potential (SP) data were collected at several time steps along with collocated pH and redox potential measurements. Large dipolar SP and redox potential anomalies developed in association …
Wettability Alteration Of Sandstone By Chemical Treatments, Yanling Wang, Li Ma, Baojun Bai, Guancheng Jiang, Jiafeng Jin, Zengbao Wang
Wettability Alteration Of Sandstone By Chemical Treatments, Yanling Wang, Li Ma, Baojun Bai, Guancheng Jiang, Jiafeng Jin, Zengbao Wang
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
Liquid condensation in the reservoir near a wellbore may kill gas production in gas-condensate reservoirs when pressure drops lower than the dew point. It is clear from investigations reported in the literature that gas production could be improved by altering the rock wettability from liquid-wetness to gas-wetness. In this paper, three different fluorosurfactants FG1105, FC911, and FG40 were evaluated for altering the wettability of sandstone rocks from liquid-wetting to gas-wetting using contact angle measurement. The results showed that FG40 provided the best wettability alteration effect with a concentration of 0.3% and FC911 at the concentration of 0.3%.
Water, Climate, And Social Change In A Fragile Landscape, William L. Hargrove, David M. Borrok, Josiah Mc C.C. Heyman, Craig E. Tweedie, Carlos Cabrera Ferregut
Water, Climate, And Social Change In A Fragile Landscape, William L. Hargrove, David M. Borrok, Josiah Mc C.C. Heyman, Craig E. Tweedie, Carlos Cabrera Ferregut
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
We present here and in the companion papers an analysis of sustainability in the Middle Rio Grande region of the U.S.-Mexico border and propose an interdisciplinary research agenda focused on the coupled human and natural dimensions of water resources sustainability in the face of climate and social change in an international border region. Key threats to water sustainability in the Middle Rio Grande River region include: (1) increasing salinization of surface and ground water, (2) increasing water demand from a growing population in the El Paso/Ciudad Juarez area on top of an already high base demand from irrigated agriculture, (3) …