Abstract: A coreflood method that treats a consolidated porous medium, e.g., as a bundle of capillaries of various sizes as a surfactant alternating gas (SAG) method of foam injection. An electrical resistivity tool is used to monitor and measure in-situ changes in water and gas saturation while a high-resolution pressure transducer measures the pressure drop across the sample. A consolidated rock sample pre-saturated with a surfactant solution is injected with a small slug of gas and then a surfactant solution is injected until a steady state flow is observed. Graphical analysis of the saturation and pressure profile in each cycle allows the estimation of water saturation, saturation of the mobile and trapped fractions, and a corresponding pressure drop. Similarly, graphical analysis of the saturation and pressure profile in multiple SAG cycles generates a data set as a function of pore size, water saturation, and capillary pressure.

Abstract: A coreflood method that treats a consolidated porous medium, e.g., as a bundle of capillaries of various sizes as a surfactant alternating gas (SAG) method of foam injection. An electrical resistivity tool is used to monitor and measure in-situ changes in water and gas saturation while a high-resolution pressure transducer measures the pressure drop across the sample. A consolidated rock sample pre-saturated with a surfactant solution is injected with a small slug of gas and then a surfactant solution is injected until a steady state flow is observed. Graphical analysis of the saturation and pressure profile in each cycle allows the estimation of water saturation, saturation of the mobile and trapped fractions, and a corresponding pressure drop. Similarly, graphical analysis of the saturation and pressure profile in multiple SAG cycles generates a data set as a function of pore size, water saturation, and capillary pressure.

Abstract: A well-bore monitoring process involving logging the temperature of a soil, rock, and brine mixture present in a carbonate formation continuously, and simultaneously logging the resistivity of the soil, rock, and brine mixture in the carbonate formation continuously. The logged temperature and the logged resistivity are interpreted whereby concurrent events in the logged temperature and the logged resistivity identify dissolution of rock into the mixture and precipitation of scale from the mixture. The simultaneous logging of the temperature and the resistivity is conducted in a well-bore in the carbonate rock formation.

Abstract: A well-bore monitoring process involving logging the temperature of a soil, rock, and brine mixture present in a carbonate formation continuously, and simultaneously logging the resistivity of the soil, rock, and brine mixture in the carbonate formation continuously. The logged temperature and the logged resistivity are interpreted whereby concurrent events in the logged temperature and the logged resistivity identify dissolution of rock into the mixture and precipitation of scale from the mixture. The simultaneous logging of the temperature and the resistivity is conducted in a well-bore in the carbonate rock formation.