gPVT

GeoMark Research has performed a crude quality study to establish ranges of oil quality for the different oil types found in the Gulf of Mexico. Average ranges of quality parameters were determined for different source types, levels of thermal maturity, degrees of biodegradation, and percentage of oil family mixing. The study statistically compared oil quality parameters in GeoMark's GOMOILTM database (e.g., %S, ppm Ni & V, API gravity, SARA, GC wax factor) with selected engineering-based oil quality measurements (i.e., viscosity, API gravity, bubble point and GOR).

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Solids - Global

GeoMark Research has performed an investigation of the relationship between different oil types (i.e. different source environments, thermal maturities, and degrees of biodegradation) and paraffin and asphalt stability. We have analyzed a suite of 220 oil samples which represent the various petroleum systems represented in GeoMark's collection of 10,000 oils. These results were correlated to GeoMark's existing geochemical database to determine if it is possible to predict solids problems based on the petroleum system providence and oil character, and to ascertain what effect biodegradation or mixing of petroleum types has on wax or asphaltene stability.

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Solids - Gulf of Mexico

GeoMark Research has performed an investigation of the relationship between different Gulf of Mexico oil types (source environment, thermal maturity, and biodegradation) and paraffin and asphalt stability. We are analyzing a suite of oil samples which represent the various petroleum systems in the Gulf. These results will be correlated to GeoMark's existing geochemical database to determine if it is possible to predict solids problems based on the petroleum system providence in the deepwater GOM, and to ascertain what effect biodegradation or mixing of petroleum types has on wax or asphaltene stability

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C7 Study

A global collection of over 370 crude oil samples representing more than 80 petroleum systems of various ages and source rock types was analyzed for light hydrocarbons using ultra high-resolution gas chromatography. The results were evaluated primarily with respect to the C7 interpretive schemes of Mango (1987, 1990, 1994) and BeMent et al. (1994). Light hydrocarbon parameters of Thompson (1983) were also considered. The usefulness and limitations of light hydrocarbons in 1) performing oil/oil/condensate correlation studies; 2) determining post-generative alteration effects (e.g., fractionation during migration, water washing, mild biodegradation); 3) estimating thermal maturities of oils; and 4) predicting source rock depositional environments were assessed. In addition, the effects of sample handling and light-end evaporation during storage were addressed.

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