50 results about "Hydrogen index" patented technology

The use of time-lapsed NMR diffusivity measurements in an observation well is disclosed. The observation well is cased in the zone of interest with non-magnetic and non-conductive casing that is invisible to the NMR tool. Second, because NMR measurements have a dead zone in front of the antenna depending on the spatial variation of the fixed magnet strength, for example about 2.7 inches, a distance between the casing and the formation is reduced to less than the dead zone length by drilling the observation well at small deviation of about 5° and running the casing without centralizers. Both the casing and the pad-type NMR tool will follow the low side of the borehole, ensuring the measurement volume of the NMR tool is inside the formation and beyond the annulus. With the appropriate observation well completion, time-lapse diffusivity measurements with pad-type NMR tools can address several shortcomings in the current practice of monitoring EOR processes that rely upon changes in density and hydrogen index (HI). Various uses of NMR imaging in wells cased with non-metallic casing are also disclosed.

Methods are provided for improving the yield of aromatics during conversion of oxygenate feeds. An oxygenate feed can contain a mixture of oxygenate compounds, including one or more compounds with a hydrogen index of less than 2, so that an effective hydrogen index of the mixture of oxygenates is between about 1.4 and 1.9. Methods are also provided for converting a mixture of oxygenates with an effective hydrogen index greater than about 1 with a pyrolysis oil co-feed. The difficulties in co-processing a pyrolysis oil can be reduced or minimized by staging the introduction of pyrolysis oil into a reaction system. This can allow varying mixtures of pyrolysis oil and methanol, or another oxygenate feed, to be introduced into a reaction system at various feed entry points.

A method and system for evaluation of a hydrocarbon-bearing shale formation employs a data processing system that defines a response model that relates first data representing measured petrophysical properties of the shale formation at a given location to second data representing volume fractions for a particular set of formation components at the given location. The first data includes hydrogen index at the given location, and the particular set of formation components of the second data include a number of mineral components and a number of hydrocarbon-bearing components. The hydrocarbon-bearing components include at least one kerogen component. A computation solver processes the response model along with the first data to solve for the second data. The solved second data representing the volume fraction of the at least one kerogen component is processed to derive at least one ratio that is indicative of kerogen maturity at the given location.

The invention provides a high-over mature decayed mud type marine shale original hydrogen index and organic carbon recovery method, which belongs to the technical field of oil and gas geochemistry research, and realizes the high-over mature decayed mud type marine shale original hydrogen index and organic carbon content recovery under the condition of considering the influence of the paleo-productivity and land source input. The method comprises the steps of selecting the high-over mature rotten mud type marine shale in a research area as a target shale sample, determining the content of organic carbon, the content of free hydrocarbon and the content of pyrolytic hydrocarbon at present, and calculating the potential of hydrocarbon generation; determining the total phosphorus content and the aluminum content, and calculating the autogenous organic phosphorus content; selecting a shale sample in an immature-low mature stage in the same layer system as a target shale sample as a referenceshale sample; and obtaining the lowest hydrogen index and the highest hydrogen index of the reference shale sample, and recovering the original hydrogen index and the original organic carbon contentby taking the lowest hydrogen index and the highest hydrogen index as references and utilizing the ratio of the content of the autogenous organic phosphorus to the content of the total phosphorus.