Rainer G. Schaefer

TL;DR: In this article, a series of twenty-six German high volatile B to low volatile bituminous coals of Upper Carboniferous age by recently refined analytical methods (flow-blending extraction, medium pressure liquid chromatography, HPLC, glass capillary gas chromatography and spectral fluorescence microscopy) reveals that yield and composition of soluble organic matter are strongly controlled by rank.

TL;DR: In this article, four shallow boreholes were drilled in the Hils syncline, northern Germany, in order to determine quantitatively the amount of hydrocarbons generated and expelled during maturation of a typical kerogen-type-II-bearing source rock.

TL;DR: In this article, the diffusion coefficients of light hydrocarbons through the water-saturated pore space of shales were determined for the diffusion of lighthydrocarbon through the shales: methane (2.12 × 10-6), ethane (1.86 to 1.13), propane (5.55 × 10 −7), iso-butane (3.01 × 10−7), n-pentane, n-hexane, and n-decane.

TL;DR: In this paper, the authors applied non-isothermal first-order reaction kinetics to the resulting hydrocarbon evolution curves activation energy distributions between 46 and 70 kcal/mol and pre-exponential Arrhenius factors are obtained by an iteration method.

TL;DR: A detailed organic geochemical study of over 150 samples from two cores with a total combined length of 320 m (1,050 ft) through sequences of interbedded source rock-type shales (0.84% Rm maturity) and reservoir sandstones allowed recognition and quantification of a number of migration effects as discussed by the authors.