Perm Journal of Petroleum and Mining Engineering (Jun 2016)
Discovery of hydrocarbon accumulations formed under natural conditions of occurrence based on field data
Abstract
In order to detect, determine thickness and localize hydrocarbon accumulations there are qualitative and quantitative methods of interpretation still in use. Such methods are not divided into geological criteria and geophysical features which cause certain error. The study is based on the theory of appearance processes and composition formation as well as on conditions of occurrence of oil and gas. Deep structure such as gas-steam-conductive faults and oil-gas-steam-distributing faults of low order were studied. All the features of its determination under natural conditions of occurrence were integrated. Based on listed above and on results of several years of experimental and operating works, carried by other scientists in order to discover hydrocarbon accumulation in geological structure the authors determined and grouped geological criteria and geophysical features. Furthermore, during determination of geological criteria and geophysical features following petrophysical parameters of reservoir properties are determined: porosity, saturation, effective porosity, reservoirs density and speed of seismic wave propagation in the rock, rock and fluid resistivity. It should be noted, that during interpretation of seismic data to discover hydrocarbon migration tame and deep cross-sections as well as simultaneous cross-sections, frequencies and phases were used. The charts of amplitudes, frequencies, phases and its dispersion, decrement and attenuation coefficients that are equivalents to absorption coefficients and differences of elastic vibrations of reflected waves were used. Finally, having these parameters determined geological criteria and geophysical features of discovery of hydrocarbon accumulations under natural conditions of occurrence were grouped.
Keywords
