METHOD OF GEOCHEMICAL MONITORING OF DEVELOPMENT OF SHALLOW RESERVOIRS OF SUPER VISCOUS OILS Russian patent published in 2018 - IPC E21B49/00 G06F19/00 G06G7/48 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the field of development of oil fields with injection of superheated water vapor into the reservoir, in more detail – to laboratory methods of joint research of core and oil proper, dependence of the ratio of methyldibenzothiophene isomers contained in the core and oil, the construction of two-dimensional and three-dimensional geochemical models, can be used in the development of deposits of predominantly super viscous oil and bitumen. Method consists in: selecting at least three core samples from different sections of the deposit through the same spatial intervals; the core samples are ground, the ground samples of the core are extracted with a solvent, the solvent is distilled off to obtain a bitumen, a hydrocarbon fraction is extracted from the bitumen. Using liquid-adsorption chromatography, qualitative identification of chromatography-mass spectrometric peaks by the mass spectra of the obtained hydrocarbon fraction is performed using chromatography-mass spectrometric analysis. Intensity of the peak of 1-methyldibenzothiophene, the intensity of the peak of 4-methyldibenzothiophene and the ratio of the peaks of 1-methyldibenzothiophene and 4-methyldibenzothiophene are determined. Based on the results of the obtained ratios, 2D and 3D models of the field are built in the core samples using software developed for the claimed method, take samples of oil from production wells, determine the ratios of 1-methyldibenzothiophene and 4-methyldibenzothiophene, identical to the core, add the obtained ratios of 1-methyldibenzothiophene and 4-methyldibenzothiophene, determined in the oil samples, to the pre-built geochemical model of the deposit, and construct 2D and 3D models of the deposit. Form 2D and 3D models of the field and formulate conclusions on the assessment of the directions of probable oil inflows.

EFFECT: technical result consists in creating a method for monitoring the development of shallow reservoirs of super viscous oils by providing the ability to control the development of the steam chamber.

1 cl, 9 dwg