METHOD OF QUANTITATIVE PREDICTION OF HYDROCARBONS RESOURCES Russian patent published in 2011 - IPC G01V9/00 

FIELD: oil and gas production.

SUBSTANCE: boundaries of reference and predicted sections are chosen on corresponding structural base of oil-and gas bearing complex. There are determined initial specific densities of hydrocarbon reserves of chosen reference sections. At least two originally geological parametres, related to presence of oil-and-gas content, are selected for reference and predicted sections; each parametre is divided into value ranges (classes). Regions, determined by each of said classes and including sets of said geological parametres of a corresponding class, are selected within the boundaries of both sections. There are determined areas of the said regions on the reference and predicted sections correspondingly. Specific density of hydrocarbons reserves is evaluated for each of said areas of the reference sections. For said areas of the reference sections there is established dependency between sets of geological parametres and specific densities of hydrocarbon reserves corresponding to them. On base of obtained dependency there are calculated specific densities of hydrocarbon reserves in each reference section. Obtained values of specific densities of hydrocarbons reserves are compared with reference values of specific densities of reserves in the reference sections. When meaningful dependence is obtained, there are determined specific densities of hydrocarbon reserves of predicted sections for selected areas. There are used values of average specific densities of hydrocarbon reserves obtained in the reference sections for each class of geological parametres and the said dependence of calculated specific densities of hydrocarbon reserves in reference sections upon their reference values.

EFFECT: raised reliability of prediction.

5 dwg