METHOD FOR INCREASING THE INFORMATIVE VALUE OF TRACER SURVEYS IN PETROLEUM AND GAS DEPOSITS Russian patent published in 2022 - IPC E21B47/11 

FIELD: petroleum industry.

SUBSTANCE: invention relates to a method for increasing the informative value of tracer surveys in petroleum and gas deposits. The method includes planning the surveys by selecting the object of survey, a specific experimental site including injection boreholes and production boreholes. Candidate boreholes for tracer surveys are selected by means of an algorithm, which calculates, based on the analysis of the dynamic data on borehole operation, the coefficients of mutual influence of pairs of boreholes by multiple linear regression MLR and the Capacitance-Resistance Model CRMIP. By means of a machine learning algorithm, a combination of threshold values for the mutual influence coefficients is selected, and a decision rule is determined for the best match with the results of prior tracer surveys at the site of the deposit. The decision of the algorithm for each injection–production pair of boreholes issues a "yes" or "no" answer. If the algorithm issues the answer "yes" for a pair of boreholes, a tracer is injected into the injection borehole and sampling is conducted in the production borehole in order to identify the presence of indicators in the extracted products, and if the algorithm issues the answer "no", the pair of boreholes is excluded from the survey.

EFFECT: optimisation of tracer surveys and increase in the efficiency of field works.

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