METHOD AND SYSTEM FOR THE SEARCH FOR ANALOGUES OF OIL AND GAS FIELDS Russian patent published in 2021 - IPC E21B49/00 G06F16/215 G06N20/20 

FIELD: oil and gas.

SUBSTANCE: group of inventions relates to the field of searching for analogs of reservoirs with similar properties and filling in the missing values ​​of descriptive attributes of the reservoir. A computer-implemented method for searching for analogs of deposits includes at least the following steps: get the first and second sample of records from at least one database of deposits and their attributes. Moreover, the first sample of records contains deposits of the first type, described by the first group of attributes, and the second sample of records contains deposits of the second type, described by the second group of attributes. The first sample to be marked out is formed; then a second one; the first and second sample to be marked out are marked with the help of at least two experts. Moreover, for each entry in a subgroup, experts mark whether this entry characterizes a deposit, which is an analogue of the target deposit in this subgroup. The first and second training samples are formed from the first and second labeled samples, respectively. The first classifier is trained using gradient boosting using the transformed attributes of the records of the first training sample; the second classifier is trained using gradient boosting using the transformed attributes of the records of the second training sample. Then the type of field is received from a user as well as the values ​​of its attributes to determine its analogues; transforming the obtained attributes for use by the field classifier and searching for analogues using the trained classifier corresponding to the field type; then the user is presented with information about the search results.

EFFECT: increased efficiency of searching for oil reservoir analogs.

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