China University of Petroleum

Zejun Li

Yang Xia

Hanqing Wang

Zhou Zhou

Mian Chen

Xuyang Guo

Yan Jin

Bing Hou

Yunhu Lu

Botao Lin

A modeling method is provided. The modeling method includes: extracting multiple pieces of logging data corresponding to a plurality of logging characteristic parameters at different drilling depths of a sample well, based on a logging information of the sample well; marking the different drilling depths based on a lost circulation information of the sample well to distinguish lost circulation points and non-lost circulation points; and classifying the lost circulation points and the non-lost circulation points by adopting a random forest algorithm, based on the plurality of logging characteristic parameters and the multiple pieces of marked logging data at the different drilling depths, to establish a plurality of corresponding relations between the logging characteristic parameters and a lost circulation or non-lost circulation result, so as to obtain a diagnosis model.

Modeling method and method for diagnosing lost circulation

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Beijing, China

Zejun Li