Improving the efficiency and quality of well drilling largely depends on improving the quality of information received. The quality of decisions made during drilling also substantially depends on the quality of information. Widely used in recent years in world practice, mud logging in the process of drilling allows us to solve a number of problems in the drilling process, when information about the section of the well being drilled is missing or is available in a limited amount. The application of the results of the complex of geological, geophysical and technological research allows us to study more deeply the section and thereby improve the quality of decisions.
The article discusses ways to improve the quality of information and obtain more extensive information about the drilled rock, which allows us to divide the section into homogeneous intervals. For this purpose, an approach known from fuzzy logic was applied to find the appropriate criterion for each of the indicators under consideration, and then their average harmonic value was calculated. The relationship between the mean harmonic value and the depth serves to define the boundaries between the intervals. The above algorithm was used for calculations for four wells in the Bahar field, and the results were clearly demonstrated using figures.

 

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