EVALUATION OF EFFICIENCY AND CONTROL OVER CARBONATE SEAM ACID PROCESSING Russian patent published in 2014 - IPC E21B43/27 

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method comprises recovery of core, making of core specimens and their analysis at electronic scanning microscope. Chemical reagent is forced through prepared specimens and sections are made at entry and exit of said chemical reagent. X-ray tomography is used to analyse the core specimens after forcing though of said chemical reagent. Images are compared to isolate the most efficient forms of solution channels. Numerical value of acid processing efficiency is calculated by computer processing of characteristics of images produced with the help of tomographic scanner. Minimum numerical value of said efficiency is selected as a criterion of the highest efficiency of acid processing. Note here that magnitude of stimulation is used as the numerical value of acid processing efficiency. Note here that, first, software is used for automatic determination of bored hole propagation volume. Then, acid solution penetration depth is computed. Now, stimulation magnitude is calculated by mathematical formula.

EFFECT: higher accuracy of efficiency and control over acid processing, fast determination.

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