RESEARCH AND ANALYSIS OF METHODS FOR DETERMINING THE EFFICIENCY OF APPLICATION OF THE PROPPANT HYDRAULIC FRACTURING
Relevance. A great number of hydraulic fracturing treatments are performed on LUKOIL-PERM LLC fields. A lot of fields are in the final stages of development. In conditions of a high degree of recovery of reserves, high water cut and decrease in reservoir pressure it is necessary to justify target well performance indicators on the new level. The aim of the research is to forecast the magnitude of the increase in oil production rate using the probabilistic-statistical approach and the method for computation by specific productivity index, compare the results obtained with the real data. Objects: the effectiveness of the proppant hydraulic fracturing at the carbonate V3V4 reservoir of the Batyrbayskoe field. Research methods: probability theory and mathematical statistics. Results. Use of the probabilistic and statistical analysis allowed constructing multidimensional mathematical models for assessment of hydraulic fracturing efficiency. These models predicted the efficiency of hydraulic fracturing. The main advantage of a probabilistic and statistical method is: all parameters used for the forecast with various dimensions are transferred to dimensionless sizes that simplifies comparative analysis. Comparison of the received efficiency of hydraulic fracturing with a standard method of calculation of liquid output through specific coefficient of efficiency is executed. The carried out analysis showed that the developed probabilistic and statistical method of the forecast provides more exact convergence with actual data, unlike the results received by the method of efficiency specific coefficient. The obtained values of coefficients of pair correlation for the probabilistic and statistical method is 0,85, while the ones obtained by the specific efficiency method is 0,15. At the statistical level higher efficiency of the probabilistic and statistical method is confirmed.