Usage of different well productivity index determination methods for efficiency evaluation of future geological and engineering operations on Vostochno-Messoyakhskoe formation

In this paper methods for predicting efficiency of different geological and engineering operations on wells are presented.

The purpose of the work was to determine the optimal ways for evaluation of planned flow rates after geological and engineering operations and comparative analysis economic efficiency of such operations.

Materials and methods. Key parameter for such evaluation is productivity index, its prediction method depends on the type of geological and engineering operations. This work describes two methods of productivity index determination: numerical and theoretical. Theoretical methods determine theoretically possible productivity by formulas which are reflecting physic processes in formation. Numerical methods are used to analyze actual well performance, what allows to determine potential productivity. There were three time series analysis methods examined as numerical methods and the one, that allows more accurately determine potential productivity index according to actual data, was chosen.

Result of this work is a possibility to calculate planned effects of geological and engineering operations such as perforation work, bottom-hole treatment, hydraulic fracturing, and determine which one is the most economically practical for wells.

Conclusion. Methods and automated instruments, which are using these methods as foundation, are successfully used to determine wells for well intervention processes and planning geological and engineering operations for East-Messoyakha formation.

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