Abstract
Background The result of employment of any technology aimed in oil and gas production depends on many factors such as geological, geophysical, physical, chemical and, finally, technological factors. The most complex is a technology hydraulic fracturing treatment. After the fracturing thousands of parameters and dozen of diagrams are found out, that could be divided into several grops: process control parameters, summary data, finance indicator, analysis results of mini-fracturing, analysis results of base fracturing. All parameters overtly or covertly use for estimation of efficiency of oil well after the hydraulic fracturing treatment. The past decade is characterized by the increase in use of the hydraulic fracturing. Hydraulic fracturing is carried out in almost all fields. To solve the problems of fracturing forecasting and achievement of sufficiently high technical and economic performance the objective assessment of its effectiveness is required. For objective estimation of the efficiency of fracturing there were analyzed 700 fracturing results of 446 wells of West Siberia’s oil fields. Main exploration objects for fracturing were: АС 9, АС 10, АС 11 and АС 12. The high amount of fracturing results could be analyzed only using the method of mathematical statistics. Statistic analysis was carried out in three stages: 1. Estimation of oil well efficiency after the fracturing; 2. Ranking of fracturing fluids referring to the amount of effective wells; 3. Definition of hydraulic fracturing technological parameters according to their ranking. Aims and Objectives To make an assessment of hydraulic fracturing effectiveness by the well technological parameters after the procedure. Methods Solution of the problem is made using probabilistic and statistical methods of technological data processing. Results 1. There is defined the number of wells, effectively working after hydraulic fracturing by geotechnological and statistic analyzes results 2. The main factor influencing at partial contribution in high-effective hydraulic fracturing group are well operations, made in АС 11 layer, while the hydraulic fracturing, made in АС 9 bed are the main factor influencing at partial contribution in low-effective wells after hydraulic fracture group. 3. There are defined the geological-technological conditions of the layer where the low, medium and high effectiveness is possible.
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