RESULTS OF INDUSTRIAL IMPLEMENTATION AND PROSPECTS OF APPLICATION OF ADVANCED ACID TREATMENT TECHNOLOGY

Abstract

Relevance. Аcid treatments are one of the most common methods of increasing the productivity of production wells that exploit carbonate deposits. The technology of an unsuitable method of acid treatment is presented as a promising alternative to standard treatments of the bottomhole formation zone. Traditional operation is carried out with the organization of a major overhaul team and takes about 15 days. With the development of unsuitable technologies and introduction of new acid compositions, the processing time is reduced to five days, which seems to be more economically feasible for a subsoil user enterprise. The industrial experience of using this type of acid treatment at the deposits of the Perm region is more than four years. However, in several cases, it cannot be argued that there is the effect from the unsuitable bottomhole formation zone, but rather the optimization of the operation of downhole pumping equipment. A detailed analysis of the results of industrial application and assessment of further prospects for the application of the technology of unsuitable acid treatments are required. The main aim of the study is the analysis of the effectiveness of acid treatments without setting up a workover crew at carbonate oil fields for effective selection of candidate wells. Object: terrigenous and carbonate collectors of Perm region. The methods: geological field analysis, factor analysis, methods of linear discriminant analysis. The results. Based on the analysis of field data using various statistical methods, the effectiveness of unsuitable technologies was confirmed and the duration of the effect after the implementation of the measure was estimated, the most promising and least expedient objects were identified for continuing the processing. Using the methods of linear discriminant analysis, groups of effective and ineffective well operations are uniquely identified. Criteria for improving the quality of selection of candidate wells for subsequent geological and technical measures were updated. For the entire sample, a statistical model was formed to predict the increase in oil production after unsuitable treatment of the bottomhole zone, depending on the set of defining geological and technological parameters. The model showed a high convergence with the actual data. Based on the results obtained, the author made the assessment of the increase in the oil production rate by the investigated composition in candidate wells: high probability of an effective measure was established.

Keywords

• acid exposure
• treatment without workover crew
• acid composition
• performance evaluation
• carbonate reservoir
• factor analysis
• discriminant analysis