The Influence of Tectonic Faults on the Wells Productivity in the Fault-Block Structure Field of the Komi Republic

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Abstract

The influence of disjunctive tectonics on field development is of an exploratory nature and requires further study. Development design that involves drilling production wells at poorly studied sites without a reliable geological model involving faults is a high-risk undertaking. Many researchers of fault-block structure sites have encountered the problem of significant unevenness in productivity distribution, well operation patterns, and waterlogging dynamics across the field area. After establishing the presence of a tectonic factor, attention was focused on the dependence of the distance of wells to faults on productivity and other operating factors. In general, the dependence was designated as follows: increased well productivity was noted in fault zones; for some sites, the size of the increased productivity zone was determined quantitatively and was up to 2 km. A study of the influence of tectonic faults on well productivity for one of the fields in the Timan-Pechora Basin (TPB) has been conducted. For the Silurian deposits of the TPB, a relationship was established between well productivity and a tectonic disturbance, which was a normal fault. Increased well productivity was detected at a distance of 2 km from the fault. For the first time, a dependence was found for the influence of the distance from a normal fault to production wells on the efficiency of their operation for oil deposits of the Silurian deposits, which made it possible to predict the volume of production. Based on the results of optimization of drilling of project wells based on a new understanding of the geological structure of the field and the identification of a zone of increased productivity, the cumulative production of the project cluster increased by 1.5 times as a whole for the cluster over a 15-year forecast period. The total initial planned oil flow rate increased by 1.8 times.

Keywords

Timan-Pechora BasinKomi Republictectonic faultsfault tectonicsdisjunctivesfaultsblocksblock structurefault-block structurezones of increased productivitywell productivitySilurian depositsfield developmentdevelopment systemsfracturing

Bibliography

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Article information

Published
30 August 2024
Issue date
30 August 2024
Issue
Vol. 24, No. 3 (2024)
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