«Onshore and offshore oil and gas well construction»

Increase of low flow-rate wells productivity to increase productive formations coverage at an oil field with low-permeable reservoirs

UDC: 622.276.66
DOI: -

Authors:

¹ Kuban State Technological University, Krasnodar, Russia

Keywords: criteria of selecting a well when conducting a hydraulic fracturing, selection of a candidate well for conducting hydraulic fracturing, comparison of hydraulic fracturing applicability criteria with well indicators, analysis of hydraulic fracturing application efficiency, dynamics of average flow-rates and water-flooding before and after hydraulic fracturing, calculation of hydraulic fracturing parameters using a single well as an example, assessment of hydraulic fracturing technological efficiency

Annotation:

The authors of the article briefly describe the oil field under consideration, administratively located in the western part of the Kargasok district of the Tomsk region. The main methods of increasing oil recovery are described and the most common method at the field - hydraulic fracturing - is analyzed. This method is suitable for the conditions of the field due to the special geological characteristics in the area. Carrying out hydraulic fracturing operations at the field made it possible to significantly increase low flow-rate wells productivity. The optimal technology application provides 1-2 years hydraulic fracturing effect duration, the success rate of operations reaches 70–80 %. There exist a lot of modifications of hydraulic fracturing technology, differing by volumes, concentrations and rates of process fluids and proppant injection. The choice of modification depends on the geological-physical characteristics of the formation and the set goal. To intensify oil production at a field, hydraulic fracturing can be provided in production wells in pure oil zones of formations. First of all, it is necessary to consider the possibility of using "mini-hydraulic fracturing" with the development of cracks up to 10–20 m.

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