«Oilfield engineering»

EVALUATION OF THE EFFECTIVENESS OF THE FORMATION BOTTOM-HOLE ZONE TREATMENT DURING LABORATORY SIMULATION OF RADIAL FILTRATION

UDC: 622.276.63
DOI: 10.33285/0207-2351-2022-1(637)-20-23

Authors:

¹ Rosneft-NTC, Krasnodar, Russia

Keywords: well, modeling, core samples (core material), filtration, near-well formation zone, acid composition, core holder, laboratory studies

Annotation:

Currently, most of the fields, the main oil-producing regions of the Russian Federation, use various technologies for processing the bottom-hole zone to improve the operation of wells. In fact, many technologies used in the industry do not meet all the economic and technical requirement. The efficiency of oil field development is largely determined by the state of the near-well formation zone (NWFZ) and the methods of its assessment. During the development of productive formations, the NWFZ is most susceptible to various physical-chemical and thermodynamic influences. Due to this fact, there appears a problem of assessing the reliability of filtration flows and the effectiveness of using various methods of influencing the NWFZ. In conditions of deposits development rapidity, there is a need for modeling processes close to reservoir conditions. Acid treatment is an effective method of cleaning the borehole and the bottom-hole zone in order to increase the productivity of wells. The complex acidic treatment results in dissolution of colmatation materials, deposits and sediments, followed by the removal of reaction products from the well and the near-well formation zone. The intensification of well operation by acid treatment is still relevant at the present time. In this regard, there is a need to involve oil-saturated intervals of reservoirs with degraded filtration and capacitance properties in the development, the operation of which is complicated by low permeability, heterogeneity of reservoir properties and a sharp increase in the water content of products. To solve these problems within the framework of laboratory studies, the experimental modeling of the radial filtration process was carried out so that to use complex acid compositions in order to ensure effective processing of NWFZ and to increase the flow rate of wells.

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