Abstract
A number of difficulties may be encountered in the final stages of oil field exploitation, including the formation of asphalt–resin–paraffin deposits (ARPDs). It is expedient to use complex technologies to remove the already formed deposits and prevent the formation of ARPDs. This paper focuses on the complex technology of oil field exploitation. This technology combines both the removal of organic deposits and the prevention of the formation of these deposits in the well bottomhole formation zone (BHFZ) system. The calculations for determining the process parameters of selling the ARPD inhibitor solution into the BHFZ are presented in this article. This complex technology includes the process of ARPD removal by flushing the well and the subsequent injection of the developed ARPD solvent into the BHFZ. In addition, the technology is complemented by a method of preventing the formation of these deposits. This method consists of squeezing the ARPD inhibitor and then pumping it by the selling fluid from five to ten times of the volume. This article contains a detailed calculation of the methodology and provides the diagrams for the solvent and inhibitor injection.
Highlights
The oil field exploitation process can be roughly divided into four stages
It can be achieved by flushing the well and pumping the developed solvent into the bottomhole formation zone (BHFZ), and by injecting the asphalt–resin–paraffin deposits (ARPDs) inhibitor into the BHFZ to prevent the formation of these deposits in the well BHFZ system
The downhole equipment was preliminarily cleaned of deposits, after which the ARPD inhibitor was injected into the BHFZ and displaced with oil; like the previous experience of injecting the ARPD inhibitor in the BHFZ, the technology provides for the removal and prevention of the formation of deposits only in the downhole equipment [50,105]
Summary
Stage 4 is referred to as the final stage of oil field development It is characterized by a relatively slow, gradual decline of oil production and a high water cut of well production. The aim of this work is to develop a complex technology of exploitation This technology includes the removal of organic deposits formed in the well bottomhole formation zone (BHFZ) system. It can be achieved by flushing the well and pumping the developed solvent into the BHFZ, and by injecting the ARPD inhibitor into the BHFZ to prevent the formation of these deposits in the well BHFZ system. (1) the removal of the already formed deposits; (2) the prevention of the formation of deposits
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