Abstract
The paper presents the chemical analysis of oilfield water and hydraulic analysis of the liquid flow in Kal'chinskoe oil field pipeline that allow detecting the causes of the internal corrosion processes. The inhibitor protection is suggested to reduce the corrosion rate in the pipelines of Kal'chinskoe oil field. Based on the analysis of the pipeline failures, it is suggested to replace steel pipes by fiberglass pipes.
Highlights
The system of oil gathering and transportation depends on the natural climatic conditions; cluster-well development; method, amount, and rate of the oil production; watercut oil; physico-chemical properties of oil, gas, water and parameters of the reservoir production [1].Kal'chinskoe oil field was found in 1990 and is today the southmost field in the Tyumen region
The field site lies within the Middle-Ob’ Plain and is represented by a dissected lacustrine-alluvial plain
The field site is represented by loams, clayey and sandy soils of different size
Summary
The system of oil gathering and transportation depends on the natural climatic conditions (continental climate, bogginess); cluster-well development; method, amount, and rate of the oil production; watercut oil; physico-chemical properties of oil, gas, water and parameters of the reservoir production [1]. Oilfield waters of Kal'chinskoe oil field are represented by complex solutions comprising inorganic salts, gases, soluble organic substances. 2. Hydraulic analysis of the liquid flow in Kal'chinskoe oil field pipeline Table 1 presents the original data on the physical properties of fluids pumped through the pipeline and its hydrodynamic parameters. Hydraulic analysis of the liquid flow in Kal'chinskoe oil field pipeline Table 1 presents the original data on the physical properties of fluids pumped through the pipeline and its hydrodynamic parameters Using these data, the fluid flow rate and the critical rate of transition from stratified to non-stratified oil–water flows were obtained for the pipeline section in Kal'chinskoe oil field. The condition of corrosion resistance is satisfied in case the flow rate is higher than the critical rate If this condition is not satisfied, intense localized corrosion frequently occurs on the metallic surface of the pipeline [2]. The calculations are carried out in compliance with the methodology given in The Design and Operation Manual for Corrosion-Resistant Protection of Pipelines in West Siberian Oil Fields (Regulatory Document 390147323-339-89-R) with a view to determine the modes of fluid control and the maximum rate of corrosion
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