Abstract
Scale formation of water injection pipeline will cause the pipeline to be corroded and increase frictional drag, which will induce the quality and quantity cannot meet the need of oil production process. The cause of scale formation in different oilfield is different because of the complex formation conditions. Taking one operation area of Tazhong oilfield as research object, the authors studied the water quality in different point along water injection pipeline through experiment studies, and analyzed the cause of inorganic scale formation and influence factors. The research results can provide theoretical guidance to anticorrosion and antiscale of oilfield pipeline.
Highlights
Oilfield produced water mainly refers to prolapsed sewage in the crude oil production process
(3) The scaling that evaporation caused and produced hydrocarbon gas in the process of mining relates to formation water
The test results of calcium ions are higher than the test results of water quality in 2009
Summary
Oilfield produced water mainly refers to prolapsed sewage in the crude oil production process. Poor quality injected water will lead to scale formation and corrosion in the water injection pipeline, which can induce the oil production [1,2,3]. (2) Automatic scaling reservoir water and oil coexisted; various production processes inevitably lead to the changes of equilibrium. If this change makes fluid components over a mineral solubility limit, it will produce the scale deposition sulfate and carbonate, due to changing the temperature and pressure or the deposition of hampered flow; high salinity brine temperature substantially falls; they will lead to halide precipitation crystallization. (3) The scaling that evaporation caused and produced hydrocarbon gas in the process of mining relates to formation water. The trend of the water injection system scaling and corrosion is predicted, which benefits to prevent these negative factors reducing the oil recovery
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