Ternary oil displacing well pickling solution residue treatment device and method

Abstract

The invention relates to the technical field of oil field production and belongs to a ternary oil displacing well pickling solution residue treatment device and method. The ternary oil displacing wellpickling solution residue treatment device and method mainly solves the problems of traditional pickling solution such as environment pollution, high treatment difficulty and cost, corrosion to production equipment and influence on working of electric dehydrators. According to the ternary oil displacing well pickling solution residue treatment device and method, solution residue treating fluid isfilled inside a tubing-casing annulus through a pickling solution residue circulating treatment device for circulated solution residue treatment to achieve no discharge of pickling solution residues.The ternary oil displacing well pickling solution residue treatment device and method has the functional advantages of treatment speed adjustability, real-time pH and electric conductivity detection,combustible gas concentration monitoring, overpressure protection, circuit protection and the like.

Description

technical field [0001] The invention relates to the field of oil field chemistry, in particular to a treatment device and treatment method suitable for pickling residual liquid in three-element compound oil flooding wells. Background technique [0002] The ASP flooding technology has been applied on a large scale in Daqing Oilfield, and has achieved an effect of more than 20 percentage points higher recovery than water flooding, accumulatively increasing oil production by 24.56 million tons and creating an output value of 75.8 billion yuan. With the popularization and application of flooding technology, the problem of fouling in production wells has become increasingly prominent. In order to solve the problem of fouling, the ASP flooding well pickling technology has been developed, but this technology still has shortcomings in the treatment of raffinate and needs to be improved urgently. [0003] Firstly, the pickling residue has a low pH value and has strong activity, which...

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Problems solved by technology

[0002] The ASP flooding technology has been applied on a large scale in Daqing Oilfield, and has achieved an effect of more than 20 percentage points higher recovery than water flooding, accumulatively increasing oil production by 24.56 million tons and creating an output value of 75.8 billion yuan. With the popularization and application of flooding technology, the scaling problem of production wells has become increasingly prominent. In order to solve the scaling problem, the ASP flooding well pickling technology has been developed, but this technology still has shortcomings in the treatment of raffinate, which needs to be improved urgently

[0003] Firstly, the pickling residue has a low pH value and has strong activity, which will corrode the lifting equipment; secondly, the pickling residue has a high conductivity. When it enters the surface oil-water separation system, it will cause a surge in current, and the dehydrator Work failure not only delays production, but also causes high maintenance costs; finally, if the pickling residue is discharged outside, it will cause serious environmental pollution

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