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Method for evaluating corrosion sensitive parameters of high-sulfur-content gathering and transportation pipeline

A corrosion-sensitive, evaluation method technology, applied in chemical data mining, electrical digital data processing, special data processing applications, etc., can solve the problems of many invalid rules, time-consuming, inapplicability, etc., achieving high practicability and strong popularization. , cost saving effect

Inactive Publication Date: 2022-01-11
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional Apriori association rule algorithm is time-consuming and has many invalid rules, so it is not suitable for association rule analysis of corrosion factors in high-sulfur associated gas pipelines

Method used

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  • Method for evaluating corrosion sensitive parameters of high-sulfur-content gathering and transportation pipeline
  • Method for evaluating corrosion sensitive parameters of high-sulfur-content gathering and transportation pipeline
  • Method for evaluating corrosion sensitive parameters of high-sulfur-content gathering and transportation pipeline

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Experimental program
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Effect test

Embodiment 1

[0054] Step 1: Collect the design data, medium composition and basic parameters of operation data of the high-sulfur gathering and transportation pipeline. The design data includes pipe material, pipe length, pipe diameter, and wall thickness; the medium composition includes carbon dioxide content, hydrogen sulfide content, nitrogen content, methane content, ethane content, propane content; operating data include mass flow, inlet and outlet pressure, inlet and outlet temperature, the high-sulfur gathering and transportation pipeline was put into operation in June 2011, the material is L245N seamless steel pipe, the total length is 8km, the pipe The diameter is 168mm, the wall thickness is 6mm, the component data is carbon dioxide content 11mol%, hydrogen sulfide content 67421ppm, nitrogen content 15mol%, methane content 56 mol%, ethane content 11mol%, propane content 5 mol%, other content 2mol% . The mass flow rate of the pipeline is 0.1774kg / s, the inlet pressure is 1MPa, the...

Embodiment 2

[0081] Step 1: Collect the design data, medium composition and basic parameters of operation data of the high-sulfur gathering and transportation pipeline. The design data includes pipe material, pipe length, pipe diameter, and wall thickness; the medium composition includes carbon dioxide content, hydrogen sulfide content, nitrogen content, methane content, ethane content, propane content; operating data include mass flow, inlet and outlet pressure, inlet and outlet temperature, the high-sulfur gathering and transportation pipeline was put into operation in June 2011, the material is L245N seamless steel pipe, the total length is 4km, the pipe The diameter is 114mm, the wall thickness is 4mm, the component data is carbon dioxide content 10mol%, hydrogen sulfide content 105405ppm, nitrogen content 8 mol%, methane content 52mol%, ethane content 14 mol%, propane content 8mol%, other content 8 mol %. The mass flow rate of the pipeline is 0.25 kg / s, the inlet pressure is 0.6MPa, t...

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Abstract

The invention discloses a method for evaluating corrosion sensitive parameters of a high-sulfur-content gathering and transportation pipeline, and belongs to the field of corrosion evaluation and analysis of high-sulfur-content gathering and transportation pipelines. The method is characterized by comprising the following steps of: collecting basic parameters of design data, medium components and operation data of a high-sulfur-content gathering and transportation pipeline, and adopting a mass equation, a momentum balance equation and an energy balance equation to solve the along-line distribution rule of all the parameters in the high-sulfur-content gathering and transportation pipeline; and analyzing sensitive parameters of liquid flow rate, gas flow rate, liquid holdup, temperature, hydrogen sulfide partial pressure, carbon dioxide partial pressure and pressure to corrosion rate by using multi-factor variance, screening out corrosion main control factors, establishing an association rule between the corrosion rate and the sensitive parameters by using an FP tree frequency set algorithm, drawing a corrosion sensitive parameter chart of the high-sulfur gathering and transportation pipeline, and substituting the values of the main control factors into the chart, and judging the corrosion grade of the high-sulfur-content gathering and transportation pipeline. According to the method, the chart establishing process is simplified, the cost is saved, time and labor are saved, the generalization performance is high, and the practicability is high.

Description

technical field [0001] The invention relates to the field of corrosion evaluation and analysis of high-sulfur gathering and transportation pipelines, in particular to a method for evaluating corrosion-sensitive parameters of high-sulfur-containing gathering and transportation pipelines. Background technique [0002] High-sulfur gathering and transportation pipelines have the characteristics of "five highs and one low" of "high hydrogen sulfide, high carbon dioxide, high water, high chloride ions, high salinity, and low pH", and the internal corrosion environment is very harsh. Since the associated gas exported is untreated moisture, as the temperature and pressure of the transportation operation decrease and change, it will condense and form hydrops in the low-lying and climbing sections of the pipeline, and hydrogen sulfide and carbon dioxide will dissolve in the fluid in the pipeline to form hydrogen sulfide In the electrochemical corrosion environment under the coexistenc...

Claims

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Application Information

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IPC IPC(8): G06F30/18G06F30/28G16C20/10G16C20/70G06F113/08G06F113/14G06F119/14
CPCG06F30/18G06F30/28G16C20/10G16C20/70G06F2113/08G06F2113/14G06F2119/14
Inventor 赵帅廖柯熹何国玺杨娜陈迪覃敏叶男
Owner SOUTHWEST PETROLEUM UNIV
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