RUSSIAN JOURNAL OF EARTH SCIENCES VOL. 11, RE3002, doi:10.2205/2009ES000348, 2010

The usage the expert-analytical system for geophysical monitoring underground pipelines technical state

Ukhta State Technical University, Ukhta, Russia

E. I. Krapivsky

Saint-Petersburg State Mining Institute, Saint-Petersburg, Russia

Abstract

As a result of different factors influence (ground, composing the pipeline surrounding area; underground water; microorganisms and plant roots; mechanical processes, etc), insulation of pipeline decays, steel of the pipeline are subjected to corrosion. The real period of pipelines exploitation exceeds the period of their service according to normative documents. There were more than 300 serious catastrophic failures only from 1995 to 2007 on the territory of Russia.

Many damages on pipelines with serious economic and ecological consequence are can be prevented by means of well-timed diagnostics.

Plenty theoretical and experimental researches (lab and field) of the electromagnetic fields of cathode current protection of main pipeline (P.C.C.P.E.F.) have been done at Ukhta State Technical University. These researches allowed us to work out and scientifically prove the methods of the geophysical monitoring of technical state of underground pipelines.

The forecast of probability of corrosion is carried out with the help of the expert-analytical system, which is based on the following factors: pipeline damage reasons; hypotheses about corrosion reasons; analysis of electromagnetic fields and experience.

The model contains the database, knowledge base, mathematical block of interpretation of the data and simulation modeling and more than 250 rules. It operates on 15 factors. Most of these factors can be researched by the mean of geophysical methods. The rules are made up for each method or factor, and for their complexes.

The geophysical monitoring with the usage of the expert-analytical system allows diagnosing the underground pipelines technical state promptly, with the high productivity and lower costs.

Received 28 October 2009; accepted 18 December 2009; published 9 January 2010.

Keywords: expert-analytical system, geophysical monitoring, underground pipelines, remote techniques

Citation: Demchenko N. P., Krapivsky E. I. (2010), The usage the expert-analytical system for geophysical monitoring underground pipelines technical state, Russ. J. Earth Sci., 11, RE3002, doi:10.2205/2009ES000348.