Sistema de aquisição de dados para estudos de transiente de pressão e detecção de vazamentos em oleodutos

摘要

In February 2011, the National Agency of Petroleum, Natural Gas and Biofuels(ANP) has published a new Technical Rules for Handling Land Pipeline Petroleum andNatural Gas Derivatives (RTDT). Among other things, the RTDT made compulsory theuse of monitoring systems and leak detection in all onshore pipelines in the country.This document provides a study on the method for detection of transient pressure.The study was conducted on a industrial duct 16" diameter and 9.8 km long. The pipelineis fully pressurized and carries a multiphase mixture of crude oil, water and natural gas.For the study, was built an infrastructure for data acquisition and validation of detectionalgorithms. The system was designed with SCADA architecture. Piezoresistive sensorswere installed at the ends of the duct and Digital Signal Processors (DSPs) were usedfor sampling, storage and processing of data. The study was based on simulations ofleaks through valves and search for patterns that characterize the occurrence of suchphenomena