The purpose of this paper is to show how a pipeline company can integrate its operational and commercial practices into a real-time environment that will allow safe, efficient, and profitable operations. Operational pipeline modeling & management, SCADA, and commercial transaction systems can be combined to provide hydraulic validations of business transactions and, resultantly, provide a real-time and forward look at pipeline expectations. This helps pipeline companies better manage oil and gas shipments on a real-time basis and to comply with issues of restructuring and regulations to avoid unnecessary costs and build revenue. Transpetro in Brazil has automated and integrated many of its processes. This paper will define the issues encountered by Transpetro and the steps it took to integrate both its operational and commercial business systems into a real-time environment. The paper will also document the integration of systems to merge the commercial business transactions and operational parameters to provide forward looking models necessary to utilize the entire pipeline system effectively. The solutions developed by Transpetro could be applied to many other pipeline companies.
Transpetro is a full subsidiary of Petroleo Brasileiro S.A. - Petrobras and was incorporated on June 12, 1998. Its mission is bulk transport and storage of petroleum and its byproducts and of natural gas through pipelines and ships, and to operate terminals. There are two big networks (Northeast and Southeast), each one with a number of pipelines: The Northeast Network runs along seven states in Brazil (Bahia, Sergipe, Alagoas, Pernambuco, ParaÍba, Rio Grande do Norte e Ceará) and moves approximately 9 Million m3/day. The entire network includes three (3) compressor stations. This network is composed mainly of five pipelines: GASFOR, NORDESTÃO, GASALP, GASEB, and a Sub-Network. The Southeast Network runs along three states (Rio de Janeiro, São Paulo e Minas Gerais) and moves 20 Million m3/day. The entire network includes five (5) compressor stations and it has the following pipelines: GASBEL, GASVOL, GASPAL, GASAN, Merluza, GASDUC I, GASDUC II, and G1, G2, G4, Namoradao, Enchovao (G3), GASCAB I (G5) and GASCAB II. The last seven are essentially gas gathering lines that bring gas from offshore. Among other business TRANSPETRO sells gas transportation capacity to a number of companies interested in moving gas from the producing site to the consumption points. TRANSPETRO's client companies are called "shippers" who request on a daily and monthly basis certain amount of gas to be transported by TRANSPETRO from a supply point to a given delivery point. TRANSPETRO also provides operational, maintenance, and administration services to other transporters. TRANSPETRO strive to maximize the amount of transported volume while maintaining the operating limits of the pipeline.
The Transpetro system consists of a pipeline hydraulic simulator with both real-time and predictive models, and a nominations system. Operations use the real-time model to monitor the state of the pipeline networks for purposes of operational analysis, linepack/pressure management, etc.