Corrosion and Environmental Cracking Evaluation of High Density Brines for Use in HPHT Fields

Abstract

Corrosion and Environmental Cracking Evaluation of High Density Brines for Use in HPHT Fields Eugenio Lo Piccolo; Eugenio Lo Piccolo Centro Sviluppo Materiali Search for other works by this author on: This Site Google Scholar Lucrezia Scoppio; Lucrezia Scoppio Centro Sviluppo Materiali Search for other works by this author on: This Site Google Scholar Perry Ian Nice Perry Ian Nice Stale Nodland Statoil ASA Search for other works by this author on: This Site Google Scholar Paper presented at the SPE High Pressure/High Temperature Sour Well Design Applied Technology Workshop, The Woodlands, Texas, May 2005. Paper Number: SPE-97593-MS https://doi.org/10.2118/97593-MS Published: May 17 2005 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Piccolo, Eugenio Lo, Scoppio, Lucrezia, and Perry Ian Nice. "Corrosion and Environmental Cracking Evaluation of High Density Brines for Use in HPHT Fields." Paper presented at the SPE High Pressure/High Temperature Sour Well Design Applied Technology Workshop, The Woodlands, Texas, May 2005. doi: https://doi.org/10.2118/97593-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE High Pressure/High Temperature Sour Well Design Applied Technology Workshop Search Advanced Search Abstract In high pressure high temperature (HPHT) gas condensate wells the use of high density brines is required to ensure safe well operations during both well drilling and completion phases.This investigation studied the corrosion and environmental cracking behaviour of several high density brines in simulated HPHT conditions.The tested materials were low alloy steel grades P-110 and C-110, supermartensitic stainless steel (S13Cr) grade 110 ksi, duplex stainless steel, galvanized carbon steel wireline, duplex stainless steel wireline, superaustenitic stainless steel (N08535) and alloy 718. These materials were tested as single corrosion coupons, c-rings and four point bent beam specimens.A test program was embarked, selecting experimental conditions representative of future HPHT Field developments in the Norwegian Continental Shelf.The test results showed that S13Cr and duplex stainless steel suffered SCC failure in CaCl2 and CaCl2+CaBr2 brines at HPHT.The effect of corrosion inhibitor with these brines was variable, but acceptable to low alloy steels.It was also found that alloy 718 suffered a significant loss in ductility due to hydrogen embrittlement when exposed to caesium formate. But this did not result in cracking failures under the static loaded test conditions.S13Cr suffered both general and superficial pitting corrosion with evidence of initiation of SCC associated with the pits when exposed to caesium formate. Keywords: tensile specimen, materials and corrosion, riser corrosion, co 2, corrosion inhibitor, well integrity, bar co 2, pipeline corrosion, exposure, cabr 2 Subjects: Pipelines, Flowlines and Risers, Materials and corrosion, Well Integrity, Subsurface corrosion (tubing, casing, completion equipment, conductor) Copyright 2005, Society of Petroleum Engineers You can access this article if you purchase or spend a download.