Oilfield reservoir souring during waterflooding: A case study with low sulphate concentration in formation and injection waters

A case study is presented, which addresses the origin of H2S in produced gas associated with the oil in Las Heras-Cerro Grande oilfield, Argentina. The possible mechanisms of reservoir souring are analyzed by sulfur isotope ratio analysis. H2S concentration vary between 9 and 453 ppm/vol. The greate...

Descripción completa

Guardado en:
Detalles Bibliográficos
Publicado: 2005
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10461779_v_n_p_Cavallaro
http://hdl.handle.net/20.500.12110/paper_10461779_v_n_p_Cavallaro
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_10461779_v_n_p_Cavallaro
record_format dspace
spelling paper:paper_10461779_v_n_p_Cavallaro2023-06-08T16:01:12Z Oilfield reservoir souring during waterflooding: A case study with low sulphate concentration in formation and injection waters A case study is presented, which addresses the origin of H2S in produced gas associated with the oil in Las Heras-Cerro Grande oilfield, Argentina. The possible mechanisms of reservoir souring are analyzed by sulfur isotope ratio analysis. H2S concentration vary between 9 and 453 ppm/vol. The greater concentration of H2S occur where the water cut is greater. The isotopic values suggest a microbial souring mechanism. The first alternative for H2S removal is to treat the produced gas with chemical agents based on triazines and to reduce the amount of sulfate reducing bacteria in the injection water. Other analyzed options were squeeze treatments in producing wells with biocides, oxidants, or sulfide scavengers. One of the most attractive options consisted in using biocompetitive exclusion processes (BCX). The BCX process has clear advantages for effective sulfide suppression as compared to previous biocide treatments. This is an abstract of a paper presented at SPE International Symposium on Oilfield Chemistry (Houston, TX 2/2-4/2005). 2005 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10461779_v_n_p_Cavallaro http://hdl.handle.net/20.500.12110/paper_10461779_v_n_p_Cavallaro
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description A case study is presented, which addresses the origin of H2S in produced gas associated with the oil in Las Heras-Cerro Grande oilfield, Argentina. The possible mechanisms of reservoir souring are analyzed by sulfur isotope ratio analysis. H2S concentration vary between 9 and 453 ppm/vol. The greater concentration of H2S occur where the water cut is greater. The isotopic values suggest a microbial souring mechanism. The first alternative for H2S removal is to treat the produced gas with chemical agents based on triazines and to reduce the amount of sulfate reducing bacteria in the injection water. Other analyzed options were squeeze treatments in producing wells with biocides, oxidants, or sulfide scavengers. One of the most attractive options consisted in using biocompetitive exclusion processes (BCX). The BCX process has clear advantages for effective sulfide suppression as compared to previous biocide treatments. This is an abstract of a paper presented at SPE International Symposium on Oilfield Chemistry (Houston, TX 2/2-4/2005).
title Oilfield reservoir souring during waterflooding: A case study with low sulphate concentration in formation and injection waters
spellingShingle Oilfield reservoir souring during waterflooding: A case study with low sulphate concentration in formation and injection waters
title_short Oilfield reservoir souring during waterflooding: A case study with low sulphate concentration in formation and injection waters
title_full Oilfield reservoir souring during waterflooding: A case study with low sulphate concentration in formation and injection waters
title_fullStr Oilfield reservoir souring during waterflooding: A case study with low sulphate concentration in formation and injection waters
title_full_unstemmed Oilfield reservoir souring during waterflooding: A case study with low sulphate concentration in formation and injection waters
title_sort oilfield reservoir souring during waterflooding: a case study with low sulphate concentration in formation and injection waters
publishDate 2005
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10461779_v_n_p_Cavallaro
http://hdl.handle.net/20.500.12110/paper_10461779_v_n_p_Cavallaro
_version_ 1768543478392815616

Ejemplares similares