Hydrogen Sulfide Genesis in BZ 25-1/S Oilfields,Bozhong Depression

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  • 1.CNOOC Tianjin Company,Tianjin 300452, China;
    2.CNOOC Energy Technology and Services-Oilfield Technology Services Co., Tianjin 300452, China

Received date: 2012-03-05

  Revised date: 2012-03-26

  Online published: 2012-06-10

Abstract

Hydrogen sulfide as a harmful gas ingredient in gas and oil associated gas brings the potential safe question of oil and gas production.During the oil field  development of BZ 25-1/S oilfield in the Bozhong Depression,Bohai Bay basin,H2S has been detected in the some wells,distributing in rang of (5-318) × 10-6.In this paper,we collected the samples of natural gas,sulfate and ferrous sulfide and measured theH2S content,carbon isotopic compositions of alkene gases and sulfur stable isotopes of H2S and solid sulfur-bearing matters in the low part of Minghuazhen Formation and Shahejie Formation of BZ 25-1/S oilfield.The results show that the hydrogen sulfide as well as oil and gas in the BZ 25-1/S oilfield is sourced from the Shahejie Formation source rock,and the  hydrogen sulfide is thermally decomposed from the source rock rather than TSR or BSR.

Cite this article

TIAN Nan, NIU Hong-Bin, MA Tuan-Jiao, LI Yang-Bing . Hydrogen Sulfide Genesis in BZ 25-1/S Oilfields,Bozhong Depression[J]. Natural Gas Geoscience, 2012 , 23(3) : 438 -442 . DOI: 10.11764/j.issn.1672-1926.2012.03.438

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