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YANG JiaJing, WANG YiGang, WANG LanSheng, WEN YingChu, LIU HuaYi, Zhou GuoYuan. The Origin of Natural Gases and Geochemistry Characters ofChangxing Reef and Feixianguan Oolitic Beach Gas Reservoirs in Eastern Sichuan Basin[J]. Acta Sedimentologica Sinica, 2002, 20(2): 349-353.
Citation: YANG JiaJing, WANG YiGang, WANG LanSheng, WEN YingChu, LIU HuaYi, Zhou GuoYuan. The Origin of Natural Gases and Geochemistry Characters ofChangxing Reef and Feixianguan Oolitic Beach Gas Reservoirs in Eastern Sichuan Basin[J]. Acta Sedimentologica Sinica, 2002, 20(2): 349-353.

The Origin of Natural Gases and Geochemistry Characters ofChangxing Reef and Feixianguan Oolitic Beach Gas Reservoirs in Eastern Sichuan Basin

  • Received Date: 2001-03-19
  • Rev Recd Date: 2001-09-14
  • Publish Date: 2002-04-10
  • Changxing Reef of Upper Permian and Feixianguan oolitic beach of Lower Triassic are the focus point of exploration work in Sichuan Basin during the ninth-five-year-plan. Through the study on organic geochemistry of source rocks of Upper Permian and Lower Triassic, reservoir bitumen and natural gases of Changxin Fm. reef and Feixianguan Fm. oolitic beach gas reservoirs, the shoreside coal measures mudstone and the sea trough carbonate of Upper Permian Series have been defined as the main source rocks,which are high maturate and controlled by the different sedimentary facies, and the reservoir bitumen and natural gases of Changxing Fm. reef and Feixianguan Fm. oolitic beach gas reservoirs are originated from the source rock of Upper Permian Series, the natural gas is a dry gas being thermally degraded from oil, the solid bitumen is a residue of oil retained in reservoir rocks, and the migration of natural gases is mainly vertical. The volume of H 2S is high in some exploratory wells of Feixianguan Fm. oolitic beach gas reservoirs, such as Gaofengchang, Longmen, Tieshanpo, Dukouhe, Luojiazhai structure, etc. H 2S is associated with the distribution of anhydrite in Feixianguan Fm. oolitic beach reservoir and related with the thermochemical sulfate reduction (TSR).And all above are closely related with the sedimentary facies.
  • [1] 1. 文应初.四川地区早三叠世飞仙关期碳酸盐岩台地增生与有利储集相带展布[J].天然气工业,1998,8:18~24[Wen Yingchu,et al.Extension of Carbonate Platform in Feixianguan Age of Early Triassic and the Distribution of Favorable Reservoir Facies Belts in Sichuan[J].Natrural Gas Industry,1998,18(2):18~24]

    2. Orr W L.Changes in sulfur content and isotopic ratios of sulfur during petroleum maturation-Study of Big Horn Basin Paleozoic oils[J].AAPG,1974.58

    3. Hunt J M.Petroleum geochemistry and geology[M].1996,second edition

    4. Machel G H,et al,Products and distinguishing criteria of bacterial and thermo-chemical sulfate reduction[J].Applied Geochemistry,1995,10:373~389
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  • Received:  2001-03-19
  • Revised:  2001-09-14
  • Published:  2002-04-10

The Origin of Natural Gases and Geochemistry Characters ofChangxing Reef and Feixianguan Oolitic Beach Gas Reservoirs in Eastern Sichuan Basin

Abstract: Changxing Reef of Upper Permian and Feixianguan oolitic beach of Lower Triassic are the focus point of exploration work in Sichuan Basin during the ninth-five-year-plan. Through the study on organic geochemistry of source rocks of Upper Permian and Lower Triassic, reservoir bitumen and natural gases of Changxin Fm. reef and Feixianguan Fm. oolitic beach gas reservoirs, the shoreside coal measures mudstone and the sea trough carbonate of Upper Permian Series have been defined as the main source rocks,which are high maturate and controlled by the different sedimentary facies, and the reservoir bitumen and natural gases of Changxing Fm. reef and Feixianguan Fm. oolitic beach gas reservoirs are originated from the source rock of Upper Permian Series, the natural gas is a dry gas being thermally degraded from oil, the solid bitumen is a residue of oil retained in reservoir rocks, and the migration of natural gases is mainly vertical. The volume of H 2S is high in some exploratory wells of Feixianguan Fm. oolitic beach gas reservoirs, such as Gaofengchang, Longmen, Tieshanpo, Dukouhe, Luojiazhai structure, etc. H 2S is associated with the distribution of anhydrite in Feixianguan Fm. oolitic beach reservoir and related with the thermochemical sulfate reduction (TSR).And all above are closely related with the sedimentary facies.

YANG JiaJing, WANG YiGang, WANG LanSheng, WEN YingChu, LIU HuaYi, Zhou GuoYuan. The Origin of Natural Gases and Geochemistry Characters ofChangxing Reef and Feixianguan Oolitic Beach Gas Reservoirs in Eastern Sichuan Basin[J]. Acta Sedimentologica Sinica, 2002, 20(2): 349-353.
Citation: YANG JiaJing, WANG YiGang, WANG LanSheng, WEN YingChu, LIU HuaYi, Zhou GuoYuan. The Origin of Natural Gases and Geochemistry Characters ofChangxing Reef and Feixianguan Oolitic Beach Gas Reservoirs in Eastern Sichuan Basin[J]. Acta Sedimentologica Sinica, 2002, 20(2): 349-353.
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