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Article Navigation >  Acta Sedimentologica Sinica  > 2002  >  20(1): 61-69

SUN Yan, SHEN An-jiang, XU Yang, LIN Nian-tian. A Research on E3 2 Algal-Reef Reservoir in Yuejin Area, Qaidam Basin, Northwestern China[J]. Acta Sedimentologica Sinica, 2002, 20(1): 61-69.
Citation: SUN Yan, SHEN An-jiang, XU Yang, LIN Nian-tian. A Research on E3 2 Algal-Reef Reservoir in Yuejin Area, Qaidam Basin, Northwestern China[J]. Acta Sedimentologica Sinica, 2002, 20(1): 61-69.
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A Research on E3 2 Algal-Reef Reservoir in Yuejin Area, Qaidam Basin, Northwestern China

  • 1 China Mineral University,Beijing 100083;

  • 2 Hangzhou Institute of Petroleum Geology, CNPC,Hangzhou 310023

  • Received Date: 2001-03-28
  • E 3 2 lacustrine stratum, located in Yuejin area, Qaidam Basin, northwestern China, is mainly composed of interbedded /intercalated carbonate rock mudstone. Terrigenous debris-bearing micrite,algea-originated laminated micrite,algea-originated stromatolitic micrite,algea-originated micrite and grainstone could be recognized in the carbonate rock, of which algea-originated laminated micrite and algea-originated stromatolitic micrite developed into good reservoir(oil-bearing) with a mean porosity of 25% and mean permeability of proximate 100×10 -3 μm 2. Meteoric water-seawater mixing dolomitization and dissolution in meteoric vadose zone were the main courses for reservoir development. Based on the research of diagenetic sequence, porosity evolution of the algea-originated laminated micrite and algea-originated stromatolitic micrite have been reconstructed. Furthermore, pore and throat diameters and their combinations have been discussed, which play an important role in petroleum development. The determination of spatial distribution for E 3 2 algal-reef micrite reservoir is very important in petroleum exploration in Yuejin area. Log and seismic data also play important roles in prediction of algal-reef micrite reservoir. High SP and SN values imply the exist of petroleum-bearing algal-reef micrite reservoir, while strong seismic reflection shows the lateral distribution of them. Based on the above discussion, spatial distribution of E 3 2 algal-reef micrite reservoir in Yuejin area have been mapped.
  • [1] Deffeyes K S,Lucia F J,Weyl P K.Dolomitization of recent and Plio-Pleistocene sediments by marine evaporite waters in Bonaire,Netherlands Antillies[A].In:Pray L C,Murry R C,eds.Dolomitization and Limestone Diagenesis[C].SEPM Spec.Publ.1965,13:71～88
    [2] Badiozamani K.The dorag dolomitization model-application to Middle Ordovician of Wisconsin [J].J.Sed.Petrology,1973,43:965～984
    [3] Mattes B W,Mountjoy E W.Burial dolomitization of the Upper Devonian Miette Buildup,Jasper National Park,Alberta[A].In:Zenger D H,Dunham J B,Ethington R L,eds.Concepts and Models of Dolomitization[C].SEPM Spec.Publ.1980,28:259～297
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  • Received:  2001-03-28

A Research on E3 2 Algal-Reef Reservoir in Yuejin Area, Qaidam Basin, Northwestern China

  • 1 China Mineral University,Beijing 100083;
  • 2 Hangzhou Institute of Petroleum Geology, CNPC,Hangzhou 310023
  • Received Date: 2001-03-28

Abstract: E 3 2 lacustrine stratum, located in Yuejin area, Qaidam Basin, northwestern China, is mainly composed of interbedded /intercalated carbonate rock mudstone. Terrigenous debris-bearing micrite,algea-originated laminated micrite,algea-originated stromatolitic micrite,algea-originated micrite and grainstone could be recognized in the carbonate rock, of which algea-originated laminated micrite and algea-originated stromatolitic micrite developed into good reservoir(oil-bearing) with a mean porosity of 25% and mean permeability of proximate 100×10 -3 μm 2. Meteoric water-seawater mixing dolomitization and dissolution in meteoric vadose zone were the main courses for reservoir development. Based on the research of diagenetic sequence, porosity evolution of the algea-originated laminated micrite and algea-originated stromatolitic micrite have been reconstructed. Furthermore, pore and throat diameters and their combinations have been discussed, which play an important role in petroleum development. The determination of spatial distribution for E 3 2 algal-reef micrite reservoir is very important in petroleum exploration in Yuejin area. Log and seismic data also play important roles in prediction of algal-reef micrite reservoir. High SP and SN values imply the exist of petroleum-bearing algal-reef micrite reservoir, while strong seismic reflection shows the lateral distribution of them. Based on the above discussion, spatial distribution of E 3 2 algal-reef micrite reservoir in Yuejin area have been mapped.

SUN Yan, SHEN An-jiang, XU Yang, LIN Nian-tian. A Research on E3 2 Algal-Reef Reservoir in Yuejin Area, Qaidam Basin, Northwestern China[J]. Acta Sedimentologica Sinica, 2002, 20(1): 61-69.
Citation: SUN Yan, SHEN An-jiang, XU Yang, LIN Nian-tian. A Research on E3 2 Algal-Reef Reservoir in Yuejin Area, Qaidam Basin, Northwestern China[J]. Acta Sedimentologica Sinica, 2002, 20(1): 61-69.
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