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Article Navigation >  Acta Sedimentologica Sinica  > 2002  >  20(4): 628-632

YANG Xiao ping, QIU Yi nan. Formation Process and Distribution of Laumontite in Yanchang Formation (Upper Triassic) of Ordos Basin[J]. Acta Sedimentologica Sinica, 2002, 20(4): 628-632.
Citation: YANG Xiao ping, QIU Yi nan. Formation Process and Distribution of Laumontite in Yanchang Formation (Upper Triassic) of Ordos Basin[J]. Acta Sedimentologica Sinica, 2002, 20(4): 628-632.
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Formation Process and Distribution of Laumontite in Yanchang Formation (Upper Triassic) of Ordos Basin

  • 1 China University of Mining and Technology,Beijing 100083;

  • 2 Petroleum Institute of Exploration and Development of CNPC,Beijing 100083

  • Received Date: 2001-10-08
  • Rev Recd Date: 2002-01-07
  • Laumonti te cement is mainly distributed in the Yanchang 6 reservoir of the no rtheast Ordos basin.Through measuring inclusions in laumontite, we know that its is forming temperature is between 60 ℃and 70 ℃ and it formed in the B period of early diagenetic stage.How ever, in the A period of later diagenetic stage, laumontite were dissolved by organic acid which was generated in decarboxylation of kerogen, and a great quantity of secondary pores were formed.Exploration results have proved that newly found reservoirs are largely dist ributed in the laumontite secondary pore zone.Thus, the formation process and distribution of laumontite cement are very important for exploring reservoirs and hydrocarbon accumulat ion.In the paper, with the investigations of outcrop,thin section, organic inclusion, scanning elect ronmicroscope and elect ron microprobe, the relationship of the forming process, distribution of laumontite cement and sedimentary microfacies is studied on the basis of sedimentary microfacies.The purpose is that laumontite distribution is predicted by sedimentary microfacies.As a result, reservoir distribution is predicted.
  • [1] 朱国华. 陕北浊沸石次生孔隙砂体的形成与油气关系[J]. 石油学报,1985,6(1):1～8[Zhu Guohua.Formation of secondary porous laumontite sandstone and the relation with the oil and gas in north Shaanxi[J].Acta Petrolei Sinica,1985,6(1):1～8]
    [2] 张立飞. 陕北鄂尔多斯盆地埋藏变质作用研究[J]. 地质学报,1992,66(4):34～39[Zhang Lifei.Study on burial metamorphism in Ordos Basin[J].Acta Geologica Sinica,1992,66(4):34～39]
    [3] 赵孟为. 鄂尔多斯盆地浊沸石的形成温度及其意义[J].石油学报,1995,16(9):58～63[Zhao Mengwei.Formation temperature of laumontite of Ordos Basin[J].Acta Petrolei Sinica,1995,16(9):58～63]
    [4] Richard L Hay. Zeolites and Zeolitic Reactions in Sedimentary Rock[M]. The Geological Society of America, INC New York. 1966
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  • Received:  2001-10-08
  • Revised:  2002-01-07

Formation Process and Distribution of Laumontite in Yanchang Formation (Upper Triassic) of Ordos Basin

  • 1 China University of Mining and Technology,Beijing 100083;
  • 2 Petroleum Institute of Exploration and Development of CNPC,Beijing 100083
  • Received Date: 2001-10-08
  • Rev Recd Date: 2002-01-07

Abstract: Laumonti te cement is mainly distributed in the Yanchang 6 reservoir of the no rtheast Ordos basin.Through measuring inclusions in laumontite, we know that its is forming temperature is between 60 ℃and 70 ℃ and it formed in the B period of early diagenetic stage.How ever, in the A period of later diagenetic stage, laumontite were dissolved by organic acid which was generated in decarboxylation of kerogen, and a great quantity of secondary pores were formed.Exploration results have proved that newly found reservoirs are largely dist ributed in the laumontite secondary pore zone.Thus, the formation process and distribution of laumontite cement are very important for exploring reservoirs and hydrocarbon accumulat ion.In the paper, with the investigations of outcrop,thin section, organic inclusion, scanning elect ronmicroscope and elect ron microprobe, the relationship of the forming process, distribution of laumontite cement and sedimentary microfacies is studied on the basis of sedimentary microfacies.The purpose is that laumontite distribution is predicted by sedimentary microfacies.As a result, reservoir distribution is predicted.

YANG Xiao ping, QIU Yi nan. Formation Process and Distribution of Laumontite in Yanchang Formation (Upper Triassic) of Ordos Basin[J]. Acta Sedimentologica Sinica, 2002, 20(4): 628-632.
Citation: YANG Xiao ping, QIU Yi nan. Formation Process and Distribution of Laumontite in Yanchang Formation (Upper Triassic) of Ordos Basin[J]. Acta Sedimentologica Sinica, 2002, 20(4): 628-632.
shu

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