新疆石油地质

新疆石油地质 ›› 2011, Vol. 32 ›› Issue (4): 356-358.

• 油气勘探 • 上一篇    下一篇

库车坳陷下侏罗统碱性成岩环境对储集物性的影响

唐雁刚1, 罗金海2, 马玉杰1, 杨宪彰1, 叶茂林1, 何巧林1   

  1. 1.中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒 841000;
    2.西北大学地质学系,西安 710069
  • 收稿日期:2010-11-13 出版日期:2011-08-01 发布日期:2020-08-19
  • 作者简介:唐雁刚（1981-）,男,四川资阳人,助理工程师,石油地质,（Tel）0996-2175397（E-mail）tangyg-tlm@petrochina.com.cn.

Effect of Alkaline Diagenetic Environment of Lower Jurassic on Reservoir Property in Kuqa Depression

TANG Yan-gang1, LUO Jin-hai2, MA Yu-jie1, YANG Xian-zhang1, YE Mao-lin1, HE Qiao-lin1   

  1. 1. Research Institute of Exploration and Development, Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000, China;
    2. Department of Geology, Northwest University, Xi'an, Shaanxi 710069, China
  • Received:2010-11-13 Online:2011-08-01 Published:2020-08-19

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摘要： 煤系地层的成岩演化一般都会导致酸性成岩环境,但是对库车坳陷东部吐格尔明背斜构造带内下侏罗统阿合组粗碎屑岩中普遍存在的石英和方沸石溶蚀现象的研究表明,阿合组粗碎屑岩在成岩演化的早期阶段经历过由酸性向较强的碱性成岩环境过渡的过程,碱性环境下的钙质胶结物占据了碎屑颗粒之间的原生孔隙并提高了岩石的抗压实能力。后期的风化淋滤使钙质胶结物被溶解,从而使原生孔隙释放出来,导致该地区阿合组储集岩的物性普遍较好。因此,成岩阶段的碱性环境对阿合组碎屑岩储集层物性的后期改善具有重要作用。

关键词: 塔里木盆地, 库车坳陷, 吐格尔明背斜构造带, 阿合组, 碱性成岩环境, 储集层物性

Abstract: Diagenetic evolution of the coal measure strata usually results in the acidic diagenetic environment, but the quartz and analcime dissolutions in the coarse clastic rocks of Ahe formation of the Lower Jurassic in Tugeerming anticlinal structural belt in eastern Kuqa depression suggest that the stronger alkaline diagenetic environment probably exists during its early stage of diagenetic evolution. Calcite cement formed in the alkaline environment holds the original interstice between the clastic grains and strengthens the compactibility-resistance of the clastic rocks. In the late stage, calcite cements are dissolved due to weathering and eluviation, and the original interstices are released and the reservoir property of Ahe formation becomes better. For this reason, the alkaline diagenetic environment in the early stage plays an important role in improving the reservoir property of Ahe clastic rocks.

Key words: Tarim basin, Kuqa depression, Tugeerming structural belt, Ahe formation, Alkaline diagenetic environment, reservoir property

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