新疆石油地质

新疆石油地质 ›› 1997, Vol. 18 ›› Issue (3): 208-211.

• 地质勘探 • 上一篇    下一篇

塔里木盆地志留系泥质岩盖层封闭性能与油气聚集

石强, 沈珏红   

  1. 中国石油天然气总公司石油勘探开发科学研究院廊坊分院 廊坊 102801
  • 收稿日期:1996-06-26 出版日期:1997-09-01 发布日期:2021-01-18
  • 作者简介:石强, 助理工程师 地球物理测井

SEALING ABILITY OF SILURIAN SHALE CAPROCK WTTH RELATION TO HYDROCARBON ACCUMULATION IN TARIM BASIN

Shi Qiang, Shen Juehong   

  1. Langfang Branch, Scientific Research Institute of Petroleum Exploration and Development, CNPC, Langfang, Hebei 102801
  • Received:1996-06-26 Online:1997-09-01 Published:2021-01-18
  • About author:Shi Qiang,Assistant Engineer, Well Logging Geology

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摘要： 含油气盆地中的泥质岩盖层在不同成岩阶段,其封闭性能也不同:早成岩阶段,随着沉积物的压实、固结,盖层的封闭性逐步形成;晚成岩阶段由于地层塑性降低,易产生微裂缝,盖层封闭性能逐步变差。笔者根据测井资料,利用先进的储盖组合测井解释方法对塔里木盆地志留系盖层的封闭性能进行研究,认为志留系蓋层已演化至不利于油气保存阶段,盖层封闭性是影响油气聚集的关键因素之一。

关键词: 塔里木盆地, 志留纪, 盖层, 油气聚集, 测井解释

Abstract: The shale caprock at different diagenetic stages in the petroliferous basin has different sealing abilities. At early period the sealing ability of caprock gradually formed with the compaction and consolidation of the sediments, while at late period the sealing ability becomes worse due to the reduced ductility resulting in the microfracture. We considered the sealing ability of Silurian caprock in Tarim basin by using the advanced reservoir-caprock assemblage logging interpretation method. It is suggested that the caprock evolved too much to favor the hydrocarbon preservation. Thus its sealing ability is the key to hydrocarbon accumulation.

Key words: Tarim basin, Silurian, Caprock, Hydrocarbon accumulation, Log interprelation