深埋藏砂岩储层中异常孔隙的保存机制探讨Preservation Mechanisms of Abnormal Porosity in Deeply Buried Sandstone Reservoirs
肖军;王华;袁立川;姜华;陈少平;
摘要(Abstract):
通常情况下,砂岩储层的孔隙度和渗透率随埋深的增大而减小,但越来越多的地质实践表明深埋藏(>3500 m)的砂岩储层在一些特定情况下可以保持异常高的孔隙度和渗透率。有多种成因机制可以使其孔隙在深埋藏条件下得以保存,主要包括:①早期烃类的充注;②颗粒包层和(或)颗粒环边的存在;③流体超压的存在;④次生孔隙的发育。在综合国内外大量相关文献的基础上,对这些成因机制进行了深入的探讨,并给出了相应的实例。这些研究将为油田的储层评价、储量预测等勘探开发工作提供进一步的决策依据。
关键词(KeyWords): 深埋藏;砂岩储层;异常孔隙;保存机制
基金项目(Foundation): 国家“十五”重大科技攻关项目(2004BA616A);; 中国地质大学(武汉)2005年度优秀青年教师资助计划项目(CUGQNL0511)
作者(Author): 肖军;王华;袁立川;姜华;陈少平;
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参考文献(References):
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