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塔里木盆地志留系盖层综合评价
引用本文:王显东,姜振学,庞雄奇,张俊.塔里木盆地志留系盖层综合评价[J].西安石油大学学报(自然科学版),2004,19(4):49-54.
作者姓名:王显东  姜振学  庞雄奇  张俊
作者单位:石油大学,盆地与油藏研究中心,北京,昌平,102249;石油大学,石油天然气成藏机理教育部重点实验室,北京,昌平,102249
基金项目:国家“973”项目“中国典型叠合盆地油气聚散定量研究 (G19990 43 3 10 )”项目,“塔里木盆地台盆区大油气田形成条件与有利勘探方向预测”课题资助
摘    要:将塔里木盆地志留系盖层的宏观与微观评价相结合 ,能更好地对盖层封油气能力进行综合评价 ,对塔里木盆地志留系下一步的油气勘探具有一定指导意义 .通过研究盖层岩石发育的沉积环境、盖层岩性、厚度分布 ,揭示了泥岩盖层平面上的延展性、连续性和稳定性 ;通过统计志留系已发现的沥青砂岩及各种油气显示分布与盖层之间的关系 ,分析了盖层对油气封堵作用的有效性 ;结合盖层样品实际突破压力测定 ,建立盖层封闭性综合评价指数与评价标准 ,对盖层的封油气能力进行了评价 .研究表明 :塔里木盆地志留系红色泥岩段和下砂岩段中亚段两套泥岩盖层具有较强的封油气能力 ,对志留系油气藏的形成与保存具有极其重要的作用

关 键 词:塔里木盆地  志留系  盖层封油气能力  盖层综合评价
文章编号:1001-5361(2004)04-0049-05
修稿时间:2004年3月25日

Comprehensive evaluation of sealing ability of Silurian cap rocks in Talimu Basin
WANG Xian-dong.Comprehensive evaluation of sealing ability of Silurian cap rocks in Talimu Basin[J].Journal of Xian Shiyou University,2004,19(4):49-54.
Authors:WANG Xian-dong
Institution:WANG Xian-dong~
Abstract:By combining the macroscopic evaluation with the microscopic evaluation of the sealing ability of the Silurian cap rocks in Talimu Basin, the better evaluation results can get, which is of importance to guiding the following exploration of this area. The literal distribution of the cap rocks and its continuity and stability are known by studying their sedimentary environment, lithology and thickness. The effectiveness of the cap rock sealing petroleum is analyzed by studying the relationship between Silurian bituminous sandstone and the oil and gas shows found during drilling and the cap rocks. The comprehensive evaluation index and the grade evaluation criteria of cap rock sealing ability are put forward according to the macroscopic characteristics of cap rocks including their thickness, distribution, sedimentary environment and so on, the microscopic characteristics obtained through measuring the breakthrough pressure of cap rock samples, and the relationship between acoustic interval transit times and sealing ability of cap rocks, so the better comprehensive evaluation results can be obtained. The evaluation results show that the mudstone cap rocks of Silurian formation in Talimu Basin all have better sealing ability, which is important to the formation and the conservation of Silurian oil reservoirs.
Keywords:Talimu Basin  Silurian  sealing ability of cap rocks  comprehensive evaluation of cap rock
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