摘要
为明确碳酸盐岩潜山不同级别构造裂缝的分布规律,观察并统计了渤海湾盆地富台油田奥陶系碳酸盐岩储层岩心裂缝特征,以裂缝开度和流体在裂缝中流态为依据将富台潜山裂缝划分为3个级别,并应用数值模拟方法计算出各层位不同级别构造裂缝分布情况。研究结果表明,富台潜山奥陶系储层构造裂缝可以划分为大裂缝（开度大于1.0mm）、中裂缝（开度为0.5~1.0mm）、小裂缝（开度小于0.5mm）。不同级别裂缝分布主要受到构造部位、断层和岩性控制,数值模拟结果显示大裂缝主要在八陡组、上马家沟组和下马家沟组的背斜核部及断层附近发育,中裂缝主要在背斜翼部及冶里组—亮甲山组发育,小裂缝在研究区发育较少,零星分布于八陡组和上马家沟组。
In order to analyze the distribution of different levels of tectonic fractures in carbonate buried hills,based on core observation and statistics of carbonate reservoirs of Ordovician in Futai Oilfield in Bohai Bay Basin,tectonic fractures are divided into three levels according to aperture and fluid phase behavior in fractures.The distribution of different levels tectonic fractures in each formation is numerically simulated subsequently.The results indicate as follows,tectonic fractures in carbonate reservoirs of Ordovician in Futai buried hill can be divided into large aperture fracture（aperture1.0mm）,medium aperture fracture（aperture：0.5-1.0mm）and small aperture fracture（aperture0.5mm）.Distribution of different levels of tectonic fractures is affected by tectonic position,faults and lithological characters.The numerical simulation results show that large aperture fractures mainly distribute in anticline core and near faults in O2bd,O2 smand O2 xm.Medium aperture fractures mainly distribute in anticline flank and O1 y.Small aperture fractures scatter in O2 bdand O2 sm.
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2013年第6期1260-1267,共8页
Natural Gas Geoscience
基金
国家重大科技专项课题"复杂裂缝性碳酸盐岩油藏开发关键技术"(编号:2011ZX05014-004)
中央高校基本科研业务费专项资金(编号:12CX06004A)联合资助
关键词
碳酸盐岩潜山
构造裂缝
裂缝级别
数值模拟
Carbonate buried hills
Tectonic fracture
Fracture levels
Numerical simulation
