厚油层层内夹层分布对水驱效果影响的物理实验研究  

Physical experiment on distribution of interlayers impact on water flooding recoveryefficiency

作　　者：屈亚光[1] 丁祖鹏[1] 潘彩霞[1] 申健[1] 姚泽[1] 

机构地区：[1]中海油研究总院海洋石油高效开发国家重点实验室,北京100027

出　　处：《油气地质与采收率》2014年第3期105-107,110,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"海上油田丛式井网整体加密及综合调整技术"(2011ZX05024-002)

摘　　要：夹层是影响油藏开发动态特征和剩余油分布规律的重要因素。油田开发实践证实,由于沉积、成岩等地质作用不同,会形成不同的夹层,因其成因、特点和分布又有较大差异,因此它们对油田的水驱规律的影响亦不同。基于厚油层设计的层内夹层分布理想模型,首先研究了夹层对韵律性储层注水井层内射孔位置的影响,然后以反韵律储层为对象,分别研究了夹层分布位置及范围对注采井网水驱效果的影响。结果表明,当厚油层层内夹层发育且存在渗透率级差时,注水井射孔时应尽量射开层内高渗透区域;对于反韵律储层,当夹层处于采油井附近区域时,夹层对水驱影响程度最小,其次是夹层位于注采井间,而夹层位于注水井附近影响程度最大,其水驱效果最差,同时随着夹层范围的扩大,水驱效果逐渐变差。Interlayers are one of the main factors controlling the formation and distribution of remaining oil and development perfor-mance. Interlayers are controlled and influenced by different geological processes, such as sedimentation and diagenesis. The features,distribution and origin of the interlayers are different, which lead to different rule of oil-water movement. Based on designed ideal mod-el of interlayers, twelve physical experiment models are built. Impact of interlayers on perforations of injection well in rhythmicity reser-voir and the impact of distribution, range of the interlayer on water flooding recovery efficiency are studied. It can be concluded that,the injection well should be perforated at high permeability zone for rhythmicity reservoir. And, for reverse rhythm reservoir, when theinterlayer is distributed around production well the influence degree on water flooding recovery efficiency is the lowest. As interlayergrows insize inreverse rhythmreservoir, the water flooding recovery efficiencygets worse.

关 键 词：夹层 物理实验 水驱 韵律性 射孔 

分 类 号：TE341[石油与天然气工程—油气田开发工程]