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孤东油田七区中馆4-馆6砂层组储层非均质性及其对剩余油分布的控制作用
引用本文:窦之林,董春梅,林承焰. 孤东油田七区中馆4-馆6砂层组储层非均质性及其对剩余油分布的控制作用[J]. 中国石油大学学报(自然科学版), 2002, 26(1)
作者姓名:窦之林  董春梅  林承焰
作者单位:石油大学地球资源与信息学院,山东东营,257061
基金项目:国家“973”重点基础发展规划项目 (G19990 2 2 5 0 8)
摘    要:根据孤东油田七区中馆 4—馆 6砂层组河流相疏松砂岩储层特征 ,将储层参数、流体性质的非均质性与生产动态紧密结合 ,分析了储层非均质性对注水开发效果的影响以及对剩余油分布的控制作用。研究结果表明 ,孤东油田七区中馆 4—馆 6砂岩储层非均质性强 ,对剩余油的分布具有明显的控制作用。在平面上 ,非主力相带砂体边缘和废弃河道的砂体以及高渗向低渗的过渡带形成了剩余油饱和度相对高值区。在垂向上 ,非主力小层砂岩分布局限 ,储层物性差 ,油层厚度薄 ,尽管其剩余油饱和度相对较高 ,但其剩余油储量有限 ;相反 ,主力小层的剩余油饱和度相对较低 ,但可采剩余油储量较大。储层层内非均质性包括简单正韵律、复杂正韵律、均质韵律、反韵律和复合韵律 5种形式。其中简单正韵律和复杂正韵律层内剩余油较富集 ,前者主要富集在层序中上部 ,而后者在层序内较多层段富集剩余油。

关 键 词:孤东油田  馆陶组  储层非均质性  剩余油分布

Controlling function of reservoir heterogeneity for remaining oil distribution in Guan 4—6 sand bed set in the center of seventh district of Gudong oilfield
DOU Zhi lin,DONG Chun|mei,LIN Cheng|yan.. Controlling function of reservoir heterogeneity for remaining oil distribution in Guan 4—6 sand bed set in the center of seventh district of Gudong oilfield[J]. Journal of China University of Petroleum (Edition of Natural Sciences), 2002, 26(1)
Authors:DOU Zhi lin  DONG Chun|mei  LIN Cheng|yan.
Abstract:The fourth to sixth sandstone reservoirs of Guantao formation in the middle part of the seventh block in Gudong oilfield are of high heterogeneity, which controls the distribution of remaining oil. In the plane, a zone with higher remaining oil saturation was formed in the sand edge of the non major facies, sandbody of margin and abandoned channel confined in distribution, and the transitional zone from high permeability to low permeability. In vertical section, the distribution of the non major reservoir sandstone is restricted. The porosity and permeability are low, and the thickness of oil reservoir is small. Although its remaining oil saturation is higher than others, the remaining petroleum in place is not abundant. On the contrary, the remaining oil saturation in major reservoir is lower, but its remaining recoverable reserve is abundant. There are five kinds of models for inlayer heterogeneity, including simple positive rhythm, complex positive rhythm, homogeneitg rhythm reverse rhythm and composite rhythm. Among these rhythms, the reservoirs with the simple positive rhythm and complex positive rhythm contain abundant remaining oil. The former accumulates remaining oil mainly in its middle and top part, and the latter contains remaining oil in several locations.
Keywords:Gudong oilfield  Guantao formation  reservoir heterogeneity  remaining oil distribution
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