低渗透砂岩微孔特征与孔隙结构类型的关系——以东营凹陷南斜坡沙四段为例
发布时间：2019-08-17 21:39
【摘要】：低渗透砂岩已成为油气增储上产的重要勘探开发目标,但孔隙结构类型多样、微孔发育使得测井响应特征难以明显反映储层及其有效性。利用压汞、核磁共振、物性、薄片及CT等资料分析东营凹陷南斜坡沙四段(Es_4)低渗透滩坝砂岩孔隙结构,并将其划分为三大类五小类,即:Ⅰ类(Ⅰ_1和Ⅰ_2)、Ⅱ类(Ⅱ_1和Ⅱ_2)和Ⅲ类。孔隙结构类型受控于矿物、粒径及成岩作用等的综合影响,微孔(孔喉半径0.024 8μm)含量及其特征是造成孔隙结构类型差异的重要因素。在此基础上,分析矿物含量、粒径、电性与微孔含量的关系,发现矿物、粒径影响微孔含量及特征,且微孔含量与电性特征关系密切。利用测井曲线对低渗透砂岩微孔含量变化的敏感性,有助于在井筒剖面进行孔隙结构类型划分及识别有效储层。
[Abstract]:Low permeability sandstone has become an important exploration and development target for oil and gas reservoir increase and production, but the pore structure types are diverse, and the development of micropores makes it difficult to reflect the reservoir and its effectiveness obviously. Based on the data of mercury injection, nuclear magnetic resonance (NMR), physical properties, thin sheet and CT, the pore structure of Es_4 low permeability beach bar sandstone in the south slope of Dongying sag is analyzed and divided into three categories and five categories, namely, class I (鈪，
本文编号：2528044
[Abstract]:Low permeability sandstone has become an important exploration and development target for oil and gas reservoir increase and production, but the pore structure types are diverse, and the development of micropores makes it difficult to reflect the reservoir and its effectiveness obviously. Based on the data of mercury injection, nuclear magnetic resonance (NMR), physical properties, thin sheet and CT, the pore structure of Es_4 low permeability beach bar sandstone in the south slope of Dongying sag is analyzed and divided into three categories and five categories, namely, class I (鈪，
本文编号：2528044
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