THE CHARACTERISTICS AND AFFECTING FACTORS OF GLUTENITE RESERVOIRS IN NORTHERN YONGXIN AREA OF DONGYING SAG
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摘要: 东营凹陷位于济阳坳陷的东南部。通过岩心观察、薄片鉴定、物性分析、扫描电镜观察等技术手段, 研究了东营凹陷永北地区砂砾岩体储集层的主要岩石类型、储集空间类型、物性特征和影响因素。研究结果表明, 砂砾岩体岩石学特征具有成分成熟度和结构成熟度低的特点; 主要储集空间类型为粒间溶孔和粒内溶孔, 铸膜孔和胶结物溶蚀孔也具有一定的储集意义。影响本区储集物性的因素主要有埋藏深度、成岩作用以及沉积相带, 其中埋藏深度是控制储集层物性的主要因素。Abstract: The Dongying sag is located in southeastern part of the Jiyang Depression. A study has been made on main rock types, type of reservoir space, physical characteristics and affecting factors of the glutenite reservoirs in northern Yongxin area in the Dongying sag based on core observation, thin section analysis, physical property analysis, scanning electron microscopy. The results show that the glutenites are of a low compositional maturity and textural maturity, and the reservoir spaces are intergranular corroded hollow, moldic pore and cementing corroded hollow. The dominant factors affecting physical characteristics of the reservoirs include burying depth, diagenism and sedimentary facies, of which the burying depth serves as a fundamental factor affecting physical properties of the reservoirs.
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Key words:
- glutenite /
- physical characteristics /
- affecting factor
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图 2 永北不同地区孔隙垂向演化与分布
Figure 2. Vertical evolution and distribution of the pores in different areas in northern Yongxin
图 3 永921-25井沙四段深度与孔隙度关系
Figure 3. Relationship between depth and porosity of No.4 Member of Shahejie Formation in Well Yong 921-25
图 4 永921-30井沙四段渗透率与深度关系
Figure 4. Relationship between permeability and depth of No.4 Member of Shahejie Formation in Well Yong 921-30
图 5 东营凹陷北部地区砂砾岩成岩作用与孔隙演化
Figure 5. Diagenesis and pore evolution of glutenite in northern area of Dongying sag
表 1 永921-18井物性参数表
Table 1. Physical properties of the Well Yong 921-18
表 2 永921井物性参数表
Table 2. Physical properties of the Well Yong 921
表 3 盐182井物性参数表
Table 3. Physical properties of the Well Yan 182
表 4 盐18井物性参数表
Table 4. Physical properties of the Well Yan 18
表 5 永北地区砂砾岩储集层成岩阶段划分
Table 5. Classification of diagentic stages of glutenite reservoir in northern Yongxin area
表 6 永北地区物性参数统计表
Table 6. Physical properties in northern Yongxin area
表 7 不同地区扇三角洲沉积不同微相物性特征对比
Table 7. Comparison of physical properties of different microfacies in fan delta in different areas
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