摘要
砂、泥岩薄互层是东部地区含油气储层的一种重要类别，随着勘探程度的不断加深，研究对象从构造油藏逐渐过渡到了岩性油藏，迫切需要对有效储层及其含油气性进行识别和刻画，然而这类储层单层厚度一般都小于调谐厚度，受地震资料分辨率的限制，在常规地震剖面上难以识别。本文以苏北盆高邮凹陷地永安-联盟庄地区岩性油藏地震预测与评价为例，探讨砂、泥岩薄互层储层的地球物理识别方法。以测井资料为基础，进行地震正演模拟和岩石物理分析工作，确定本地区储层预测难点，测试合适的技术手段，逐步开展岩性区分和有利储层预测。
利用正演模拟得出研究区目标层段，孔隙度对储层密度和速度的影响最大，其次是泥质含量，流体饱和度影响最小，有利储层段的地震A VO类型为第一类。A VO属性能够反映储层的边界及储层内部的非均质性，并且可以较好地预测有利储层的分布。当地层厚度小于50m时，地震反射均方根振幅与砂层厚度呈正相关关系；纵、横波速度与孔隙度和泥质含量的回归关系式，回归相关系数高，可用于砂层孔隙度预测。陈冠希歌曲
在叠后地震反演工作中引入压实校正，使得纵波阻抗标准化和砂泥解释刻度的统一，在一定程度上提高了波阻抗的纵向分辨能力。在叠前地震反演基础上，利用弹性参数交汇分析法和贝叶斯判别统计法，预测了目标区有利储层分布，预测结果符合研究区地质规律，与实钻井相吻合。从储层反射特征研究着手，
综合运用叠前、叠后储层预测技术，建立了一套隐蔽油气藏储层地震综合预测的方法，为永安-联盟庄地区的储层描述提供了技术保障。
关键词：薄互层，地震正演，地震属性，地震反演
Rearch on rervoir prediction of thin sand-shale interbeded layers,
in Yong-Lian, Gaoyou Sag.Subei basin
Yu Yongsheng（Geologic Engineering）
Directed by Prof .Yue Youxi
Abstract
泰狮金鱼Thin sand-shale interbed is one of the important oil and gas rervoirs in the east category. With the deepening of exploration, the rearch objects transfer gradually from structural rervoirs to lithologic rervoirs, identification and characterization of effective rervoirs and its hydrocarbon potential is more and more important. However, the rervoir thickness of single layer is usually smaller than tuning thickness. Limited by the resolution of ismic data, it is difficult to identify this ki
nd of rervoirs form conventional ismic data. This paper discuss the geophysical identification method for thin sand-shale interbeded rervoir, take the application in Yong-Lian, Gaoyou Sag, Subei basinas for example. Bad on logging data, we u ismic forward modeling and rock physics analysis to determine difficult prediction points in this area, test the appropriate technology, carry out lithology identification and favorable rervoir prediction gradually.
江汉大学研究生Through forward modeling, we find that, porosity has the biggest influence on rervoir’s density and velocity, the cond influence is clay content, the minimum is fluid saturation. The A VO of favorable rervoir is type I. AVO attributes can reflect the boundary and inner heterogeneity of the rervoir , and also can favor prediction of the distribution of beneficial rervoirs. When rervoir thickness is less than 50m, the amplitude of the ismic reflection is positively correlated with the thickness of the sand layer. We derived the regression relation between P-wave and S-wave velocity and porosity as well as clay content. If regression coefficient is high, we can calculate porosity of the rervoirs.
Compaction correction is introduced into post stack ismic inversion, so that the normalization of P-wave impedance and the interpretation scale of sand and clay are unified, and the vertical resolving power of wave impedance is improved to a certain extent. Bad on prestack ismic inversion, usin
g elastic parameter crossplot analysis and Bayes discriminate statistics, we predict the favorable rervoir distribution, prediction results agree well with the
geological information and well logging data in the study area. Beginning from the study of rervoir reflection characteristics, this paper establishes a t of methods for integrated ismic prediction of complex and subtle rervoirs through comprehensive application of prestack and post-stack rervoir prediction techniques. The method provides technical support for the rervoir description in Yong'an - Lianmeng Zhuang area.
Keywords: thin sand-shale interbeded layers, ismic forward modeling, ismic attribute analysis, ismic inversion
目录
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第一章前言 (1)
1.1 研究目的及意义 (1)
1.2 国内外研究现状 (1)哪吒经典台词
1.2.1 构造解释技术 (1)
1.2.2 地震正演技术 (1)
1.2.3 地震属性分析技术 (2)
1.2.4 地震反演技术 (3)
1.3 研究内容及技术路线 (4)
1.4 取得研究成果 (5)
第二章研究区概况与储层地震响应特征分析 (7)
2.1 研究区概况 (7)
2.1.1 地质概况 (7)
2.1.2 资料情况 (9)
2.2 储层地震响应特征分析 (14)
2.2.1 基于褶积模型的地震正演 (14)
2.2.2 理想模型正演模拟与分析 (15)
2.2.3 速度模拟 (18)
2.2.4 A VO模拟及特征分析 (21)
第三章叠后储层预测技术应用 (24)
3.1 地震资料构造精细解释 (24)
3.1.1 解释方法和思路 (24)
3.1.2 构造样式分析 (24)
3.1.3 构造解释成果 (25)
3.2 叠后地震属性分析技术及应用 (26)
3.2.1 地震属性提取 (27)
3.2.2 地震属性优选与标定 (30)
3.3 叠后地震反演技术及应用 (31)
3.3.1 叠后反演技术概述 (31)
3.3.2 井震标定和子波提取 (32)
3.3.3 波阻抗数据的压实效应校正 (34)
3.3.4 叠后波阻抗反演应用 (34)
第四章叠前储层预测技术应用 (37)
4.1 横波估算及弹性参数敏感性分析 (37)
4.1.1 横波估算 (37)
4.1.2 弹性参数敏感性分析 (38)
4.2 叠前储层预测技术 (43)
89年是什么命
4.2.1叠前A VO反演技术 (43)
4.2.2 弹性阻抗反演技术 (50)
4.3 叠前储层预测技术应用 (52)
4.3.1 A VO响应特征 (52)
4.3.2 A VO属性分析 (53)
4.3.3 叠前地震反演 (55)
第五章储层物性及流体预测 (58)
5.1 弹性参数分析 (58)
5.1.1纵波阻抗与纵横波速度比交汇解释法的适用性分析 (58)养生健康
5.1.2岩性敏感弹性参数交汇解释及岩性识别 (59)
5.1.3流体敏感弹性参数交汇解释及流体识别 (60)
5.2 储层厚度预测 (62)
5.3 储层孔隙度预测 (64)
5.4 储层流体预测 (66)
5.5 成果应用简述 (70)
第六章结论 (71)
参考文献 (72)
攻读硕士期间取得的成果 (74)
致谢 (75)令誉
