| 火山地层结构特征及其对波阻抗反演的约束 |
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| 引用本文： | 唐华风,李瑞磊,吴艳辉,冯晓辉,王力圆.火山地层结构特征及其对波阻抗反演的约束[J].地球物理学报,2011,54(2):620-627. |
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| 作者姓名： | 唐华风 李瑞磊 吴艳辉 冯晓辉 王力圆 |
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| 作者单位： | 1. 吉林大学 地球科学学院,长春 130061;
2. 中石化东北油气分公司 勘探开发研究院,长春 130062 |
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| 基金项目： | 国家973项目(2009CB219303)国家自然科学青年基金，吉林大学科学前沿与交叉学科创新项目 |
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| 摘 要： | 火山地层是由似层状、层状和块状结构组成的复合体,其地层结构的拟合是火山岩储层地震预测的难点所在,火山地层结构模型的建立是火山岩勘探开发中首先需要解决的关键问题.通过对九台和大屯典型火山岩地层结构的解剖,分析似层状结构和层状结构特征.似层状结构地层内部的岩层倾向和倾角变化大,与地层顶底面表现为斜交.从火山机构喷发中心到远...
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| 关 键 词： | 松辽盆地 白垩系营城组 火山地层学 结构模型 波阻抗反演 |
| 收稿时间： | 2010-04-06 |
Textural characteristics of volcanic strata and its constraint to impedance inversion |
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| TANG Hua-Feng,LI Rui-Lei,WU Yan-Hui,FENG Xiao-Hui,WANG Li-Yuan.Textural characteristics of volcanic strata and its constraint to impedance inversion[J].Chinese Journal of Geophysics,2011,54(2):620-627. |
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| Authors: | TANG Hua-Feng LI Rui-Lei WU Yan-Hui FENG Xiao-Hui WANG Li-Yuan |
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| Institution: | 1. College of Earth Sciences, Jilin University, Changchun 130061, China;
2. Northeast Branch, SINOPEC, Changchun 130062, China |
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| Abstract: | Volcanic strata have pseudostratified, stratified and massive textures which are more complex than sedimentary rocks. Thus, it should not simply be simulated with stratified models, and it results in a difficulty in volcanic reservoir prediction with seismic data. A primary key point for volcanic reservoir exploration and development is to build up proper volcanostratigraphic models. Both pseudostratified and stratified models are built up based on typical volcanostratigraphic textures of outcrops of Jiutai and Datun area in the southeastern Songliao Basin. The internal beds of pseudostratified strata show great changes in dipping direction and angles, and contact obliquely with the top and bottom strata. The dip angle of volcanic rock bed decreases from central to distal parts along a given edifice's limb, and the exact stratigraphic textural model is built up by interpolation following the top and/or bottom surface trends. A borehole named as Well YS2 is selected to perform impedance inversion constrained by stratified and pseudostratified models respectively. As a result, both the dimension and thickness of low-impedance show significant differences between the stratified model and the pseudostratified model. Therefore, the stratigraphic texture of volcanic edifice should be precisely characterized before impedance inversion, and then the stratigraphic textural model is built up with internal interpolation to ensure the inversion reliability. This study offers a theoretical basis for effective exploration of volcanic petroleum reservoirs. |
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| Keywords: | Songliao Basin Yingcheng Formation Lower Cretaceous Volcanostratigraphy Textural model Impedance inversion |
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