波形分类技术在鄂北薄砂岩储层预测中的应用

doi:10.11743/ogg20120406

摘要/Abstract

摘要：

在河流相砂体的沉积过程中,砂泥岩在空间上的位置、厚度方面可以形成多种岩性组合模式,因此其对应的地震反射波会有不同的波形。应用神经网络波形分类技术,可以对波形进行分析、归纳,从而实现在区域上预测砂体的沉积相分布状况。考虑到低分辨率的地震资料和薄砂层之间的矛盾,谨慎的保幅性提频处理是需要的,但须以更高的井-震相关性及不变的横向振幅关系为前提。针对鄂尔多斯盆地大牛地气田二叠系下石盒子组盒三段的沉积特征,采用神经网络波形分类技术对反映不同岩性组合模式的地震波形进行相关和归类,预测出了多种砂体沉积模式的平面展布趋势。通过与由实际钻井得到的砂体分布图进行对比,发现二者有较好的一致性,说明波形分类技术可以快速有效地预测砂体的分布规律并且对于薄砂体具有较好分辨能力。

关键词: 河流相, 波形分类, 地震, 砂体, 大牛地气田, 鄂尔多斯盆地

Abstract:

During the deposition of fluvial sand body,various lithological assemblages can be formed due to different spatial distribution and thickness of sandstones and mudstones,and their corresponding seismic reflections have different waveform patterns.The technique of the neural network waveform classification can be used to analyze and summarize their seismic waveforms,and then predict regional distribution of sandstone sedimentary facies.Considering the low resolution of the seismic data and the thin thickness of sand layers,it is necessary to do a band spread processing with fidelity.However,this processing should be based on higher correlations between wells and seismic data and stable lateral amplitude trends.According to the sedimentary characteristics of the 3rd member of the Permian Xiashihezi Formation in Daniudi gas field in the Ordos Basin,we performed correlation and classification of seismic waveforms which reflect different lithological assemblages by using the neural network waveform classification technique,and predicted the distribution of several sandstone sedimentary models.Comparison with well data-based sandbody distribution map shows that they are consistent.The technique is quick and effective for sandbody prediction and has a better resolution for thin sand bodies.

Key words: fluvial faces, waveform classification, seismic, sand body, Daniudi gas field, Ordos Basin

中图分类号:

TE132.1

佘刚,周小鹰,戴明刚,等. 波形分类技术在鄂北薄砂岩储层预测中的应用[J]. 石油与天然气地质, 2012, 33(4): 536-540. doi: 10.11743/ogg20120406 She Gang,Zhou Xiaoying,Dai Mingang,et al. Application of seismic waveform classification technique in thin sandstones reservoir prediction in northern Ordos Basin[J]. Oil & Gas Geology, 2012, 33(4): 536-540. doi: 10.11743/ogg20120406

参考文献

[1] 杨占龙,陈启林,沙雪梅,等.关于地震波形分类的再分类研究[J].天然气地球科学,2008,19(3):377-380. Yang Zhanlong,Chen Qilin,Sha Xuemei,et al.Reclassification research of seismic waveform classification[J].Natural Gas Geoscience,2008,19(3):377-380.
[2] 邓传伟,李莉华,金银姬,等.波形分类技术在储层沉积微相预测中的应用[J].石油物探,2008,47(3),262-265. Deng Chuanwei,Li Lihua,Jin Yinji,et al.Application of seismic waveform classification in predicting sedimentary microfacies [J].Geophysical Prospecting for Petroleum,2008,47(3),262-265.
[3] 李雷涛,肖秋红.地震波形分类技术在地震相分析中的应用[J].天然气技术,2010,4(5):4-7. Li Leitao,Xiao Qiuhong.Application of seismic-waveform classification to seismic-facies analysis:an example from qingxichang area [J].Natural Gas Technology,2010,4(5):4-7.
[4] 王锦程,刘子藏,李勇,等.地震波形分类技术在黄骅坳陷孔三段沉积体系分析中的应用[J].沉积与特提斯地质,2011,31(1):80-84. Wang Jincheng,Liu Zicang,Li Yong,et al.The application of seismic waveform classification techniques to the depositional systems in the 3rd member of the Kongdian Formation,Huanghua depression [J].Sedimentary Geology and Tethyan Geology,2011,31(1):80-84.
[5] 江青春,王海,李丹,等.地震波形分类技术应用条件及其在葡北地区沉积微相研究中的应用[J].石油与天然气地质,2012,33(1):135-140. Jiang Qingchun,Wang Hai,Li Dan.Application conditions of seismic waveform classification technique and its use in the study of sedimentary microfacies of Pubei area[J].Oil & Gas Geology,2012,33(1):135-140.
[6] 关达,张卫华,管路平,等.相控储层预测技术及其在大牛地气田D井区的应用[J].石油物探,2006,45(3):231-233. Guan Da,Zhang Weihua,Guan Luping,et al.Reservoir prediction under the constraint of seismic or sediment phase and application to DND gas field [J].Geophysical Prospecting for Petroleum,2006,45(3):231-233.
[7] 刘忠群.大牛地气田盒3段三维地震储层预测研究[J].勘探地球物理进展,2008,31(2):133-136. Liu Zhongqun.Reservoir prediction of H3 segment in Daniudi gas field with 3-D seismic[J].Progress in Exploration Geophysics,2008,31(2):133-136.
[8] 刘保国,刘力辉.实用地震沉积学在沉积相分析中的应用[J].石油物探,2008,47 (3):266-271. Liu Baoguo,Liu Lihui.Application of applied seismic sedimentology in sedimentary facies analysis [J].Geophysical Prospecting for Petroleum,2008,47 (3):266-271.
[9] 许杰,何治亮,董宁,等.鄂尔多斯盆地大牛地气田盒3段河道砂岩相控储层预测[J].石油与天然气地质,2009,30(6):692-696. Xu Jie,He Zhiliang,Dong Ning,et al.Facies-constrained reservoir prediction of P₁h³ channel sandstone in Daniudi gasfield,the Ordos Basin[J].Oil & Gas Geology,2009,30(6):692-696.
[10] 陈昭佑,王光强.鄂尔多斯盆地大牛地气田山西组砂体组合类型及成因模式[J].石油与天然气地质,2010,31(5):632-639. Chen Zhaoyou,Wang Guangqiang.Assemblage types and genetic models of the Shanxi sandbodies in Daniudi gasfield,the Ordos Basin[J].Oil & Gas Geology,2010,31(5):632-639.
[11] 张广权,陈舒薇,郭书元.鄂尔多斯地区东北部大牛地气田山西组沉积相[J].石油与天然气地质,2011,31(3):338-396,403. Zhang Guangquan,Chen Shuwei,Guo Shuyuan.Sedimentary facies of the Shanxi Formation in Daniudi gas field,northeastern Ordos area[J].Oil & Gas Geology,2011,31(3):338-396,403.
[12] 张永贵,刘振峰.鄂尔多斯盆地北部上古生界致密砂岩气藏储层建模[J].石油与天然气地质,2011,32(4):560-567. Zhang Yonggui,Liu Zhenfeng.Reservoir modeling of tight gas sands in the Upper Palaeozoic of the northern Ordos Basin[J].Oil & Gas Geology,2011,32(4):560-567.
[13] 张文旗,王志章,侯秀林,等.盖层封盖能力对天然气聚集的影响——以鄂尔多斯盆地大牛地气田大12井区为例[J].石油与天然气地质,2011,32(6):882-889. Zhang Wenqi,Wang Zhizhang,Hou Xiulin,et al.Influences of caprock sealing capacity on natural gas accumulation:an example from D-12 wellblock of Daniudi gas field in Ordos Basin[J].Oil & Gas Geology,2011,32(5):882-889.
[14] 刘双莲,李浩,周小鹰.大牛地气田大12-大66井区沉积微相与储层产能关系[J].石油与天然气地质,2012,33(1):45-49. Liu Shuanglian,Li Hao and Zhou Xiaoying.Relationship between sedimentary microfacies and reservoir productivity in Da12-Da66 wellblock,Daniudi gas field[J].Oil & Gas Geology,2012,33(1):45-49.
[15] 侯瑞云,刘忠群.鄂尔多斯盆地大牛地气田致密低渗储层评价与开发对策[J].石油与天然气地质,2012,33(1):118-128. Hou Ruiyun,Liu Zhongqun.Resevoir evaluation and development strategies of Daniudi tight sand gas field in the Ordos Basin[J].Oil & Gas Geology,2012,33(1):118-128.