鄂南长7段致密油地震流体识别技术应用实践

doi:10.11743/ogg20180311

石油与天然气地质 ›› 2018, Vol. 39 ›› Issue (3): 541-548.doi: 10.11743/ogg20180311

鄂南长7段致密油地震流体识别技术应用实践

刘振峰^1,2,3, 张金强^1,2,3, 韩磊^1,2,3, 张广智⁴, 武丽^1,2,3, 刘春燕³

1. 页岩油气富集机理与有效开发国家重点实验室, 北京 100083;
2. 国家能源页岩油研发中心, 北京 100083;
3. 中国石化石油勘探开发研究院, 北京 100083;
4. 中国石油大学(华东) 地球科学与技术学院, 山东青岛 266580

收稿日期:2017-02-24 修回日期:2018-05-10 出版日期:2018-06-28 发布日期:2018-06-21
作者简介:刘振峰(1974-),男,高级工程师,石油物探。E-mail:liuzf.syky@sinopec.com。
基金资助:
国家科技重大专项（2016ZX05002-005-004）；中国石化科技部项目（P15087，P17020-4）。

Geophysical fluid recognition for tight oil in Chang 7 Member,south Ordos Basin

Liu Zhenfeng^1,2,3, Zhang Jinqiang^1,2,3, Han Lei^1,2,3, Zhang Guangzhi⁴, Wu Li^1,2,3, Liu Chunyan³

1. State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, China;
2. State Energy Center for Shale Oil Research and Development, Beijing 100083, China;
3. Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 100083, China;
4. School of Geosciences, China University of Petroleum(East China), Qingdao, Shandong 266580, China

Received:2017-02-24 Revised:2018-05-10 Online:2018-06-28 Published:2018-06-21

摘要/Abstract

摘要： 鄂南探区致密油储层地震流体识别存在两方面的困难：一是储层致密，岩石物理特征不清晰，缺少对含油性敏感的岩石物理参数；二是地震资料品质较差，不能很好地满足弹性参数反演的需要。为了克服这两方面的问题，在岩石物理建模、地震资料处理及反演中提出了相应的方法流程和解决办法。针对鄂南致密油储层岩矿组分复杂等特点，提出了致密油储层复杂孔隙结构各向异性岩石物理模型的构建方法，在岩石物理建模基础上通过岩石物理分析，查明拉梅系数/剪切模量对含油性较为敏感。针对鄂南低信噪比资料的客观情况，提出了多尺度综合静校正处理、振幅一致性处理、角道集处理、弹性参数同时反演等关键环节的解决办法，获取了较为可靠的弹性参数反演结果。结合岩石物理分析得到的敏感参数及弹性参数反演结果，对鄂南某探区长7段储层含油性进行了预测，预测结果与实钻井情况对应关系较好。实践应用表明，相关方法流程及针对性的解决办法切实可行，一定程度上解决了鄂南低信噪比地区致密油储层地震流体识别技术难题，取得了较好的应用效果。

关键词: 地震反演, 岩石物理, 流体识别, 致密油, 延长组, 鄂尔多斯盆地

Abstract: Fluid recognition in the south Ordos Basin using seismic data encounters two challenges:one is the tight reservoir,the physical properties of which are not clear,and thus the rock physical parameters that are sensitive to oil-bearing are unknown;the other is that the quality of seismic data is relatively poor,which can hardly satisfy the need of elastic parameter inversion.Hence,this study proposed methods and procedures that can overcome these challenges in rock physical modeling,seismic data processing and inversion.Regarding the complex mineralogy compositions of tight oil reservoirs in the South Ordos Basin,we proposed a way of constructing an anisotropic rock physical model.And on the basis of modeling and rock physical analysis,we identified that the ratio of Lame's coefficient and shear modulus are sensitive to oil-bearing in strata.Given the low signal-to-noise ratio in the south Ordos Basin,we introduced some solutions for certain key parts of data processing,including multi-scale static correction,amplitude consistency correction,angle gather correction,and simultaneous inversion of elastic parameters,and got reliable results for elastic parameter inversion.In combining the sensitivity parameters and results of elastic parameter inversion after rock physical analysis,we predicted the oil-bearing property of Chang 7 Member of certain exploration area in the south Ordos Basin,and the prediction matched well with the actual drilling results.The associated methods and region-specific solutions are efficient in practical application,and thus to certain extent,the technical difficulties in seismic fluid recognition for tight oil reservoirs in the South Ordos Basin with low signal-to-noise ratio are solved.

Key words: seismic inversion, rock physics, fluid recognition, tight oil, Yanchang Formation, Ordos Basin

中图分类号:

TE311

刘振峰,张金强,韩磊,等. 鄂南长7段致密油地震流体识别技术应用实践[J]. 石油与天然气地质, 2018, 39(3): 541-548. doi: 10.11743/ogg20180311 Liu Zhenfeng,Zhang Jinqiang,Han Lei,et al. Geophysical fluid recognition for tight oil in Chang 7 Member,south Ordos Basin[J]. Oil & Gas Geology, 2018, 39(3): 541-548. doi: 10.11743/ogg20180311

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鄂南长7段致密油地震流体识别技术应用实践

Geophysical fluid recognition for tight oil in Chang 7 Member,south Ordos Basin

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