| 致密低渗透砂岩储层多尺度天然裂缝表征方法 |
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| 引用本文： | 吕文雅,曾联波,陈双全,吕鹏,董少群,惠晨,李睿琦,王浩南.致密低渗透砂岩储层多尺度天然裂缝表征方法[J].地质论评,2021,67(1):67020023-67020023. |
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| 作者姓名： | 吕文雅 曾联波 陈双全 吕鹏 董少群 惠晨 李睿琦 王浩南 |
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| 作者单位： | 1)中国石油大学（北京）油气资源与探测国家重点实验室，北京，102249；2)中国石油大学（北京）地球科学学院，北京，102249;1)中国石油大学（北京）油气资源与探测国家重点实验室，北京，102249；3)中国石油大学（北京）地球物理学院，北京，102249;2)中国石油大学（北京） 地球科学学院，北京，102249；4)中国石化上海海洋油气分公司勘探开发研究院，上海，200120;1)中国石油大学（北京）油气资源与探测国家重点实验室，北京，102249；2)中国石油大学（北京）地球科学学院，北京，102249；5)中国石油大学（北京）理学院，北京，102249 |
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| 基金项目： | 本文为国家科技重大专项（编号：2017ZX05049006-001）、国家自然科学基金资助项目（编号：42002135）、中石油战略合作科技专项（编号：ZLZX2020-02-02）和中国石油大学（北京）青年拔尖人才科研启动基金项目（编号：2462017YJRC057）的成果。 |
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| 摘 要： | 本文利用地表露头、岩芯、测井、三维地震和微观分析资料，根据多尺度裂缝的发育特征及不同资料的精度，探讨了多尺度裂缝的表征方法。致密低渗透砂岩储层发育多尺度天然裂缝，根据天然裂缝规模以及限制天然裂缝扩展延伸的岩石力学层界面，将天然裂缝分为大尺度裂缝、中尺度裂缝、小尺度裂缝和微尺度裂缝4级，不同尺度裂缝的发育特征存在较大差异。其中大尺度裂缝主要应用三维地震资料的叠后属性进行检测和表征；中小尺度裂缝在单井上可以应用岩芯、成像测井和常规测井相结合的方法进行表征，在平面上采用基于地质和测井约束的三维地震叠前各向异性分析以及储层地质力学相结合的方法进行综合预测和评价；微尺度裂缝一般应用铸体薄片、普通薄片、扫描电镜和三维CT扫描等微观分析方法进行观察描述，通过主控因素约束的方法进行预测。利用本文提出的多尺度裂缝表征方法实现了对鄂尔多斯盆地西南部致密砂岩储层多尺度裂缝表征，可为其它致密低渗透砂岩储层多尺度裂缝表征提供借鉴。
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| 关 键 词： | 天然裂缝 多尺度裂缝 表征方法 发育特征 致密低渗透砂岩储层 |
| 收稿时间： | 2020/8/9 0:00:00 |
| 修稿时间： | 2021/1/4 0:00:00 |
Characterization methods of multi-scale natural fractures in tight and low-permeability sandstone reservoirs |
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| LYU Weny,ZENG Lianbo,CHEN Shuangquan,LV Peng,DONG Shaoqun,HUI Chen,LI Ruiqi,WANG Haonan.Characterization methods of multi-scale natural fractures in tight and low-permeability sandstone reservoirs[J].Geological Review,2021,67(1):67020023-67020023. |
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| Authors: | LYU Weny ZENG Lianbo CHEN Shuangquan LV Peng DONG Shaoqun HUI Chen LI Ruiqi WANG Haonan |
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| Institution: | 1)State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum,Beijing,102249;2)College of Geosciences,China University of Petroleum, Beijing,102249;1)State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum,Beijing,102249;3)College of Geophysics,China University of Petroleum, Beijing,102249;2)College of Geosciences,China University of Petroleum,Beijing,102249;4)Exploration and Development Research Institute of Sinopec Shanghai Offshore Oil & Gas Company,Shanghai,200120;1)State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum,Beijing,102249;2)College of Geosciences,China University of Petroleum, Beijing,102249;5)College of Sciences,China University of Petroleum,Beijing,102249 |
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| Abstract: | Multi-scale fractures are developed in tight and low-permeability sandstone reservoirs,and this paper discussed the characterization methods of multi-scale natural fractures in tight and low-permeability sandstone reservoirs.Methods:According to natural fractures sizes and mechanical stratigraphy interfaces,which constrain natural fracture propagation,natural fractures are divided into four scales.According to outcrops,cores,well logs,three dimensional (3D) seismic data and micro- analysis data,the characterization methods of multi-scale natural fractures were studied based on the characteristics of multi-scale natural fractures and the accuracy of different data.Finally,the multi-scale fracture characterization methods proposed in this paper were used to characterize the multi-scale fractures in the tight sandstone reservoirs in the southwestern Ordos Basin to test the methods.Results: Natural fractures are divided into micro-scale,small-scale,meso-scale and macro-scale ones in tight and low-permeability sandstone reservoirs.The fractures at different scales show different characteristics.Macro- scale fractures are mainly characterized by post-stack attributes of 3D seismic data.Meso-scale and small-scale fractures can be described in single wells by combining cores,image logs and conventional logs,and they can be comprehensively predicted and evaluated by pre-stack anisotropy of 3D seismic data and reservoir geomechanics method in combination with cores,image logs and conventional logs.Micro-scale fractures are generally characterized by micro-scale analysis method,such as thin sections, scanning electron microscope,computerized tomography (CT) scanning etc.And micro-scale fractures can be predicted under the control of the controlling factors of micro-scale fractures.Conclusions:The multi-scale fracture characterization methods proposed in this paper can provide reference for the characterization of the multi-scale fractures in other tight and low-permeability sandstone reservoirs. |
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| Keywords: | natural fracture multi-scale fracture characterization method development characteristics tight and low-permeability sandstone reservoir |
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