曲率属性在河流相储层内部不连续性检测中的应用

doi:10.11720/wtyht.2021.1079

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摘要

河流相砂岩储层内部由于岩性、物性和微小构造变化导致的不连续性特征是阻隔流体流动,影响注采受效的重要因素。因此对这些特征的研究对于油田开发具有重要意义。这类不连续特征在地震资料上通常表现为地震振幅和波形的变化、同相轴的扭曲等,尺度通常小于地震资料分辨率。本文研究了基于曲率算法的储层不连续性特征的识别方法,通过模型正演分析发现曲率属性对于砂体之间不连续性特征具有较高的检测精度。在渤海某油田砂体单元的应用分析表明,曲率属性对于储层不连续性的检测结果与后期生产动态及示踪剂测试结果吻合,验证了该方法的可靠性。该方法技术能够为油田高效开发提供有力的技术支撑。

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	张晶玉
	范廷恩
	王海峰
	张显文
	杜昕

关键词 ：曲率属性, 河流相储层, 储层不连续性, 油田开发

Abstract：

The discontinuity characteristic of fluvial facies sandstone reservoir due to lithology,physical property and micro-structural changes is an important factor that hinders fluid flow and affects the efficiency of injection and production.Therefore,the study of these discontinuity characteristics is of great significance for oilfield development.Such discontinuous features usually appear as seismic amplitude and waveform changes,distortion of seismic phase axis,et al.Since the scale of discontinuous features is usually smaller than the resolution of seismic data,it is difficult to accurately identify them by conventional methods.Model forward analysis found that curvature attributes have high detection accuracy for sand body discontinuity.The application of reservoir unit in an oilfield in Bohai shows that the reservoir discontinuity detection results with curvature attributes are consistent with tracer test results of the later production dynamics,which verifies the reliability of the method and provides a powerful support for the efficient development of the oilfield.

Key words： curvature attributes fluvial facies reservoir reservoir discontinuity oilfield development

收稿日期: 2020-02-21 修回日期: 2020-11-12 出版日期: 2021-04-20

ZTFLH:

P631

作者简介: 张晶玉(1987-),女,2013年毕业于中国石油大学(北京)地球探测与信息技术专业,现主要从事油藏地球物理研究工作。Email: zhangjy53@cnooc.com.cn

引用本文:

张晶玉, 范廷恩, 王海峰, 张显文, 杜昕. 曲率属性在河流相储层内部不连续性检测中的应用[J]. 物探与化探, 2021, 45(2): 450-457.
ZHANG Jing-Yu, FAN Ting-En, WANG Hai-Feng, ZHANG Xian-Wen, DU Xin. Application of curvature attributes to fluvial reservoirs discontinuity detection. Geophysical and Geochemical Exploration, 2021, 45(2): 450-457.

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https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2021.1079 或 https://www.wutanyuhuatan.com/CN/Y2021/V45/I2/450

Fig.1 曲率属性的地质含义

Fig.2 砂体正演模型

Fig.3 模型正演地震剖面

Fig.4 模型数据测试效果
a—砂体正演模型;b—总负振幅平面属性

Fig.5 多河道复杂三维模型
a—平面位置投影;b—纵向叠置关系

Fig.6 均方根振幅属性

Fig.7 利用曲率数据体计算的总振幅属性

Fig.8 Q油田明下段油藏剖面

Fig.9 实际数据的地震剖面与曲率属性剖面对比

Fig.10 目标砂体的曲率平面属性

Fig.11 储层不连续性检测结果与生产动态对应关系

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