自适应倾角导向技术在断层识别中的应用

发布时间：2018-04-03 21:04

本文选题：自适应倾角导向　切入点：中值滤波　出处：《岩性油气藏》2017年04期

【摘要】：在油气勘探开发过程中,断层和裂隙的分布形态一直是三维地震资料解释所关注的重要问题。地震资料中包含的随机噪音,往往影响断层的刻画精度,因此,解释过程中常采用去噪技术来消除噪音,提高断层刻画精度。常规去噪技术在提高地震资料信噪比的同时通常会破坏反射结构的边缘信息和断层的尖锐性,影响构造解释和油藏描述的准确性。为了解决结构保护去噪和断层检测难题,提出基于自适应倾角导向技术的断层识别方法,具体步骤如下:先生成包含采样点倾角和方位角信息的导向体;再将导向体作为滤波的输入数据进行导向滤波,提高信噪比的同时保留地层中的重要构造信息;最后将滤波后的数据体在倾角导向的控制下进行相似性属性提取,从而识别断层,提高断层解释精度。结果表明:在自适应倾角导向技术运用基础上,最终提取的相似性属性有效地突出了断层处的不连续性,去噪效果良好,有效增强了断层的识别能力。整体而言,自适应倾角导向技术是一种刻画断层和识别地质体边界的有效方法,目前已在复杂油气藏勘探中取得了较好的应用效果。
[Abstract]:In the process of oil and gas exploration and development, the distribution of faults and fissures has been an important problem in the interpretation of 3D seismic data.Random noise contained in seismic data often affects the accuracy of fault characterization. Therefore, denoising technique is often used to eliminate noise and improve the accuracy of fault characterization in the process of interpretation.The conventional denoising technique can not only improve the signal-to-noise ratio of seismic data, but also destroy the edge information of reflection structure and the acuity of fault, and affect the accuracy of structural interpretation and reservoir description.In order to solve the problems of structural protection de-noising and fault detection, a fault identification method based on adaptive dip guidance technology is proposed. The main steps are as follows: a guide body containing the information of sampling point inclination angle and azimuth angle is formed;Then the guide body is used as the input data of the filter to guide the filter to improve the signal-to-noise ratio while preserving the important structural information in the stratum. Finally, the filtered data body is extracted the similarity attribute under the control of the obliquity direction.In order to identify faults and improve the accuracy of fault interpretation.The results show that, on the basis of the application of adaptive inclination guidance technology, the extracted similarity attributes effectively highlight the discontinuity of faults, and the denoising effect is good, and the ability of fault recognition is effectively enhanced.As a whole, adaptive obliquity guidance technique is an effective method to depict faults and identify the boundaries of geological bodies, which has been applied to the exploration of complex oil and gas reservoirs.
【作者单位】：中国石油大学(华东)计算机与通信工程学院;
【基金】：国家重大科技专项“断块油田特高含水期提高水驱采收率技术”(编号:2011ZX0511-003)资助
【分类号】：P618.13;P631.4

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