应用地震波形分析技术预测裂缝的方法探讨
|
摘要
探讨了利用地震道波形变化特征识别和预测裂缝的方法。介绍了该方法的基本原理和实现过程,首先从 过井地震剖面出发,通过井-震标定,建立裂缝的地震响应模式,总结裂缝发育层段(时窗段)的特征波形;然后 利用神经网络技术逐道进行目的层段的实际地震道对比,把地震波形状分类成离散的"裂缝信息",再根据拟合 度准则进行分类,最终得到裂缝地震反射异常体的空间展布。在青西油田利用地震波形分析技术进行了裂缝预 测,并根据预测结果部署了5口井,钻探结果与预测结果相吻合,位于裂缝发育区的Q11井获得了高产油流。
Seismic waveform analysis can depict lateral variation of seismic signal in detail by contrast to real seismic trace one by one in a layer phase according to waveform feature of seismic trace, in order to get spatial distribution of abnormal seismic reflection. On basis of qualitative identification of fracture and seismic trace analysis using nerve network of seismic trace waveform identification, we can classify the shape of seismic trace signal into discrete fracture information. Then we may calibrate object by integrating drilling core and the explanation results of well fracture, confirm the fracture type and its spatial distribution. The foundation, identification fracture theory and realization process by seismic waveform analysis technology, and an actual example of Qingxi oilfield in Jiuquan basin are presented systematically. Seismic waveform analysis is a good means to predict complicated lithological fracture reservoir.
Seismic waveform analysis can depict lateral variation of seismic signal in detail by contrast to real seismic trace one by one in a layer phase according to waveform feature of seismic trace, in order to get spatial distribution of abnormal seismic reflection. On basis of qualitative identification of fracture and seismic trace analysis using nerve network of seismic trace waveform identification, we can classify the shape of seismic trace signal into discrete fracture information. Then we may calibrate object by integrating drilling core and the explanation results of well fracture, confirm the fracture type and its spatial distribution. The foundation, identification fracture theory and realization process by seismic waveform analysis technology, and an actual example of Qingxi oilfield in Jiuquan basin are presented systematically. Seismic waveform analysis is a good means to predict complicated lithological fracture reservoir.
引文
1师永民,霍进,张玉广.陆相油田开发中后期油藏精细描 述[M].北京:石油工业出版社,2004.84～87
2甘其刚,杨振武,彭大钧.振幅随方位角变化裂缝检测技 术及其应用[J].石油物探,2004,43(4):373～376
3师永民.高分辨率砂泥岩薄互层储层综合预测技术[J]. 石油地球物理勘探,2000,35(5):661～668
4朱成宏.裂缝预测技术在松南工区应用效果分析[J].石 油物探,2001,40(4):62～68
5苏朝光.相干分析技术在泥岩裂缝油气藏预测中的应用 [J].石油物探,2002,41(2):197～201
6赵力民,郎晓玲,金凤鸣,等.波形分类技术在隐蔽油藏 预测中的应用[J].石油勘探与开发,2001,28(6):53～ 55
7鲁新便,王士敏.应用变尺度分形技术研究缝洞型碳酸 盐岩储层的非均质性[J].石油物探,2003,42(3):309～ 312
8王兴建,曹俊兴,李学民,等.基于分形理论的地震裂缝 检测方法[J].石油物探,2003,42(2):191～195
2甘其刚,杨振武,彭大钧.振幅随方位角变化裂缝检测技 术及其应用[J].石油物探,2004,43(4):373～376
3师永民.高分辨率砂泥岩薄互层储层综合预测技术[J]. 石油地球物理勘探,2000,35(5):661～668
4朱成宏.裂缝预测技术在松南工区应用效果分析[J].石 油物探,2001,40(4):62～68
5苏朝光.相干分析技术在泥岩裂缝油气藏预测中的应用 [J].石油物探,2002,41(2):197～201
6赵力民,郎晓玲,金凤鸣,等.波形分类技术在隐蔽油藏 预测中的应用[J].石油勘探与开发,2001,28(6):53～ 55
7鲁新便,王士敏.应用变尺度分形技术研究缝洞型碳酸 盐岩储层的非均质性[J].石油物探,2003,42(3):309～ 312
8王兴建,曹俊兴,李学民,等.基于分形理论的地震裂缝 检测方法[J].石油物探,2003,42(2):191～195
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心