3-D seismic velocity field building technology:a case study of southern Hejian area of Raoyang sag

doi:10.7623/syxb201507006

Acta Petrolei Sinica ›› 2015, Vol. 36 ›› Issue (7): 820-826.DOI: 10.7623/syxb201507006

• Petroleum Exploration • Previous Articles Next Articles

3-D seismic velocity field building technology:a case study of southern Hejian area of Raoyang sag

Yi Yuanyuan^1,2, Ye Hui¹, Deng Aiju³, Huang Zhijia³, Li Qirui³, Tian Jianzhang⁴

1. Key Laboratory of Exploration Technology for Oil and Gas Resources of Ministry of Education, Yangtze University, Hubei Wuhan 430100, China;
2. College of Geophysics and Oil Resources, Yangtze University, Hubei Wuhan 430100, China;
3. No.3 Oil Production Plant, PetroChina Huabei Oilfield Company, Hebei Hejian 062450, China;
4. Geophysical Exploration Research Institute, PetroChina Huabei Oilfield Company, Hebei Renqiu 062552, China

Received:2015-01-25 Revised:2015-05-17 Online:2015-07-25 Published:2015-08-06

三维地震速度场建立技术——以饶阳凹陷河间南地区为例

易远元^1,2, 叶辉¹, 邓爱居³, 黄志佳³, 李其瑞³, 田建章⁴

1. 长江大学油气资源与勘探技术教育部重点实验室湖北武汉 430100;
2. 长江大学地球物理与石油资源学院湖北武汉 430100;
3. 中国石油华北油田公司第三采油厂河北河间 062450;
4. 中国石油华北油田公司地球物理勘探研究院河北任丘 062552

作者简介:易远元,男,1964年3月生,1983年获江汉石油学院石油物探专业学士学位;2007年获中国地质大学(武汉)地球探测与信息技术专业博士学位,现为长江大学地球物理与石油资源学院副教授,主要从事地震勘探教学与研究工作。Email:yuanyuanyi@163.com
基金资助:
中国石油天然气股份有限公司重大专项(2014E-35-02)资助。

Abstract

Abstract:

Influenced by tectonic movements in different periods, a variety of special geological bodies exist in complex structure area, as well as a large number of low-amplitude structures with velocity changing greatly in both vertical and horizontal directions. The seismic stack velocity used in traditional Dix formula varying-velocity mapping method is neither accurate nor suitable for velocity transformation of high steep-dip strata. Moreover, the structural map has low accuracy. Model chromatography varying-velocity spatial correction mapping method can be used to calculate the velocity of high steep structure, and is able to eliminate the influences of complex surface structures, large dip angles of subsurface strata, large horizontal and vertical variations in interval velocity and other factors on structure morphology and structural highs. However, this method is only applicable to establish the initial velocity model based on interpretation data. When the interpreted horizons fail to describe the structural variation characteristics of the whole area, the initial model will have poor effect, leading to errors in velocity calculation. Therefore, the structural mapping of the entire area cannot be completed using single method. Aiming at special geological conditions of southern Hejian area in Ragyang sag, the Dix formula method and model chromatography are used for partition velocity field in varying-velocity mapping, which can solve this problem well. It is indicated by actual data applications that this method is able to improve the establishment of velocity field and accuracy of varying-velocity mapping.

Key words: 3-D seismic velocity field, complex structural area, model chromatography, Dix formula, partition velocity field, high steep structure, structural highs

摘要：

在复杂构造地区,由于受不同时期构造运动的影响,不仅存在各种各样的特殊地质体,还存在大量低幅度构造,其速度在纵向和横向上变化也很大。用传统的Dix公式变速成图方法所用的地震叠加速度不准确,不适合于高陡倾角地层的速度转换,构造图的精度也较低。模型层析法变速空校成图方法是一种解决高陡构造速度计算的方法,其能够消除地表结构复杂、地下地层倾角大、层速度纵横变化大等因素对构造形态及构造高点的影响,但是这种方法是基于解释数据来建立初始速度模型的,解释层位不足以描述全区构造变化特征时,建立初始模型的效果较差,会造成速度运算错误。因此,单一使用一种方法无法较好解决全区构造成图问题。针对饶阳凹陷河间南地区地质条件特殊的情况,采用Dix公式法和模型层析法分区建立速度场变速成图很好地解决了这一难题。实际资料应用表明,该方法提高了速度场建立和变速成图精度。

关键词: 三维地震速度场, 复杂构造区, 模型层析法, Dix公式法, 分区建立速度场, 高陡构造, 构造高点

CLC Number:

P631.4

Yi Yuanyuan, Ye Hui, Deng Aiju, Huang Zhijia, Li Qirui, Tian Jianzhang. 3-D seismic velocity field building technology:a case study of southern Hejian area of Raoyang sag[J]. Acta Petrolei Sinica, 2015, 36(7): 820-826.

易远元, 叶辉, 邓爱居, 黄志佳, 李其瑞, 田建章. 三维地震速度场建立技术——以饶阳凹陷河间南地区为例[J]. 石油学报, 2015, 36(7): 820-826.

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3-D seismic velocity field building technology:a case study of southern Hejian area of Raoyang sag

三维地震速度场建立技术——以饶阳凹陷河间南地区为例

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