高石梯—磨溪地区灯影组多次波控制因素及预测方法

doi:10.12108/yxyqc.20200409

岩性油气藏 ›› 2020, Vol. 32 ›› Issue (4): 89–97.doi: 10.12108/yxyqc.20200409

高石梯—磨溪地区灯影组多次波控制因素及预测方法

戴晓峰¹, 谢占安¹, 杜本强², 张明¹, 唐廷科², 李军², 牟川²

1. 中国石油勘探开发研究院, 北京 100083;
2. 中国石油西南油气田分公司蜀南气矿, 四川泸州 646000

收稿日期:2019-07-22 修回日期:2019-08-30 出版日期:2020-08-01 发布日期:2020-06-16
第一作者:戴晓峰(1973-),男,硕士,高级工程师,主要从事油藏地球物理和地震综合解释方面的研究工作。地址:(100083)北京市海淀区学院路20号。Email:dawnpeak0101@163.com。
基金资助:
国家重点研发计划课题“深地资源勘查开采理论与技术集成”（编号：2018YFC0603706）、中国石油天然气集团有限公司科技项目“物探重大技术现场试验与集成配套”（编号：2017D-3503）联合资助

Controlling factors and prediction methods of multiples of Dengying Formation in Gaoshiti-Moxi area,Sichuan Basin

DAI Xiaofeng¹, XIE Zhan'an¹, DU Benqiang², ZHANG Ming¹, TANG Tingke², LI Jun², MOU Chuan²

1. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 10083, China;
2. Shu'nan Gas Mine, PetroChina Southwest Oil & Gas Field Company, Luzhou 646000, Sichuan, China

Received:2019-07-22 Revised:2019-08-30 Online:2020-08-01 Published:2020-06-16

摘要/Abstract

摘要： 高石梯-磨溪地区灯影组存在多次波干扰，降低了储层预测的精度，需要对地震资料中多次波进行识别和预测，以减小多次波干扰对井位部署的影响。针对现有多次波识别和预测方法的不足，通过求取速度谱能量团对应的叠加速度展度的方法识别多次波。利用该方法预测的灯影组多次波平面发育程度，和已钻井符合一致，证明了该方法的有效性。综合分析认为，灯影组多次波整体具有南强北弱的规律，同时具有较强的平面非均质性。地震正演和地震资料综合分析表明，奥陶系地层有残留的区域多次波更发育，向斜区多次波干扰更强。根据多次波干扰的程度，将高石梯-磨溪三维地震资料划分为3种类别：Ⅰ类多次波干扰弱、地震能真实地反映地层波阻抗特征；Ⅱ类一次波和多次波能量相当，地震多解性较强；Ⅲ类多次波干扰强，地震反射不能反映地层的真实特征。基于多次波平面预测结果，地质人员能够判别地震解释成果的可靠性，合理规避风险，在气藏的开发过程中减小多次波干扰的影响，降低井位部署的风险。

关键词: 多次波, 地震速度谱, 速度展度, 灯影组, 奥陶系, 四川盆地

Abstract: There are multiples interferences of Dengying Formation in Gaoshiti-Moxi area,which reduces the accuracy of seismic reservoir prediction. It is necessary to identify and predict multiples in seismic data, so as to reduce the influence of multiples interference on current well location deployment. In view of the shortcomings of the existing methods of multiples recognition and prediction,the multiples were identified by velocity spread of the energy clusters on the seismic velocity spectrum. The multiples prediction of Dengying Formation was realized in Gaoshiti-Moxi area. The result was consistent with drilled well data,which proves the effectiveness of the method. According to the comprehensive analysis,the multiples of Dengying Formation are strong in the south and weak in the north on the whole,and have strong horizontal heterogeneity. Through seismic forward modeling and comprehensive analysis of seismic data,the areas with residual Ordovician strata develop more multiples,and multiples interference is stronger in the syncline area. According to the degree of multiples interference,the 3D seismic data in Gaoshiti-Moxi area can be divided into three types. Type Ⅰ multiples interference is weak,and seismic amplitude can truly reflect impedance characteristics of the strata. Type Ⅱ multiples' energy is similar to primary wave,and seismic data has more multiple solution. Type Ⅲ multiples interference is strong,and seismic data cannot represent the characteristics of strata. Based on the multiples prediction results,geologists can judge the reliability of seismic interpretation results,reasonably avoid risks,reduce the influence of multiples interference,and reduce the risk of well location deployment.

Key words: multiples, seismic velocity spectrum, velocity spread, Dengying Formation, Ordovician, Sichuan Basin

中图分类号:

P631.4

戴晓峰, 谢占安, 杜本强, 张明, 唐廷科, 李军, 牟川. 高石梯—磨溪地区灯影组多次波控制因素及预测方法[J]. 岩性油气藏, 2020, 32(4): 89–97.

DAI Xiaofeng, XIE Zhan'an, DU Benqiang, ZHANG Ming, TANG Tingke, LI Jun, MOU Chuan. Controlling factors and prediction methods of multiples of Dengying Formation in Gaoshiti-Moxi area,Sichuan Basin[J]. Lithologic Reservoirs, 2020, 32(4): 89–97.

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高石梯—磨溪地区灯影组多次波控制因素及预测方法

Controlling factors and prediction methods of multiples of Dengying Formation in Gaoshiti-Moxi area,Sichuan Basin

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