双复杂地区地震勘探技术及应用效果
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摘要
针对复杂地表条件和复杂地质构造双复杂地区勘探难点,在野外采集中,采用面向目标的野外施工方法,通过观测系统优化,精细表层调查改进采集效果。在处理中,通过层析反演近地表校正、组合去噪、叠前偏移等技术提高成像质量。通过精细构造解释及变速成图,准确反映地下构造形态。通过采集、处理、解释的联合攻关,在双复杂地区取得了良好的勘探效果。
In recent years,the focus of oil and gas exploration was turned to the dual-complex areas with irregular topography and complex geologic structures.In this area,shooting and reception conditions were very poor,the static correction problem of the raw data was serious and S/N was low.At the same time,many factors constrained the exploration effect of these areas,such as the complex underground structure,the intensive changes of velocity field and the image problems.In order to solve these difficulties,during the acquisition,goal-oriented field of construction methods were used to observe the system optimization and accurate surface survey to improve shooting effect.During the processing,tomography inversion was used for near surface correction and de-noising by array and pre-stack migration to improve imaging quality.During the interpretation,the accurate structure interpretation and variable velocity mapping is used to reflect the complex underground structure.By the combination of acquisition,processing and interpretation,good effect is achieved in the dual-complexity area.
In recent years,the focus of oil and gas exploration was turned to the dual-complex areas with irregular topography and complex geologic structures.In this area,shooting and reception conditions were very poor,the static correction problem of the raw data was serious and S/N was low.At the same time,many factors constrained the exploration effect of these areas,such as the complex underground structure,the intensive changes of velocity field and the image problems.In order to solve these difficulties,during the acquisition,goal-oriented field of construction methods were used to observe the system optimization and accurate surface survey to improve shooting effect.During the processing,tomography inversion was used for near surface correction and de-noising by array and pre-stack migration to improve imaging quality.During the interpretation,the accurate structure interpretation and variable velocity mapping is used to reflect the complex underground structure.By the combination of acquisition,processing and interpretation,good effect is achieved in the dual-complexity area.
引文
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[2]赵殿栋,郭建,王咸彬,等.基于模型面向目标的观测系统优化设计技术[J].中国西部油气地质,2006,2(2):119～122.
[3]杨贵祥,郑天发,敬朋贵,等.川东北地区山地高精度地震勘探技术[J].石油与天然气地质,2006,27(6):871～878.
[4]张继国,刘连升.复杂区初至层析反演静校正[J].石油地球物理勘探,2006,41(4):383～385,395.
[5]杨文采,李幼铭.应用地震层析成像[M].北京:地质出版社,1993.11～46.
[6]李庆忠.走向精确勘探的道路[M].北京:石油工业出版社,1994.56～72.
[7]胡天跃,王润秋,White R.地震资料处理中的聚束滤波方法[J].地球物理学报,2000,43(1):105～115.
[8]熊翥.复杂地区地震数据处理思路[M].北京:石油工业出版社,2002.31～35.
[9]刘光鼎,张丽莉,祝靓谊.试论复杂地质体的油气地震勘探[J].地球物理学进展,2006,21(3):683～686.
[10]何际平,鲁烈琴,王红旗,等.复杂地区速度场建立与变速构造成图方法研究[J].地球物理学进展,2006,21(1):167～172.
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