龙门山山前带地震勘探进展及钻井跟踪评价
|
摘要
龙门山地区不仅地表地质条件复杂,地腹构造及其断裂体系也复杂多样,使构造地震成像困难。因此,近十几年开展了一系列地震勘探研究工作:首先通过在矿山梁、天井山等复杂构造区的二维地震勘探攻关,形成了基于地表条件的动态观测系统设计和宽线组合高覆盖采集技术,发现了一批潜伏构造,但是其构造复杂带的准确成像仍然存在问题;2007年,开始对三维勘探"禁区"的龙门山南段莲花山—张家坪地区开展三维地震勘探攻关,逐渐形成了有效的复杂山地三维地震采集、资料处理及解释的配套勘探技术,使山前带逆掩推覆构造成像问题取得了突破性进展;同时,加强钻井跟踪地震地质评价工作以提高钻探成功率。从而加速了龙门山山前带油气勘探开发的过程。
In the Longmenshan Mountains area of Sichuan Basin,structural seismic imaging is difficult because of complex surface geological condition,subsurface structure and faulting system.In the past decade,many researches on seismic exploration are implemented,including(1) a 2D-seismic exploration for some complex structural areas of Kuangshanliang and Tianjingshan to form both design of dynamic observation system and wideline-combination high-covering acquisition technology based on surface condition,resulting in discovering some burial structures;(2) a 3D-seismic exploration in 2007 for Lianhuashan-Zhangjiaping area in southern Longmenshan Mountains,a forbidden area before,to form some effective technologies for complex mountains,such as 3D seismic acquisition,data processing and interpretation,and to make a breakthrough in structural imaging of overthrust nappe;(4) improving drilling trace and seismic evaluation to increase a success ratio of drilling.These advances accelerate the exploration and development of foothill belt in Longmenshan Mountains.
In the Longmenshan Mountains area of Sichuan Basin,structural seismic imaging is difficult because of complex surface geological condition,subsurface structure and faulting system.In the past decade,many researches on seismic exploration are implemented,including(1) a 2D-seismic exploration for some complex structural areas of Kuangshanliang and Tianjingshan to form both design of dynamic observation system and wideline-combination high-covering acquisition technology based on surface condition,resulting in discovering some burial structures;(2) a 3D-seismic exploration in 2007 for Lianhuashan-Zhangjiaping area in southern Longmenshan Mountains,a forbidden area before,to form some effective technologies for complex mountains,such as 3D seismic acquisition,data processing and interpretation,and to make a breakthrough in structural imaging of overthrust nappe;(4) improving drilling trace and seismic evaluation to increase a success ratio of drilling.These advances accelerate the exploration and development of foothill belt in Longmenshan Mountains.
引文
1罗志立.龙门山造山带的崛起和四川盆地的形成与演化[M].成都:成都科技大学出版社,1994.
2刘树根.龙门山冲断带与川西前陆盆地的形成演化[M].成都:成都科技大学出版社,1993.
3肖富森,李政文,张华军,等.龙门山构造带北段地震、地质综合解释[J].天然气工业,2005,(05):37-39.
4戴勇,李正文,张华军,等.川西南部地区上三叠统构造及断裂特征[J].天然气工业,2006,26(1):43-45.
5张华军,王海兰,肖富森,等.基于反射层的变层速度模型时深转换方法[J].天然气工业,2003,23(1).
6朱志澄.逆冲推覆构造(第二版)[M].北京:中国地质大学出版社,1991.
2刘树根.龙门山冲断带与川西前陆盆地的形成演化[M].成都:成都科技大学出版社,1993.
3肖富森,李政文,张华军,等.龙门山构造带北段地震、地质综合解释[J].天然气工业,2005,(05):37-39.
4戴勇,李正文,张华军,等.川西南部地区上三叠统构造及断裂特征[J].天然气工业,2006,26(1):43-45.
5张华军,王海兰,肖富森,等.基于反射层的变层速度模型时深转换方法[J].天然气工业,2003,23(1).
6朱志澄.逆冲推覆构造(第二版)[M].北京:中国地质大学出版社,1991.
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