渝贵地区海相页岩气地震勘探采集技术研究
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摘要
我国重庆、贵州地区海相页岩气区域是页岩气勘探的重点与难点区域,地震地质条件复杂,获取高品质的地震资料难度极大。贵州某页岩气区块属典型的南方海相页岩气区域,喀斯特地貌十分发育。区内植被茂密,地形变化大,地质条件复杂多变,地震勘探施工极难。从已知区域地质资料入手,建立地质模型,通过理论分析、波场模拟、正演模拟同时结合充分的试验工作来确定最终施工参数,选取了适合本区的最佳激发参数、接收参数以及适合本区主要目的层的观测系统。实践表明,该区选择的生产参数较好克服了南方海相页岩气区域地震勘探数据信噪比低、品质一般的问题,对于南方海相页岩气地震勘探工作具有较强的借鉴意义。
The marine shale gas area of south China is the key and difficult area for shale gas exploration.The complicated seismic geological conditions make it very difficult to obtain high quality seismic data.A shale gas zone in Guizhou province is a typical southern marine shale gas area where the karst landform is well developed.The dense vegetation and rugged topography as well as the complicated and changeable geological condition bring a lot of difficulties to the seismic exploration in this area.In order to determine the suitable working parameters,geological models were firstly built based on the geological data of the known area,and then the final construction parameters were determined based on theoretical analysis,wave simulation and forward modeling combined with sufficient experimental work.The optimal exciting parameter,the receiving parameter and the observing system suitable for the main target layer in this area were selected.The results showed that the selectedworking parameters are able to overcome the problem of low S/N ratio and quality of seismic data in this marine shale gas area of south China,which has strong reference significance for the seismic exploration work in this area.
The marine shale gas area of south China is the key and difficult area for shale gas exploration.The complicated seismic geological conditions make it very difficult to obtain high quality seismic data.A shale gas zone in Guizhou province is a typical southern marine shale gas area where the karst landform is well developed.The dense vegetation and rugged topography as well as the complicated and changeable geological condition bring a lot of difficulties to the seismic exploration in this area.In order to determine the suitable working parameters,geological models were firstly built based on the geological data of the known area,and then the final construction parameters were determined based on theoretical analysis,wave simulation and forward modeling combined with sufficient experimental work.The optimal exciting parameter,the receiving parameter and the observing system suitable for the main target layer in this area were selected.The results showed that the selectedworking parameters are able to overcome the problem of low S/N ratio and quality of seismic data in this marine shale gas area of south China,which has strong reference significance for the seismic exploration work in this area.
引文
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[4]昌书林,秦启荣,周毅.地球物理技术在页岩气勘探过程中的应用研究[J].重庆科技学院学报(自然科学版),2012,14(4):10-12.
[5]刘伟,何振华,李可恩,等.地球物理技术在页岩气勘探开发中的应用和前景[J].煤田地质与勘探,2013,41(6):68-73.
[6]谢治国,王巧丽,曾祥亮,等.重庆酉阳页岩二维地震勘探研究[J].长江大学学报(自然科学版),2012,9(8):21-24.
[7]徐永清.页岩气地震勘探数据采集参数选择的研究[J].中国煤炭地质,2014,26(7):63-68.
[8]曾维望,常锁亮.湘西碳酸岩山区页岩气地震勘探采集技术研究[J].中国煤炭地质,2015,27(1):66-71,76.
[9]唐新功,胡文宝,苏朱刘,等.我国南方地区页岩气电磁勘探技术初探[J].长江大学学报(自然科学版),2011,8(11):33-34.
[10]蒙应华,汪玉琼,杨世欲.AMT法与TEM法在黔南页岩气勘查中的综合应用[J].工程地球物理学报,2015,12(5):627-632.
[11]郭建敏,李鹏.复杂山地煤矿采区三维地震勘探采集方法研究[J].工程地球物理学报,2017,14(3):326-332.
[12]林建东,任森林,薛明喜,等.页岩气地震识别与预测技术[J].中国煤田地质,2012,24(8):56-60.
[13]李京涛,张茗,邢磊.三维地震勘探采集参数设计——以沁水盆地南部长平井田为例[J].工程地球物理学报,2018,15(2):227-235.
[14]李永铭,谭天元,黄易.地震勘探技术在碎裂结构岩体探测中的应用研究[J].工程地球物理学报,2015,12(4):508-513.
[15]张晨林.博格达山山前断褶带山地地震采集方法及效果[J].工程地球物理学报,2014,11(4):462-466.