二维地震勘查设计及预算问题的讨论
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摘要
从分析二维地震勘查工程布置和观测系统设计的概念入手,指出了一般设计及管理人员在"地震测线"、"地震满覆盖次数剖面"和"地震激发炮线"三个概念中存在的思维误区,以及由此导致的工程布置和工程量统计等方面存在的问题,提出了在二维地震勘查设计中控制满足满覆盖次数剖面应考虑的因素与计算公式:在明确勘查范围的情况下,一要考虑目的层倾角,地层倾角越大,镶边越大,激发炮点也就随之增加;二要考虑勘查区块形状,与地层倾向垂直的狭长区块同样也会大量增加激发炮点;进而讨论了工程预算应注意的问题,指出多接收道既可大幅减少激发炮点,又可为提高覆盖次数提供技术保障。
Start from the apprehending of 2D seismic prospecting engineering layout and field setup design concepts,pointed out the thinking traps in the three concepts of the "seismic traverse","seismic full fold profile" and "seismic shot source line" among the design and managerial personnel,analyzed resulting issues in engineering layout and work load statistics,put forward factors and computational formula should be considered to satisfy fold profile controlling.Under the unambiguous exploration extent condition,firstly should consider the target dip angle,the large the dip angle,the larger the edge,the number of shotpoint will be increased along with;secondly should consider the shape of exploration block,a long and narrow block perpendicular to strata dip,the number of shotpoint will be increased greatly in the same way.Then discussed issues should pay attention to in the engineering budgeting,pointed that the multiple receiving channels can not only reduce number of shotpoint greatly,but also provide technical support to improve coverage.
Start from the apprehending of 2D seismic prospecting engineering layout and field setup design concepts,pointed out the thinking traps in the three concepts of the "seismic traverse","seismic full fold profile" and "seismic shot source line" among the design and managerial personnel,analyzed resulting issues in engineering layout and work load statistics,put forward factors and computational formula should be considered to satisfy fold profile controlling.Under the unambiguous exploration extent condition,firstly should consider the target dip angle,the large the dip angle,the larger the edge,the number of shotpoint will be increased along with;secondly should consider the shape of exploration block,a long and narrow block perpendicular to strata dip,the number of shotpoint will be increased greatly in the same way.Then discussed issues should pay attention to in the engineering budgeting,pointed that the multiple receiving channels can not only reduce number of shotpoint greatly,but also provide technical support to improve coverage.
引文
[1]常锁亮,唐永洪,陈强,等.煤田三维地震勘探的观测系统设计现状与讨论[J].中国煤炭地质,2008,20(09).
[2]张彦湘,罗振丽,张友林,等.地震勘探在多种地震地质条件共存区域内的应用——以山西同煤集团马道头井田二维、三维地震勘探为例[J].中国煤炭地质,2009,21(S2).
[3]王永奎,殷全增.甘肃省陇东地区黄土塬地区煤田地震勘探技术方法探索[J].中国煤炭地质,2010,22(08).
[4]李建国,孙少伟,徐发,等.诺门罕盆地找煤工作中二维地震技术应用[J].中国煤炭地质,2012,24(09).
[5]任日春,金秀芹,杨忠习,等.一种快速确定二维地震勘探最佳施工因素的方法[J].吉林地质,2009,(01).
[2]张彦湘,罗振丽,张友林,等.地震勘探在多种地震地质条件共存区域内的应用——以山西同煤集团马道头井田二维、三维地震勘探为例[J].中国煤炭地质,2009,21(S2).
[3]王永奎,殷全增.甘肃省陇东地区黄土塬地区煤田地震勘探技术方法探索[J].中国煤炭地质,2010,22(08).
[4]李建国,孙少伟,徐发,等.诺门罕盆地找煤工作中二维地震技术应用[J].中国煤炭地质,2012,24(09).
[5]任日春,金秀芹,杨忠习,等.一种快速确定二维地震勘探最佳施工因素的方法[J].吉林地质,2009,(01).
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