精密枪控计时器设计及在海底数据采集中的应用
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摘要
为了获得海底地震仪(ocean bottom seismograph,OBS)在海洋地球物理勘探中更真实准确的数据处理剖面,必须消除导航、定位时间、定位精度对OBS数据采集和处理的影响。通过分析时间定位精度对OBS数据处理的影响及计时误差来源,开发了精密枪控计时器以提高时间定位精度和消除常规计时误差,计时精度达到0.01ms,实现了高精度导航定位、炮点定位、时间定位和计时,保证OBS地震数据采集的准确性和精度。经稳定性测试,生产试验后的数据分析表明,该设备时间精确、定位性能完全满足OBS多分量地震勘探要求并可应用于其他需要高精度计时的海洋地球物理勘探领域。
In order to obtain raw and accurate data processing section of ocean bottom seismograph(OBS) in marine geophysical exploration,negative effects of positional time and positional accuracy in acquisition and processing must be eliminated.Through analyzing the effects of the accuracy of positional time in OBS data processing and analyzing the timing error sources,we developed a gun controlling chronograph to improve positional precision and to eliminate conventional timing error;the accuracy can reach 0.01 ms,to realize high accuracy of navigation shotpoint time positioning and timing and to ensure the accuracy in OBS data acquisition.The results of stability testing and production testing show the time fixing capacity of chronograph can meet the demands of OBS multi-component acquisition perfectly,as well as in other marine geophysical prospecting areas that need high accuracy timing.
In order to obtain raw and accurate data processing section of ocean bottom seismograph(OBS) in marine geophysical exploration,negative effects of positional time and positional accuracy in acquisition and processing must be eliminated.Through analyzing the effects of the accuracy of positional time in OBS data processing and analyzing the timing error sources,we developed a gun controlling chronograph to improve positional precision and to eliminate conventional timing error;the accuracy can reach 0.01 ms,to realize high accuracy of navigation shotpoint time positioning and timing and to ensure the accuracy in OBS data acquisition.The results of stability testing and production testing show the time fixing capacity of chronograph can meet the demands of OBS multi-component acquisition perfectly,as well as in other marine geophysical prospecting areas that need high accuracy timing.
引文
[1]刘海波,全海燕,陈浩林,等.海上多波多分量地震采集综述[J].中国石油勘探,2007,03:52-57.
[2]吴志强,陈建文.OBS在我国海洋深部地质调查中的应用现状和前景[J].海洋地质动态,2008,09:35-42.
[3]郭建,刘光鼎.无缆存储式数字地震仪的现状及展望[J].地球物理学进展,2009,24(5):1540-1549.
[4]王伟巍.海底地震勘探最新方法与技术发展[J].科技计划成果,2010,06:7-11.
[5]FORSYTH D,DETRICK B.Ocean Mantle DynamicsScience Plan[R].Woods Hole Oceanographic Institution,2000:1-36.
[6]游庆瑜,刘福田,冉崇荣,等.高频微功耗海底地震仪研制[J].地球物理学进展,2003,18(1):173-176.
[7]丘学林,赵明辉,叶春明,等.南海东北部海陆联测与海底地震仪探测[J].大地构造与成矿学,2003,27(4):295-300.
[8]夏少红,丘学林,赵明辉,等,香港与珠三角地区海陆联合地震探测的数据处理[J].热带海洋学报,2007,26(1):35-38.
[9]胡家赋,刘宇明.导航定位后处理信息管理系统[J].海洋测绘,2003,23(5):28-30.
[10]YOSION,PAULLD,PHILLIPHR.et al.Large-offset seismicsurveying using ocean-bottom seismographs and air guns;Instrumentation and field technique[J]Geophysics,1987,52:1601-1611.
[11]王彦林,阎贫,郑红波,等.OBS记录的时间和定位误差校正[J].热带海洋学报,2007,26(5):40-46.
[2]吴志强,陈建文.OBS在我国海洋深部地质调查中的应用现状和前景[J].海洋地质动态,2008,09:35-42.
[3]郭建,刘光鼎.无缆存储式数字地震仪的现状及展望[J].地球物理学进展,2009,24(5):1540-1549.
[4]王伟巍.海底地震勘探最新方法与技术发展[J].科技计划成果,2010,06:7-11.
[5]FORSYTH D,DETRICK B.Ocean Mantle DynamicsScience Plan[R].Woods Hole Oceanographic Institution,2000:1-36.
[6]游庆瑜,刘福田,冉崇荣,等.高频微功耗海底地震仪研制[J].地球物理学进展,2003,18(1):173-176.
[7]丘学林,赵明辉,叶春明,等.南海东北部海陆联测与海底地震仪探测[J].大地构造与成矿学,2003,27(4):295-300.
[8]夏少红,丘学林,赵明辉,等,香港与珠三角地区海陆联合地震探测的数据处理[J].热带海洋学报,2007,26(1):35-38.
[9]胡家赋,刘宇明.导航定位后处理信息管理系统[J].海洋测绘,2003,23(5):28-30.
[10]YOSION,PAULLD,PHILLIPHR.et al.Large-offset seismicsurveying using ocean-bottom seismographs and air guns;Instrumentation and field technique[J]Geophysics,1987,52:1601-1611.
[11]王彦林,阎贫,郑红波,等.OBS记录的时间和定位误差校正[J].热带海洋学报,2007,26(5):40-46.
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