High-quality seismic geometry is the key to obtain high-quality seismic data, and can affect the accuracy of data processing and imaging. Based on the analysis of the relationship between the quality of the geometry a...High-quality seismic geometry is the key to obtain high-quality seismic data, and can affect the accuracy of data processing and imaging. Based on the analysis of the relationship between the quality of the geometry and the four acquisition parameters(the number of traces, shot line spacing, and the space and number of receiver lines), a quality evaluation method of the geometry based on comprehensive quality factor(CQF) is proposed, and the relationship between the geometry quality and the four parameters is given. We use field data collected in an oil field in Western China with complex geology: First we use a wide azimuth geometry. Then, we calculate the relationship curve between geometry and data quality by varying each parameter while keeping the rest fixed. and the analysis results are given by using the CQF evaluation method. The results show that the shot-line spacing has the greatest effect on the quality of the geometry, and the increase of the receiver line spacing can appropriately improve the quality of the geometry, and the increase of the number of receiving traces can improve the geometry quality. The different acquisition parameters have different effects on the imaging quality of shallow and deep events. The model forward and prestack depth migration are used to generate prestack depth migration profiles with different acquisition parameters. The imaging results are consistent with the above calculated results. According to the depth of the target layer, the quality factor evaluation method is applied to guide the design of the geometry and optimize the acquisition parameters to improve the imaging accuracy of seismic data.展开更多
目的了解2015-2017年广东省江门地区白纹伊蚊季节消长规律及抗药性水平,为白纹伊蚊防制提供科学依据。方法采用布雷图指数(BI)法和诱蚊诱卵器法,于2015-2017年在江门市的7个市(区)的城市居民区逐月开展白纹伊蚊种群密度监测;采用WHO推...目的了解2015-2017年广东省江门地区白纹伊蚊季节消长规律及抗药性水平,为白纹伊蚊防制提供科学依据。方法采用布雷图指数(BI)法和诱蚊诱卵器法,于2015-2017年在江门市的7个市(区)的城市居民区逐月开展白纹伊蚊种群密度监测;采用WHO推荐的幼虫浸渍法开展幼虫抗药性测定。用SPSS 19.0软件进行生物测定数据统计,获得半数致死浓度(LC_(50)),根据抗性水平判定标准用Epi Info 3.5.3软件做抗性分布图。结果江门地区白纹伊蚊BI和诱蚊诱卵器指数(MOI)季节消长多数呈单峰趋势,5、7-9月为密度高峰期。2015-2017年BI最高分别为14.23、12.85和7.36;MOI最高分别为11.39、20.41和14.86。7个市(区)平均BI、MOI显示,大部分地区白纹伊蚊密度呈低密度状态。7个白纹伊蚊幼蚊种群对氯菊酯均呈敏感,对高效氯氰菊酯、残杀威、溴氰菊酯、双硫磷、Es-生物烯丙菊酯呈低抗或敏感。新会区种群对四氟甲醚菊酯呈现中抗,其他均为低抗。结论应加强对白纹伊蚊密度及抗药性监测,合理使用杀虫剂,延缓抗性产生,并将监测结果与蚊媒传染病进行关联分析,为城市蚊虫控制及蚊媒病的预防提供指导意见。展开更多
基金supported by the National Key S&T Special Projects(No.2016ZX05024001003)Open Fund for SINOPEC Key Laboratory of Geophysics(No.WTYJY-WX2017-01-01)+1 种基金SINOPEC Technologies R&D Program(Nos.JP17039 and JP17037)Youth Scientific and technological Innovation Team of Southwest Petroleum University(No.2017CXTD08)
文摘High-quality seismic geometry is the key to obtain high-quality seismic data, and can affect the accuracy of data processing and imaging. Based on the analysis of the relationship between the quality of the geometry and the four acquisition parameters(the number of traces, shot line spacing, and the space and number of receiver lines), a quality evaluation method of the geometry based on comprehensive quality factor(CQF) is proposed, and the relationship between the geometry quality and the four parameters is given. We use field data collected in an oil field in Western China with complex geology: First we use a wide azimuth geometry. Then, we calculate the relationship curve between geometry and data quality by varying each parameter while keeping the rest fixed. and the analysis results are given by using the CQF evaluation method. The results show that the shot-line spacing has the greatest effect on the quality of the geometry, and the increase of the receiver line spacing can appropriately improve the quality of the geometry, and the increase of the number of receiving traces can improve the geometry quality. The different acquisition parameters have different effects on the imaging quality of shallow and deep events. The model forward and prestack depth migration are used to generate prestack depth migration profiles with different acquisition parameters. The imaging results are consistent with the above calculated results. According to the depth of the target layer, the quality factor evaluation method is applied to guide the design of the geometry and optimize the acquisition parameters to improve the imaging accuracy of seismic data.
文摘目的了解2015-2017年广东省江门地区白纹伊蚊季节消长规律及抗药性水平,为白纹伊蚊防制提供科学依据。方法采用布雷图指数(BI)法和诱蚊诱卵器法,于2015-2017年在江门市的7个市(区)的城市居民区逐月开展白纹伊蚊种群密度监测;采用WHO推荐的幼虫浸渍法开展幼虫抗药性测定。用SPSS 19.0软件进行生物测定数据统计,获得半数致死浓度(LC_(50)),根据抗性水平判定标准用Epi Info 3.5.3软件做抗性分布图。结果江门地区白纹伊蚊BI和诱蚊诱卵器指数(MOI)季节消长多数呈单峰趋势,5、7-9月为密度高峰期。2015-2017年BI最高分别为14.23、12.85和7.36;MOI最高分别为11.39、20.41和14.86。7个市(区)平均BI、MOI显示,大部分地区白纹伊蚊密度呈低密度状态。7个白纹伊蚊幼蚊种群对氯菊酯均呈敏感,对高效氯氰菊酯、残杀威、溴氰菊酯、双硫磷、Es-生物烯丙菊酯呈低抗或敏感。新会区种群对四氟甲醚菊酯呈现中抗,其他均为低抗。结论应加强对白纹伊蚊密度及抗药性监测,合理使用杀虫剂,延缓抗性产生,并将监测结果与蚊媒传染病进行关联分析,为城市蚊虫控制及蚊媒病的预防提供指导意见。