富县黄土塬区二维地震直测线施工方法及效果
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摘要
富县探区位于鄂尔多斯盆地陕北斜坡东南部,断裂不发育,属于山区地形,表层存在着较厚的低速黄土,同时具黄土塬的特点.对二维直测线采集应用以下技术:①多种方法相结合的高精度表层调查获得准确的表层结构以指导设计井深;②"四避四就"的原则和变面元观测系统灵活布设炮点;③折射波静校正解决中、长波长静校正问题,地表一致性剩余静校正解决高频短波长静校正问题.取得了与弯线地震勘探同样的效果.
The exploration area in Fu County is located in the southeast of the North Shaanxi slope in Ordos Basin,and fault is not developed there.The ground feature of the area belongs to mountainous landform,and there is thicker low-speed loess in the surface layer of the area.The studied area presents the characteristics of loess tableland.Three technologies as follows are applied in the arrangement and acquisition of the 2D direct seismic lines in the area:(1)acquitting accurate surface structure by combining several high-precision surface survey methods to guide the design of well depth;(2)flexibly arranging shot-points by using the principle of "avoiding high and selecting low,avoiding steep and selecting gentle,avoiding thick and selecting thin,avoiding yellow and selecting red" and variable flexi-bin geometry;(3)using refraction static correction for the correction of medium--long wave and surface-consistent residual static correction for the correction of high-frequency short wave.By using the technologies,the same result as slalom seismic prospecting is obtained.
The exploration area in Fu County is located in the southeast of the North Shaanxi slope in Ordos Basin,and fault is not developed there.The ground feature of the area belongs to mountainous landform,and there is thicker low-speed loess in the surface layer of the area.The studied area presents the characteristics of loess tableland.Three technologies as follows are applied in the arrangement and acquisition of the 2D direct seismic lines in the area:(1)acquitting accurate surface structure by combining several high-precision surface survey methods to guide the design of well depth;(2)flexibly arranging shot-points by using the principle of "avoiding high and selecting low,avoiding steep and selecting gentle,avoiding thick and selecting thin,avoiding yellow and selecting red" and variable flexi-bin geometry;(3)using refraction static correction for the correction of medium--long wave and surface-consistent residual static correction for the correction of high-frequency short wave.By using the technologies,the same result as slalom seismic prospecting is obtained.
引文
[1]阎世信,吕其鹏.黄土塬地震勘探技术[M].北京:石油工业出版社,2002.
[2]李庆忠.走向精确勘探的道路:高分辨系统工程剖析[M].北京:石油工业出版社,1993.
[3]赵殿栋,吕公河.高精度三维地震采集技术及应用效果[J].石油物探,2001,40(1):1-8.
[4]钱荣钧.炸药震源激发效果分析[J].石油地球物理勘探,2003,38(6):583-588.
[5]程洪涛,黄用勤,胡仁东.黄土塬地区地震勘探激发技术研究[J].工程地球物理学报,2005,2(6):460-465.
[6]孙景旺,杜中东,任文军,等.鄂尔多斯盆地黄土塬区多线地震采集技术[J].石油物探,2003,42(4):505-507.
[7]张庆淮,段卫星,刘斌,等.黄土塬地区地震勘探采集技术[J].石油物探,2001,40(2):84-91,83.
[8]尚新民,石林光,胡贤根,等.复杂地表区低信噪比地震资料处理技术[J].石油物探,2001,40(2):108-115.
[2]李庆忠.走向精确勘探的道路:高分辨系统工程剖析[M].北京:石油工业出版社,1993.
[3]赵殿栋,吕公河.高精度三维地震采集技术及应用效果[J].石油物探,2001,40(1):1-8.
[4]钱荣钧.炸药震源激发效果分析[J].石油地球物理勘探,2003,38(6):583-588.
[5]程洪涛,黄用勤,胡仁东.黄土塬地区地震勘探激发技术研究[J].工程地球物理学报,2005,2(6):460-465.
[6]孙景旺,杜中东,任文军,等.鄂尔多斯盆地黄土塬区多线地震采集技术[J].石油物探,2003,42(4):505-507.
[7]张庆淮,段卫星,刘斌,等.黄土塬地区地震勘探采集技术[J].石油物探,2001,40(2):84-91,83.
[8]尚新民,石林光,胡贤根,等.复杂地表区低信噪比地震资料处理技术[J].石油物探,2001,40(2):108-115.
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