摘要
本文以西藏尼玛盆地二维地震勘探工程为基础,系统收集分析了西藏高原地区以往地震勘探成果及存在问题,在充分调研和分析研究基础上,结合该地区地形地貌特点及安全、环境保护需要,提出低频可控震源高密度宽线地震采集攻关试验方案,通过实施其攻关效果明显,地震剖面波组特征清楚,资料信噪比较以往有较大提高,不仅满足油气勘探的需要和地方安全要求,而且减少了地震勘探现场施工对环境的破坏,将有效推动西藏高原地区油气勘探进程.
This paper systematically collects and analyzes previous seismic exploration achievements and results of Tibet Plateau based on Tibet Nima Basin 2 D seismic exploration engineering in 2015. The experimental scheme of low-frequency vibroseis with high-density wide line seismic acquisition is proposed based on the region's topography features, safety and environment protection demands. After the implementation, seismic wave group characteristics have become clear and the signal to noise ratio has been improved significantly. Not only the needs of oil and gas exploration and local security requirements have been met, but also the damage to the environment has been reduced. This work will effectively promote gas exploration process in Tibetan plateau.
引文
Cai D J. 1994. High resolution seismic method test in lompol area,Tibet [J]. OGP (in Chinese),29(S1): 134-143.蔡大江. 1994. 西藏伦坡拉地区高分辨率地震方法试验[J]. 石油地球物理勘探,29(S1): 134-143.
Chen Y R,Li Z C,Qin N,et al. 2013. Full waveform inversion with wave equation bi-directional illumination optimization [J]. Progress in Geophysics (in Chinese),28(6): 3015-3021,doi: 10.6038/pg20130624.陈永芮,李振春,秦宁,等. 2013. 波动方程双向照明优化的全波形反演[J]. 地球物理学进展,28(6): 3015-3021,doi: 10.6038/pg20130624.
Guo Y,Yan P S,Xia J J,et al. 2015. Application of low frequency vibrator for 3D seismic exploration in Zhungaer [J]. Equipment for Geophysical Prospecting (in Chinese),25(6): 411- 415.郭勇,闫培胜,夏建军,等. 2015. 低频可控震源在准噶尔盆地某三维项目中的应用[J]. 物探装备,25(6): 411- 415.
Lei Q L,Dai G H,Fu X Y. 1996. Prospect analysis of oil and gas in Tibet [J]. Oil & Gas Geology (in Chinese),17(1): 22-26.雷清亮,戴国汉,傅孝悦. 1996. 西藏油气远景分析[J]. 石油与天然气地质,17(1): 22-26.
Liang X H,Zhou X,Cai M,et al. 2012. High-density wide line seismic acquisition technique and its effect in complex mountainous areas [J]. Journal of Southwest Petroleum University (Seience & Technology Edition) (in Chinese),34(4): 69-74.梁向豪,周旭,蔡明,等. 2012. 复杂山地高密度宽线地震采集技术及应用效果[J]. 西南石油大学学报(自然科学版),34(4): 69-74.
Tao Z F,Zhao Y L,Ma L. 2011. Low frequency seismic and low frequeency vibrator. Equipment for Geophysical Prospecting (in Chinese),21(2): 71-76.陶知非,赵永林,马磊. 2011. 低频地震勘探与低频可控震源[J]. 物探装备,21(2):71-76.
Zhang C H. 2008. Innovation on oil exploration expertise and integrated logistics support boost Tibetan discoveries [J]. China Mining Magazine (in Chinese),17(1): 13-15.张春贺. 2008. 推进西藏高原油气勘查与开发[J]. 中国矿业,17(1): 13-15.
Zhao X Z,Deng Z W,Bai X M,et al. 2015. Environmental seismic field operations in grasslands,Erlian Basin [J]. OGP (in Chinese),50(1): 14-19.赵贤正,邓志文,白旭明,等. 2015. 二连盆地草原区环保地震勘探技术及应用[J]. 石油地球物理勘探,50(1): 14-19.
Zhou B. 2014. On seismic data imaging method for Lunpola Region in Tibet [J]. Journal of Jianghan Petroleum University of Staff and Workers (in Chinese),27(6): 8-10.周斌. 2014. 西藏伦坡拉地区地震资料成像方法研究[J]. 江汉石油职工大学学报,27(6): 8-10.