大地电磁测深在北天山前缘油气勘探中的应用
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摘要
北天山前缘地形变化大,地表地震地质条件复杂,实施地震勘探存在一定的技术难点,而大地电磁测深(MT)不受地形约束,实施灵便。利用MT法对该地区的地下地质构造、地层展布特征等进行了研究。对方法技术进行了简述;对勘探区的电性参数进行了分析,建立了电性层层序;将MT资料与重力、磁力和地震资料相结合,进行了构造区带划分、地层产状和厚度分析、断裂系统分析等,并在此基础上,预测了油气勘探有利区带,为该区下一步勘探提供了基础资料。
The foothill belt area of northern Tianshan is characterized by drastically changing terrain as well as complex seismic and geologic condition. There exits technical difficulty to conduct seismic prospecting. Magneto-telluric (MT) method is agile without restraint from terrain. Therefore, MT method is applied to research subsurface geologic structure and the expanding characteristic of stratum. Basic technology and method are summarized. The electrical parameters in exploration area are analyzed. The electrical level sequence is established. By combining the MT data with the gravity, the magnetic and seismic data, the structure area is classified, the occurrence and thickness of stratum and the fault system are analyzed, and Favorable petroleum exploration belt is predicted based on above analysis.
The foothill belt area of northern Tianshan is characterized by drastically changing terrain as well as complex seismic and geologic condition. There exits technical difficulty to conduct seismic prospecting. Magneto-telluric (MT) method is agile without restraint from terrain. Therefore, MT method is applied to research subsurface geologic structure and the expanding characteristic of stratum. Basic technology and method are summarized. The electrical parameters in exploration area are analyzed. The electrical level sequence is established. By combining the MT data with the gravity, the magnetic and seismic data, the structure area is classified, the occurrence and thickness of stratum and the fault system are analyzed, and Favorable petroleum exploration belt is predicted based on above analysis.
引文
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5杨子建．下扬子北部地区电性参数分析[J]．石油物探, 1996,35(2):114-118
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7肖序常,刘训,高锐等．新疆南部地壳结构和构造演化[M]．北京:商务印书馆,2004．62
2严良俊,胡文宝,杨绍芳等编．电磁勘探方法及其在南方碳酸盐岩地区的应用[M]．北京:石油工业出版社, 2001．33-34,62-63
3晋光文,孙洁,王继军．地形对大地电磁测深(MTS)资料的影响[J]．地震地质,1997,19(4):76-78
4苏朱刘,胡文宝,严良俊．电阻率和极化率测深法的正演修正法反演[J]．石油物探,2005,44(2):101-103
5杨子建．下扬子北部地区电性参数分析[J]．石油物探, 1996,35(2):114-118
6张国俊,王仲候．中国石油地质志(卷十五)——新疆油气区(上册)·准噶尔盆地[M]．北京:石油工业出版社, 1993．13-19,96-110
7肖序常,刘训,高锐等．新疆南部地壳结构和构造演化[M]．北京:商务印书馆,2004．62
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