欢喜岭—齐家地区中生界地质特征研究
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摘要
辽河油田欢喜岭—齐家地区中生界厚度变化大、岩性复杂,不仅地层落实困难,而且岩性识别也有难度。通过对17口井岩心的肉眼观察和15块岩石薄片的镜下鉴定,结合地层岩性的测井响应特征,分析了中生界岩性及其特征;利用三维地震解释技术,研究了中生界油气分布规律;结合该区断裂特征分析和中生界与前中生界的联系,对中生界油气分布进行了研究。综合分析研究认为,中生界主要发育两套地层,一套以火山建造为主,一套以沉积建造为主;中生界油气分布既受控带断层的控制,也受前中生界潜山古地貌的影响;中生界不同类型火山岩的密度和自然伽马测井相应特征明显不同。
The formation in Mesozoic of Huanxiling-Qijia area has the features of large variations in formation thickness and complex lithology; it is difficult to determine the formation and to distinguish the lithology. By naked eye observation for 17 wells' core and the identification under the lens for 15 pieces of rock slices,the author analyzed the lithology features of Mesozoic formation with the formation lithology well-logging response features. The paper studied the Mesozoic formation distribution rules by using 3D seismic interpretation technology and Mesozoic oil and gas distribution with the analysis of the area' s faulting features and the relationship between Mesozoic and Pre-Mesozoic. The comprehensive analysis and study showed that there are two sets of formations mainly developed in Mesozoic,one is predominated by volcanoes' construction,the other is predominated by sedimentary construction,the distribution of Mesozoic formation is controlled by controlled belt faults and is also influenced by palaeogeomorphology of Pre-Mesozoic buried hills,the logging response features of the density and nature gamma for the various type of volcanoes in Mesozoic are obviously different.
The formation in Mesozoic of Huanxiling-Qijia area has the features of large variations in formation thickness and complex lithology; it is difficult to determine the formation and to distinguish the lithology. By naked eye observation for 17 wells' core and the identification under the lens for 15 pieces of rock slices,the author analyzed the lithology features of Mesozoic formation with the formation lithology well-logging response features. The paper studied the Mesozoic formation distribution rules by using 3D seismic interpretation technology and Mesozoic oil and gas distribution with the analysis of the area' s faulting features and the relationship between Mesozoic and Pre-Mesozoic. The comprehensive analysis and study showed that there are two sets of formations mainly developed in Mesozoic,one is predominated by volcanoes' construction,the other is predominated by sedimentary construction,the distribution of Mesozoic formation is controlled by controlled belt faults and is also influenced by palaeogeomorphology of Pre-Mesozoic buried hills,the logging response features of the density and nature gamma for the various type of volcanoes in Mesozoic are obviously different.
引文
[1]王悦田,林生华,吕文起,等.辽河盆地西部凹陷地层及典型岩性图集[M].北京:地质出版社,2009.
[2]谭延栋.测井学[M].北京:石油工业出版社,2004:591.
[2]谭延栋.测井学[M].北京:石油工业出版社,2004:591.
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