地震勘探中特殊岩性地层中的煤层识别
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摘要
特殊岩性地层的存在往往会干扰其下伏正常地层在地震剖面上的真实反映。以YY三维工区为例,应用正、反演技术及对周边地区的地质认识,得出了该区局部存在煤层及其对下伏正常地层产生屏蔽作用的结论。通过地震属性研究对工区可能发育煤层的区域进行了描述。对YY工区煤层的识别结果及处理效果在后期勘探中得到了印证。
Existence of special lithologic strata often causes interference with actual reflection of its underlying normal formation on profile. By taking YY 3D Working Space as an example,a conclusion of existence of local coal bed in the area and shielding action on the underlying normal formation is reached with forward and inverse methods and recognition of geologic conditions of the peripheral area. The possible coal-bed developed area in the working space is described by studying seismic attribute. The result of coal-bed identification in YY 3D Working Space and its process effect are proven in late exploration.
Existence of special lithologic strata often causes interference with actual reflection of its underlying normal formation on profile. By taking YY 3D Working Space as an example,a conclusion of existence of local coal bed in the area and shielding action on the underlying normal formation is reached with forward and inverse methods and recognition of geologic conditions of the peripheral area. The possible coal-bed developed area in the working space is described by studying seismic attribute. The result of coal-bed identification in YY 3D Working Space and its process effect are proven in late exploration.
引文
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