波阻抗反演及其在隐蔽圈闭预测中的应用

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WAVE IMPEDANCE INVERSION AND ITS APPLICATION TO THE PREDICTION OF SUBTLE TRAPS

摘要: 笔者应用波阻抗反演地震剖面结合测井、岩心资料研究了松辽盆地南部青山口组和姚家组的层序,共识别出9个层序,20个体系域,建立了该区的层序地层格架。通过对波阻抗反演地震剖面进行层序地层、沉积微相、构造解释,共识别出5种类型的隐蔽圈闭,即地层超覆、砂岩透镜体岩性、构造-岩性、断层-岩性和砂岩上倾尖灭型圈闭,并总结了它们在层序地层格架内的分布规律。
- 沉积微相 /
- 层序地层 /
- 隐蔽圈闭 /
- 波阻抗反演
Abstract: By using wave impedance inversion seismic profiles combined with logging and core data, the sequences of the Qingshankou and the Yaojia Formation in the Songliao Basin were preliminary interpreted, nine sequences and twenty system tracts were identified, and the sequence stratigraphic framework of this region was established. Based on the interpretation of sequence stratigraphy, sedimentary microfacies and structures on wave impedance inversion seismic profiles, five types of subtle traps were found, that is, stratigraphic overlap traps, tectonic-lithologic traps, sandstone updip-pinchout traps, fault-lithologic traps and sandstone lens-shaped lithologic traps. Also, their distribution regularities in sequence stratigraphic framework were summarized.
- sedimentary microfacies /
- sequence stratigraphy /
- subtle trap /
- wave impedance inversion

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