基于米兰科维奇天文旋回恢复地层剥蚀厚度——以松辽盆地X油田青山口组为例

Recovery of denuded strata thickness based on Milankovitch Astronomical Cycles: A case study of Qingshankou Formation in X Oilfield, Songliao Basin

赵军 曹强 付宪弟 张飞飞 秦国英 闫文雯

ZHAO Jun CAO Qiang FU Xiandi ZHANG Feifei ZHANG Feifei QIN Guoying

中国石油 大庆油田有限责任公司 第十采油厂, 黑龙江 大庆 166405 2. 中国石油 大庆油田有限责任公司 勘探开发研究院, 黑龙江 大庆 163618 3. 中国地质大学(武汉) 资源学院, 武汉 430074

No. 10 Oil Production Plant, PetroChina Daqing Oilfield, Daqing, Heilongjiang 166405, China 2. Exploration and Development Research Institute, PetroChina Daqing Oilfield, Daqing, Heilongjiang 163618, China 3. Faculty of Earth Resources, China University of Geosciences(Wuhan), Wuhan, Hubei 430074, China

基于米兰科维奇天文旋回理论分析松辽盆地X油田青山口组剥蚀厚度，频谱分析和小波变换揭示出青山口组存在米兰科维奇天文旋回，可检测出100 ka偏心率、40 ka斜率和20 ka岁差3个周期。研究区的42口探井滤波结果显示，100 ka偏心率周期数量在35~43之间，说明地层存在剥蚀现象。研究表明，X油田青山口组剥蚀量在0~98 m之间，自东北向西南，其剥蚀厚度逐渐减薄，在西南出现大面积分布的未剥蚀区；青山口组在沉积过程中或沉积末期，X油田局部区域出现构造抬升并遭受剥蚀。

The Milankovitch Astronomical Cycles were applied to study the erosion thickness of Qingshankou Formation (K2qn) in the X Oilfield, Songliao Basin. Spectral analysis and wavelet transform revealed that the Milankovitch Cycles occurred in the K2qn. We detected the eccentricity period of 100 ka, obliquity period of 40 ka and precession period of 20 ka in the K2qn. The bandpass filtering of 42 exploratory wells in the X Oilfield showed that, the K2qn has 35 to 43 eccentricity periods of 100 ka, which proved erosion phenomenon. The erosion thickness of K2qn is 0-98 m, and gradually decreases from northeast to southwest, where non-denuded areas distribute widely. Tectonic uplift and erosion took place regionally in the X Oilfield during or at the end of the sedimentation of K2qn.

国家科技重大专项课题（2011ZX05010-001）资助。

https://doi.org/10.11781/sysydz201802260