赵淑娥,李聪,邹娟,张致恺,张云峰,王方鲁,彭维松,张晓龙
Zhao Shu'e,Li Cong,Zou Juan,Zhang Zhikai,Zhang Yunfeng,Wang Fanglu,Peng Weisong,Zhang Xiaolong

• 1:中国石油冀东油田公司勘探开发研究院
• 2:东北石油大学地球科学学院
• 3:多资源协同陆相页岩油绿色开采全国重点实验室

摘要(Abstract)：

深层剥蚀量恢复是沉积盆地构造演化与成藏研究的核心基础，然而，传统声波时差法由于未充分考虑深层再压实效应与物理约束，在深层应用中偏差显著。基于Athy孔隙压实公式与Wyllie声波时差公式，构建岩石骨架声波时差修正模型，并提出岩石物性归一化方法，以削弱岩性差异对压实趋势拟合的干扰，确保声波时差取值的统一性。将该修正模型应用于渤海湾盆地南堡凹陷沙河街组一段（Es_1）深层剥蚀量的恢复，并与传统指数模型进行对比验证。结果表明：修正模型能够有效校正再压实效应，约束深层物理条件，其恢复结果更符合目的层同沉积等实际地质特征；该修正模型提升了深层剥蚀量恢复的精度，在南堡凹陷沙河街组的实际应用中，平均修正量为682 m，平均修正率达66.0%，通过构造趋势闭合法验证误差多在6.2%以内，针对复杂工况可结合更多方法协同优化以进一步提升精确度。研究成果实现了深层剥蚀厚度恢复的优化修正，可为盆地模拟及油气运移路径的追踪提供关键科学支撑。
Restoration of deep denudation thickness is a core foundation for studying tectonic evolution and hydrocarbon accumulation in sedimentary basins. However, conventional acoustic transit time method exhibits significant deviations in deep formation due to insufficient consideration of deep re-compaction effect and physical constraints. Based on Athy porosity compaction formula and Wyllie acoustic transit time formula, a rock matrix acoustic transit time correction model is established, and a petrophysical normalization method is proposed to mitigate the interference of lithological differences on compaction trend fitting, ensuring the uniformity of acoustic transit time values. This correction model is applied to restore the deep denudation thickness of the first member of Shahejie Formation(Es_1) in Nanpu Sag of Bohai Bay Basin, with comparative verification against the traditional exponential model. The results show that the correction model can effectively correct re-compaction effect and constrain deep physical conditions, and its restoration results are more consistent with actual geological characteristics such as syn-sedimentation of target layer. This correction model improves the accuracy of deep denudation thickness restoration. In the practical application to Shahejie Formation in Nanpu Sag, the average correction thickness reaches 682 m with an average correction rate of 66.0%. The error verified by the structural trend closure method is mostly within 6.2%. For complex working conditions, further accuracy improvement can be achieved through collaborative optimization with additional methods. The research achieves optimization and correction for restoring deep denudation thickness, providing key scientific support for basin simulation and hydrocarbon migration pathway tracing.

关键词(KeyWords)： 岩石骨架声波时差;地层剥蚀量;深层剥蚀量恢复;南堡凹陷
rock matrix acoustic transit time;formation denudation thickness;restoration of deep denudation thickness;Nanpu Sag

Abstract:

Keywords:

基金项目(Foundation): 油气重大专项“新型油气勘探开发国家科技重大专项”（2024ZD1400100）子课题“古近系深层油气富集规律与增储领域”（2024ZD1400104）;; 国家自然科学基金项目“源下型陆相致密油富集机理及地质-工程评价技术研究”（42172150）

作者(Author): 赵淑娥,李聪,邹娟,张致恺,张云峰,王方鲁,彭维松,张晓龙
Zhao Shu'e,Li Cong,Zou Juan,Zhang Zhikai,Zhang Yunfeng,Wang Fanglu,Peng Weisong,Zhang Xiaolong

DOI: 10.19597/J.ISSN.1000-3754.202601046

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