层理性页岩声波各向异性校正方法研究

李贤胜; 刘向君; 梁利喜; 李玮; 高阳; 熊健

doi:10.13809/j.cnki.cn32-1825/te.2020.05.007

油气藏评价与开发 >

2020 , Vol. 10 >Issue 5: 49 - 54

DOI: https://doi.org/10.13809/j.cnki.cn32-1825/te.2020.05.007

方法理论

层理性页岩声波各向异性校正方法研究

李贤胜 ,
刘向君 ,
梁利喜 ,
李玮 ,
高阳 ,
熊健

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1.西南石油大学油气藏地质及开发工程国家重点实验室,四川成都 610500
2.中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依 834000

李贤胜（1996 —）,男,在读硕士研究生,主要研究方向为岩石物理及工程测井。地址：四川省成都市新都区西南石油大学,邮政编码：610500。E-mail: CQKZLXS@qq.com

收稿日期: 2020-02-16

网络出版日期: 2020-09-24

基金资助

国家自然科学基金项目“水岩作用对硬脆性页岩孔隙结构及声波特性影响的研究”(41872167);国家科技重大专项“准噶尔盆地致密油资源潜力、甜点预测与关键技术应用”(2016ZX05046-006);中国石油重大科技专项“准噶尔盆地二叠系页岩油有效动用技术研究与应用”(2017E-0402)

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Correction methods for acoustic anisotropy of bedding shale

Xiansheng LI ,
Xiangjun LIU ,
Lixi LIANG ,
Wei LI ,
Yang GAO ,
Jian XIONG

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1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China
2. Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China

Received date: 2020-02-16

Online published: 2020-09-24

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摘要

层理性页岩的物理、力学性质多表现出较强的各向异性,导致同一地层在直井、水平井中测井响应差异大,造成区域储层评价等困难。基于数值模拟实验方法分析了层理角度、层理密度对页岩纵波各向异性的影响,构建了龙马溪组页岩纵波各向异性校正模型,结合室内纵波实验分析了校正模型的合理性。结果表明,龙马溪组页岩纵波各向异性特征明显,纵波各向异性系数分布在1.088 ~ 1.109;纵波各向异性系数与层理角度正弦值呈二次多项式关系;随着层理密度增加,声波各向异性系数近似线性增加。实例应用表明,利用所构建声波各向异性校正模型能将水平井声波响应合理地校正为直井响应。

关键词： 数值模拟; 页岩; 弹性各向异性; 各向异性校正; 纵波

本文引用格式

李贤胜 , 刘向君 , 梁利喜 , 李玮 , 高阳 , 熊健 . 层理性页岩声波各向异性校正方法研究[J]. 油气藏评价与开发, 2020 , 10(5) : 49 -54 . DOI: 10.13809/j.cnki.cn32-1825/te.2020.05.007

Abstract

The physical and mechanical properties of bedding shales show strong anisotropy, which leads to the significant difference in the logging response of the same formation between the vertical wells and the horizontal wells, and bringing the difficulties in regional reservoir evaluation. Based on the numerical simulations, the influence of orientation and density of bedding on the anisotropy of longitudinal wave has been analyzed, and a correction model for longitudinal wave of shale in Longmaxi formation has been built. Then, combined with the indoor compression wave experiment, the rationality of this new model has been analyzed. The results show that, the longitudinal wave anisotropy of shales in Longmaxi formation is obvious, and the coefficient of longitudinal wave is around 1.088 ~ 1.109. The coefficient of longitudinal wave anisotropy has a quadratic polynomial relation with the sine of the bedding angle, and the anisotropic coefficient increases linearly with the increase of bedding density. Application examples show that this new model can reasonably correct the acoustic response of horizontal wells to that of vertical wells.

Key words： numerical simulation; shale; elastic anisotropy; anisotropic correction; longitudinal wave

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