基于复电阻率—核磁联测实验的三水模型新形式

doi:10.11720/wtyht.2023.1481

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摘要

三水模型在碎屑岩储集层解释中的应用比较广泛,但是三水模型的参数较多,部分参数很难确定,且确定方法多数都是根据研究地区很多实验数据统计而定。为了解决三水模型应用中的多参数问题,本文提出基于复电阻率数据计算阳离子交换容量的新方法,在此基础上提出了三水模型的新形式,并且提出了核磁数据结合遗传最优化算法,确定三水模型的参数值。根据这些参数计算的岩样100%含水时的电阻率与实验测量得到的电阻率相对误差为0.341 7。本文提出的方法简单易用,不需要依赖太多的实验数据,只要有复电阻率和核磁实验数据就可以应用。该方法可以为其他地区确定新三水模型参数提供参考和借鉴。

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	张丽华
	潘保芝
	单刚义
	阿茹罕
	张鹏济

关键词 ：三水模型, 三水模型参数, 复电阻率, 阳离子交换容量, 最优化算法, 核磁

Abstract：

Three-water(free water,microcapillary water,and clay water) models are widely used in the interpretation of clastic reservoirs.However,these models involve many parameters,some of which are difficult to determine.The methods for determining these parameters are mostly based on the statistics of a large amount of experimental data in study areas.To solve the multi-parameter problem in the application of three-water models,this study proposed a new method to calculate the cation exchange capacity based on the complex resistivity data.Accordingly,it built a new three-water model.Then,it determined the parameter values of the three-water model using nuclear magnetic resonance (NMR) data combined with the optimal genetic algorithm.The resistivity of the completely water-saturated rock samples calculated from these parameters had a relative error of 0.3417 compared to the resistivity obtained from experimental measurements.The method proposed in this study is simple and easy to use.Moreover,this method does not rely on too many experimental data but requires only complex resistivity and NMR experimental data.Therefore,this method can be used as a reference for determining the parameters of new three-water models of other areas.

Key words： three-water model three-water model parameters complex resistivity cation exchange capacity optimization algorithm NMR

收稿日期: 2022-09-21 修回日期: 2023-05-29 出版日期: 2023-08-20

ZTFLH:

P631

基金资助:国家自然科学基金面上项目(42072323)

通讯作者: 单刚义(1970-),男,博士,高级工程师,现从事地震数据处理与解释研究工作。Email:shangangyi@jlu.edu.cn

作者简介: 张丽华(1974-),女,博士,正高级工程师,现从事石油地球物理测井的处理与解释研究工作。Email:zhanglh@jlu.edu.cn

引用本文:

张丽华, 潘保芝, 单刚义, 阿茹罕, 张鹏济. 基于复电阻率—核磁联测实验的三水模型新形式[J]. 物探与化探, 2023, 47(4): 1018-1023.
ZHANG Li-Hua, PAN Bao-Zhi, SHAN Gang-Yi, A Ru-Han, ZHANG Peng-Ji. A new three-water model based on the complex resistivity-NMR joint survey experiment. Geophysical and Geochemical Exploration, 2023, 47(4): 1018-1023.

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https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2023.1481 或 https://www.wutanyuhuatan.com/CN/Y2023/V47/I4/1018

Fig.1 三水模型示意

Fig.2 T₂谱上3种水的分布示意

Fig.3 遗传算法基本流程

Fig.4 QHD油田X井6个参数最优化结果与实测R₀对比

Fig.5 QHD油田X井4个参数最优化结果与实测R₀对比

Fig.6 I-S_w关系

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