ISSN 1004-4140
CN 11-3017/P
马凌波, 张佳佳, 张广智, 等. 基于岩石物理模型的碳酸盐岩物性参数替换方法[J]. CT理论与应用研究(中英文), xxxx, x(x): 1-16. DOI: 10.15953/j.ctta.2023.185.
引用本文: 马凌波, 张佳佳, 张广智, 等. 基于岩石物理模型的碳酸盐岩物性参数替换方法[J]. CT理论与应用研究(中英文), xxxx, x(x): 1-16. DOI: 10.15953/j.ctta.2023.185.
MA L B, ZHANG J J, ZHANG G Z, et al. Carbonate Rock Physical Property Parameter Substitution Method Based on Rock Physics Models[J]. Computerized Tomography Theory and Applications, xxxx, x(x): 1-16. DOI: 10.15953/j.ctta.2023.185. (in Chinese).
Citation: MA L B, ZHANG J J, ZHANG G Z, et al. Carbonate Rock Physical Property Parameter Substitution Method Based on Rock Physics Models[J]. Computerized Tomography Theory and Applications, xxxx, x(x): 1-16. DOI: 10.15953/j.ctta.2023.185. (in Chinese).

基于岩石物理模型的碳酸盐岩物性参数替换方法

Carbonate Rock Physical Property Parameter Substitution Method Based on Rock Physics Models

  • 摘要: 碳酸盐岩的物性参数在油气勘探和开发的过程中起着重要的作用,且碳酸盐岩为具有多重孔隙类型的岩石,复杂的孔隙类型使得孔隙度与弹性参数之间的关系非常离散。本文基于岩石物理模型,提出一种碳酸盐岩物性参数替换的方法,首先对碳酸盐岩储层进行岩石物理建模,对模型中的等效孔隙纵横比进行反演,在进行替换时,保持其他参数不变,只改变孔隙度、方解石含量、含水饱和度和孔隙形状的体积分数中的一项。再结合AVO理论,进行正演模拟,正演模拟揭示孔隙度与孔隙形状的变化对地震响应的影响更为强烈,远远大于方解石含量和含水饱和度变化的影响,方解石含量和含水饱和度的变化对于地震响应的影响较微弱。实际资料应用表明,文章提出的碳酸盐岩物性参数的替换方法可以有效的分析物性参数及孔隙形状变化的影响,表征岩石的物理性质并判断岩石的孔隙类型。

     

    Abstract: The physical properties of carbonate rocks play a crucial role in the exploration and development of oil and gas. Carbonate rocks are characterized by multiple types of porosity, and the complex porosity types result in a highly discrete relationship between porosity and elastic parameters. In this paper, a method based on rock physics models for substituting the physical property parameters of carbonate rocks is proposed. Initially, rock physics modeling is conducted on carbonate rock reservoirs, and inversion of the equivalent pore aspect ratio in the model is performed. During the substitution, all other parameters are kept constant, and only one of the porosity, calcite content, water saturation, or volumetric fraction of pore shapes is changed. In combination with amplitude versus offset (AVO) theory, forward modeling simulations are performed. The simulations reveal that the impacts of changes in porosity and pore shapes on seismic response are more significant, far exceeding the influences of variations in calcite content and water saturation, which have a weaker effect on seismic response. Application of actual data demonstrates that the method for substituting the physical property parameters of carbonate rocks proposed in this article can effectively analyze the impact of changes in physical property parameters and pore shapes, characterize the physical properties of rocks, and determine the types of rock porosity.

     

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