海相巨厚砂岩油藏夹层精细地质建模方法研究

doi:10.11885/j.issn.1674-5086.2018.11.18.02

摘要/Abstract

摘要： 以塔里木盆地东河1油田石炭系东河砂岩油藏为例，从夹层单井精细识别和连井对比入手，以夹层地质知识库、岩芯分析化验资料和动态资料为约束，建立夹层三维地质模型。研究认为，在完善单层划分对比的基础上，基于地质认识开展层间、层内夹层平面分布研究，采用确定性建模方法将其嵌入到地质模型中，可以得到夹层与储层准确的三维空间配置关系；利用夹层岩芯分析化验资料建立夹层物性解释模型，将孔、渗解释结果作为输入建立夹层属性模型，使得结果更加逼近地下真实情况。后期千万级网格数值模拟运算结果表明，地质知识库与地质建模相结合、地质建模与数值模拟一体化的海相巨厚砂岩油藏夹层地质建模方法效果良好。

关键词: 海相巨厚砂岩, 夹层建模, 夹层地质知识库, 夹层物性解释模型, 千万级网格数值模拟

Abstract: This study takes the Carboniferous Donghe sandstone reservoir in the Donghe 1 Oilfield in the Tarim Basin as an example in geological modeling. It starts with a detailed single-well identification of interlayers and stratigraphic comparison of wells and employs a geological knowledge base for interlayers as well as test and dynamic data of cores to construct a three-dimensional geological model for the interlayers. It is believed that, by improving the division contrasts between the stratigraphic layers, the spatial distributions of the interlayers between and within the stratigraphic layers can be examined based on existing geological knowledge. Deterministic modeling is employed to place the spatial distributions of interlayers into the geological model. As a result, accurate three-dimensional spatial relationships between the interlayers and reservoir layers are obtained. Test data of interlayer core samples are used to establish an explanatory model for their physical properties. The explanatory results for porosity and permeability are adopted as inputs to create an interlayer property model. Thus, the results better reflected the actual underground conditions. Subsequent numerical simulation using tens of million grids demonstrates that geological modeling of reservoir interlayers in thick marine sandstones by integrating the geological knowledge base as in this study and numerical simulation with the geological model can yield satisfactory results.

Key words: thick marine sandstone, interlayer modeling, geological knowledge base for interlayers, explanatory model for physical properties of interlayers, numerical simulation using tens of million grids

中图分类号:

TE122

王开宇, 王超, 范家伟, 徐彦龙, 冉丽君. 海相巨厚砂岩油藏夹层精细地质建模方法研究[J]. 西南石油大学学报(自然科学版), 2020, 42(3): 69-79.

WANG Kaiyu, WANG Chao, FAN Jiawei, XU Yanlong, RAN Lijun. Methods of Detailed Geological Modeling of Reservoir Interlayers in Thick Marine Sandstones[J]. 西南石油大学学报(自然科学版), 2020, 42(3): 69-79.

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