深水浊积水道隔夹层定量表征建模——以西非下刚果盆地G油田为例

doi:10.11885/j.issn.1674-5086.2024.09.02.03

摘要/Abstract

摘要： 深水浊积水道是深水沉积体系的重要组成部分，具有重要的油气潜能，目前针对深水浊积水道定量研究多聚焦于水道储层，但隔夹层关注较少。在高含水开发后期，单一水道内部夹层对于剩余油预测的影响不可忽视，需要对隔夹层进行体系化研究。针对深水浊积水道内部隔夹层形成了一套表征与建模技术：首先，基于岩芯、测井、地球物理技术形成油藏范围内三级隔夹层构型级次和模式；然后，通过叠前高精度泥质反演形成泥质隔夹层识别数据体，在此基础上对隔夹层的几何形态特征和规模进行定量参数研究；最后，采用基于目标模拟—序贯指示模拟—多点统计学的多级嵌套方法，建立了单一浊积水道内不同级次的隔夹层沉积微相模型，实现了稀井网条件下深水浊积岩单砂体级次的定量模拟，经过后验井的对比验证，模型预测隔夹层岩性符合率达87%。该建模方法实现了浊积单砂体级次隔夹层定量表征，极大地提高了浊积储层表征精度，为剩余油精细预测和挖潜提供了重要指导。

关键词: 浊积水道, 隔夹层定量表征, 嵌套建模, 刚果盆地, 西非

Abstract: As a significant component of turbidite deposition system, turbidite channel has been proven challenging due to its complicated sedimentary hierarchy and strong heterogeneity. Currently, the quantitative research on deep-water turbidite channels mostly focuses on channel reservoirs, but less attention is paid to barrier and interlayer. In the later stage of high water cut development, the influence of interlayer in a single channel on the prediction of remaining oil cannot be ignored, and it is necessary to study the interlayer. In this study, a set of characterization and modeling approach are formed for the barrier and interlayer. First of all, based on core, logging and geophysical techniques, the three-level interlayer architecture levels and models within the reservoir are formed. Then, through the pre-stack shale inversion, the mud interlayer identification data body is formed, and on this basis, the geometric characteristics and scale of the interlayer are quantitatively studied. Finally, a multi-level nested method based on target simulation-sequential indicator simulation-multi-point statistics was used to establish a sedimentary microfacies model of different levels of interlayer in a single turbidite channel, and the quantitative simulation of single sand body level of deep-water turbidite under sparse well pattern conditions was realized. After comparison and verification of posterior wells, the model predicts that the lithology coincidence rate of interlayers is 87%. This modeling approach realizes the quantitative characterization of the interlayer of single sand body, which greatly improves the characterization accuracy of turbidite reservoir, and provides important guidance for remaining oil prediction and production.

Key words: turbidite channel, interlayer chracterization, nestification geomodelling, Congo Basin, West Africa

中图分类号:

TE121

徐睿, 李发有, 张文彪, 陆文明, 苑书金. 深水浊积水道隔夹层定量表征建模——以西非下刚果盆地G油田为例[J]. 西南石油大学学报(自然科学版), 2025, 47(1): 107-118.

XU Rui, LI Fayou, ZHANG Wenbiao, LU Wenming, YUAN Shujin. Deepsea Turbidite Channel Barrier and Interlayer Geomodeling: A Case Study from G Oilfied, Lower Congo Basin, West Africa[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2025, 47(1): 107-118.

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http://journal15.magtechjournal.com/Jwk_xnzk/CN/Y2025/V47/I1/107

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