自贡地区嘉陵江组台内滩储层特征与主控因素

发布时间：2018-01-04 16:01

本文关键词：自贡地区嘉陵江组台内滩储层特征与主控因素　出处：《西南石油大学学报(自然科学版)》2017年05期 　论文类型：期刊论文

【摘要】：针对陆表海台内浅滩单滩体规模小、储层厚度薄、非均质性强、平面分布具随机性、地震预测难度大等问题,以四川盆地自贡地区下三叠统嘉陵江组为例,采用岩芯观察、薄片鉴定、物性分析、压汞及测井等多种资料,开展了陆表海台内浅滩型储层基本特征及储层发育主控因素研究,认为陆表海台内浅滩型储层岩性、储集空间类型、孔喉结构及孔渗关系等均存在较大差异,储层非均质性强。指出了台内浅滩型储层为典型的相控型储层,储层发育受多因素联合控制,其中海平面多旋回的震荡变化决定了台内滩单个储集体厚度小、纵向上多期叠置的分布样式,而台地内部次一级微地貌差异决定了台内滩型储层在早期就具有较强的平面非均质性,同生期岩溶作用是台内浅滩型储层主要的溶蚀作用类型,云化作用极大地改善了储层储渗性能,构造破裂及埋藏溶蚀作用进一步优化了储层质量。
[Abstract]:Aiming at the problems of small scale, thin reservoir thickness, strong heterogeneity, randomness of plane distribution and great difficulty in earthquake prediction, the paper takes Jialingjiang formation of Lower Triassic in Zigong area, Sichuan Basin as an example. By means of core observation, thin section identification, physical property analysis, mercury injection and logging, the basic characteristics of shoal reservoir and the main controlling factors of reservoir development in the surface sea platform are studied. It is considered that there are great differences in lithology, reservoir space type, pore throat structure and relationship between pore and permeability of shoal reservoir in the surface sea platform, and the reservoir heterogeneity is strong. It is pointed out that the shoal reservoir in the platform is a typical facies controlled reservoir. The reservoir development is controlled by multiple factors, among which the fluctuation of sea level polycycle determines the distribution pattern of single reservoir in the platform with small thickness and multiple periods in longitudinal overlay. However, the difference of subprimary microgeomorphology in the platform determines that the flat reservoir has strong plane heterogeneity in the early stage, and the syngenetic karst is the main dissolution type of the shoal reservoir in the platform. Cloud action greatly improves reservoir storage and permeability performance, and structural fracture and burial dissolution further optimize reservoir quality.
【作者单位】：西南石油大学地球科学与技术学院;天然气地质四川省重点实验室;中海石油(中国)有限公司深圳分公司;中国石油西南油气田分公司勘探事业部;中国石油川庆钻探工程有限公司地质勘探开发研究院;
【基金】：中国石油科技创新基金(2015D-5006-0107)
【分类号】：P618.13
【正文快照】： 引言浅水高能颗粒'滩相储层是碳酸法储层的^个黧要组成部分[1—2],根据颗粒滩在碳酸盐岩台地上发育的相对径一般将其划分为台内滩及台地边:缘滩两种基本类型,其滩体特征和储集性能均存在较大差异04,总体而言,台缘滩型储崖要^\l于台内滩_?诨此大型洖滩气藏大多分布在台缘带,如

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