摘要
从沉积微相与油气富集关系的研究入手,剖析了沉积微相对高产富集规律及油井产能高低的控制作用。研究认为,沉积微相制约油井,特别是高中产井的分布,对特低渗储集最有利的相带是三角洲前缘亚相的水下分流河道,其次为河口坝和分流间湾,席状砂储层物性最差,其中水下分流河道砂体孔、渗、饱值最高,且平面上彼此相连。由于河流的侧向迁移,水下分流河道砂体可以在较大范围内连片分布,使之形成油井高产富集的主要区域,即在有利的沉积微相与储层叠合处,储、渗条件最好的区块是井位部署的首选目标区。
The paper analyzes the controlling effect of sedimentary microfacies on the high productive enrichment rule and oil production based on the relation between sedimentary microfacies and hydrocarbon enrichment.The study shows that sedimentary microfacies govern the distribution of oil wells,especially oil wells with high/medium productivity.The phase belts favorable to the ultra-low permeability reservoirs are underwater distributive rivers in delta front aggradations.The next are debouch bar and distributive bay,and the physical property of sheet sand reservoir is the worst.Furthermore,underwater distributive river sandbody is with the highest porosity,permeability and oil saturation,which shall distribute in the large range with continuity.This makes the main region of oil wells with high production.In the other word,the block with favorable sedimentary microfacies and good physical properties is the first block to deploy the oil wells.
出处
《重庆科技学院学报（自然科学版）》
CAS
2011年第2期62-64,共3页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
基金
国家科技重大专项(2008ZX05013)
关键词
特低渗
沉积微相
高产富集
规律
ultra-low permeability
sedimentary microfacies
high productive enrichment
rule
