西安科技大学学报2017，Vol.37Issue(6)：879-885,7.DOI:10.13800/j.cnki.xakjdxxb.2017.0617
延长地区延长组储层非均质性特征
Reservoir heterogeneity characteristics of Yanchang Formation in Yanchang Region
摘要
Abstract
In order to study the reservoir heterogeneity characteristics of Yanchang Formation in Yanchang Region,from the macroscopic and microscopic aspects,according to the logging data,core observation,core analysis data and mercury testing method,we discuss the influence of parameters on reservoir heterogeneity.The results show that the rhythm of the particle size distribution has a certain control effect on the reservoir heterogeneity in the vertical direction.The site of particle size uniformity is better,the layer of the larger stratified structure density has poorer physical properties,the thinner the interlayer,the smaller the distribution,the more prone to vertical hydrocarbon migration,the interlayer has on important influence on the distribution of oil and gas in the vertical.The heterogeneity of the layers can be evaluated by the parameters such as permeability coefficient of variation,splitting coefficient and step difference.The interlayer acts as a barrier to fluid movement.The planar continuity and physical properties of reservoir sand bodies are important factors to control reservoir heterogeneity.The sandbody of delta underwater distributary channel constitutes the basic skeleton of oil-bearing sandbody in Yanchang Formation.The distribution of sand bodies in different phases shows different connectivity and heterogeneity.The secondary porosity formed by the primary porosity and the later transformation in the diagenetic process controls the full extent of the oil and gas entering the reservoir.We believe that the reservoir heterogeneity of the Yanchang Formation in Yanchang Region is characterized by the inhomogeneity of the factors such as grain size rhythm,stratified structure,interlayer,permeability,sand body geometry and pore structure.关键词
延长组/储层非均质性/沉积作用/延长地区Key words
Yanchang Formation/reservoir heterogeneity/sedimentary effect/Yanchang Region分类
能源科技引用本文复制引用
马东升,符超峰,李克永,李续彬,王涛,贺志亮,朱谨谨..延长地区延长组储层非均质性特征[J].西安科技大学学报,2017,37(6):879-885,7.基金项目
国家自然科学基金(41140028) （41140028）
