成都理工大学学报（自然科学版）2012，Vol.39Issue(2)：113-121,9.
西湖凹陷某构造花港组致密砂岩储层的渗流特征
Seepage flow characteristics of tight sandstone reservoirs in Huagang Formation in a certain structure of Xihu depression in East China Sea Basin
摘要
Abstract
This paper studies the seepage flow characteristics of the tight sandstone reservoirs in Oligocene Huagang Formation in a certain structure of the Xihu depression in East China Sea Basin in order to provide some guiding advices for the highly-effective development of this gas pool. Based on the casting thin sections materials and the scanning electron microscopy materials using the experimental techniques such as physical property test, NMR, mercury pressure, water drive gas, etc. , it studies the pore structure, the gas-water seepage flow characteristics in cores and the influencing factors of in Huagang Formation in a certain structure in the Xihu depression. The results show that most pores of the cores are intergranular pores in the tight sandstone of Huagang Formation. The radius of the pore throat is tiny, the gradation of the pore throat radius is poor, and its pressure is high. The irreducible water saturation of the tight sand stone reservoir is high and the scope of two-phase (gas and water) seepage flowing is narrow. The gas phase relative permeability is lower and it decreases sharply after water increased. The residual gas saturation is higher, the ultimate recovery is low and the recovery at the water-free stage accounts to a large percentage of the ultimate recovery. As a result, great attention should be paid to the recovery at the water-free stage. The percolation characteristics of the reservoir is affected by the physical property, the pore structure, the original water saturation, the wettability, etc. . Among them, the pore structure is the greatest impact.关键词
致密砂岩/孔隙结构/渗流特征/花港组/西湖凹陷Key words
tight sandstone/ pore structure/ seepage flow characteristics/ Oligocene Huagang Formation/ Xihu depression分类
能源科技引用本文复制引用
徐国盛,赵莉莉,徐发,张涛,赵幸滨,张震,刘为..西湖凹陷某构造花港组致密砂岩储层的渗流特征[J].成都理工大学学报（自然科学版）,2012,39(2):113-121,9.基金项目
国家科技重大专项(2011ZX05023-001) （2011ZX05023-001）
