中南大学学报（自然科学版）2012，Vol.43Issue(3)：1072-1079,8.
高压低渗砂岩油藏储层驱替特征及影响因素
Displacement characteristics and influencing factors in deep section high pressure and low-permeability sandstone reservoir
摘要
Abstract
The displacement characteristics and influencing factors of deep section high pressure and low-permeability sandstone reservoir in Dongpu Sag were analyzed with the water and N2 flooding experiment. The result shows that the better the permeability, the wider the two-phase region, and the better the displacement effect. The distribution of the two-phase point of intersection is relatively focused in water flooding experiment, and the distribution of relative permeability curves of gas phase is relatively emanative. The effect of gas flooding in ultra-low permeability reservoir is better, while that of water flooding is better in low permeability reservoir. The factors that affect displacement characteristics mainly include displacement rate, effective overburden pressure, start-up pressure gradient of two phases, and reservoir properties. There is a prime displacement rate in ultra-low permeability reservoir. The effective overburden pressure should be minimal in displacement. The oil displacement efficiency can not be largely improved. The differences of displacement characteristics between N2 flooding and water flooding lie in the differences of mobility ratio, wettability, micro-pore structure and the seepage law.关键词
深层高压低渗透砂岩油藏/驱替特征/驱油效率/微观孔隙结构/两相启动压力梯度Key words
deep section high pressure and low-permeability sandstone reservoir/ displacement characteristics/ oil displacement efficiency/ micro-pore structure/ start-up pressure gradient of two phases分类
能源科技引用本文复制引用
王瑞飞,吕新华,国殿斌..高压低渗砂岩油藏储层驱替特征及影响因素[J].中南大学学报（自然科学版）,2012,43(3):1072-1079,8.基金项目
国家自然科学基金资助项目(51104119) （51104119）
陕西省自然科学基金资助项目(2010JQ5002) （2010JQ5002）
陕西省教育厅自然科学专项项目(11JK0741) （11JK0741）
