现代地质2012，Vol.26Issue(4)：762-768,7.
深层高压低渗砂岩油藏储层微观孔喉特征:以东濮凹陷文东油田沙三中段油藏为例
Characteristics of Micro-pore Throat in High Pressure and Low-Permeability Sandstone Reservoir of Deep Section:Taking the Middle of the Third Member of Shahejie Formation in Wendong Oilfield, Dongpu Sag as an Example
摘要
Abstract
The features of micro-pore throat in high pressure and low-permeability sandstone reservoir of deep section were analyzed by using the constant-rate mercury injection technology. The research shows there are little difference in the pore's sizes and distribution, the pore radius is unimodal distribution, and the main peak is from 100 |xm to 300 μm. Throat radius is the main factor that controls the reservoir property. The relation between the permeability and the throat radius is better than that between it and the pore radius. There is better correlation between the reservoir property and the pore throat parameters such as the effective throat radius, pore radius, throat volume, pore volume, and pore-to-throat radius ratio. When it comes to the high permeability sandstone sample, the effective pore-to-throat radius ratio is low, and its distribution frequency is high. The better the permeability is, the lower the pore-to-throat radius ratio is, and the more concentrated the distribution of the pore-to-throat radius ratio is. It's analyzed that in the pore throat parameters of the constant-rate mercury injection, the numerical values such as the displacement pressure(pτ) , the median pressure(pc50) , and the largest injection mercury saturation (SHgmax) are lower than that of the conventional mercury injection, and the largest continuous throat radius (Rmax) , the median radius(r50) are larger than that of the conventional mercury injection. Compared with the conventional mercury injection, the pore throat feature parameters from the constant-rate mercury injection are more accurate.关键词
深层高压低渗透砂岩储层/微观孔喉特征/孔喉半径比/恒速压汞/孔喉参数/储层性质Key words
high pressure and low-permeability sandstone reservoir of deep section/ micro pore throat feature/ pore-to-throat radius ratio/ constant-rate mercury injection/ pore throat parameter/ reservoir quality分类
能源科技引用本文复制引用
王瑞飞,吕新华,国殿斌,苏道敏..深层高压低渗砂岩油藏储层微观孔喉特征:以东濮凹陷文东油田沙三中段油藏为例[J].现代地质,2012,26(4):762-768,7.基金项目
国家自然科学基金项目(51104119) （51104119）
陕西省自然科学基金项目(2010JQ5002) （2010JQ5002）
陕西省教育厅自然科学专项(11JK0741). （11JK0741）
