俞林-子洲地区上古生界储层敏感性实验研究

Experimental Study of Sensitivity of Upper Paleozoic Sandstone Reservoirs in YulinmZizhou Area

本文针对鄂尔多斯盆地东部上古生界气藏选取24块样品开展敏感性实验。研究表明，储层具有常温低压低孔低渗的特点，储层应力敏感性和水锁效应强是储层伤害的主要形式，其原因在于储层平均孔喉半径细小，微裂缝较发育，喉道类型以片状喉道为主。在速敏、水敏、盐敏、酸敏、碱敏实验分析基础上研究认为研究区储层敏感性总体表现为弱敏感性．

For the Upper-Paleozoic gas reservoir in the east of Ordos basin, 24 samples were taken for sensitivity test. The test results show that the reservoir has the characteristics of low-pressure, low-porosity and low-permeability, and the stress sensitivity and water lock effects are the main manifest of reservoir damage. The causes are that the average radius of reservoir pore throat is small, micro fractures are more developed and the pore throats are mainly the flaky type. Based on the analysis of the velocity sensitivity, water sensitivity, salinity sensitivity, acid sensitivity, alkali sensitivity experiments, researches have been carried out indicated that the general sensitivity of the reservoir in the research plot is weak.