吕家庄油田A区块阜二段储层速敏水敏特征  

Characteristics of volecity sensitivity and water sensitivity of Fu-2 reservoir in block A of Lvjiazhuang oilfield

作　　者：程秀梅[1] 

机构地区：[1]中国石化华东分公司石油勘探开发研究院,江苏扬州225007

出　　处：《油气藏评价与开发》2014年第5期18-23,共6页Petroleum Reservoir Evaluation and Development

摘　　要：运用真实砂岩微观模型,对金湖凹陷吕家庄油田A区块阜宁组二段储层开展速敏性、水敏性、速敏后水敏及水敏后速敏评价实验。结果表明,储层普遍具有中等偏弱—弱速敏,渗透率的变化大致可划分为下降区、波动区及平稳区。在相同驱替压力下,Ⅰ类储层的速敏损害率较Ⅱ类储层要小。普遍具有强水敏,随注入水矿化度的不断降低,Ⅰ类储层呈上凸式变化,Ⅱ类呈下凹式变化,最终的损害率较为接近,但Ⅱ类储层经水敏伤害后,相当于Ⅲ类极致密储层,Ⅰ类储层经水敏伤害后,相当于伤害前的Ⅰ—Ⅱ类储层。为避免水敏伤害,注入水矿化度宜控制在7.97 g/L左右。当速敏、水敏同时存在时,水敏对储层的伤害更为明显。By use of real sandstone microscopic model, evaluation experiments of volecity sensitivity, water sensitivity, water sensi-tivity after volecity sensitivity and volecity sensitivity after water sensitivity of Fu-2 reservoir in block A of Lvjiazhuang oilfield in Jinhu depression were conducted. The results show that the reservoirs generally have medium（-） to weak volecity sensitivity and the variation of permeability can be roughly divided into decreasing area, wavy area and smooth area. Under the same displacement pressure, volecity sensitivity damage rate of type I reservoir is lower than type II reservoir. Strong water sensitivity is ubiquity. With the continuously decreasing of the salinity of the injected water, type I reservoir was upward and type II reservoir was downward. The final damage rate of these two type were close. However, type II reservoir turned into type III extra tight reservoir after water sensitivity damage, while type I reservoir turn into type I-II reservoir with the state before damage after water sensitivity damage. In order to avoid water sensitivity damage, the salinity of the injected water was about 7.97 g/L. When the volecity sensitivity and wa-ter sensitivity simultaneously exist, the damage of water sensityvity to reservoir is more obvious.

关 键 词：真实砂岩微观模型 速敏 水敏 阜宁组二段 吕家庄油田 金湖凹陷 

分 类 号：TE122.2[石油与天然气工程—油气勘探]