摘要
本文报道辽河油田曙一区兴隆台稠油油藏3口井的岩心与强碱性蒸汽冷凝水在高温高压下反应后岩石成分及粘土矿物的变化。在反应条件下高岭石、伊利石分解,最终生成稳定的蒙脱石,反应温度越高,粘土矿物的此种转化程度越高。对于高粘土含量的该油藏,在热采中如不采取防治措施,高温下矿物-水反应导致强膨胀性蒙脱石不断生成,粘土的水敏性膨胀将成为储层的主要伤害因素。
The changes in rock and clay mineral composition of the core samples from thrce production wells of Xinglongtai viscous crude reservoir, district Shuguang I, Liaohc, after having reacted with highly alkaline (pH=11.89) steam condensate at high temperatures and pressures arc determined. It is shown that the most significant mineral-water reactions arc decomposition of kaolinite and illite leading eventually to creation of montmorillonite. The higher the reaction temperature the more violently the clay variety transformation occurs. The swelling of the water-sensible clay mineral will become the principal damaging factor for the named reservior in the course of thermal recovery.
出处
《油田化学》
CAS
CSCD
北大核心
1997年第1期32-35,共4页
Oilfield Chemistry
基金
石油天然气总公司"八五"重点攻关课题"超稠油开采技术"项目的部分研究成果
关键词
水岩反应
粘土矿物
岩石矿物
油层伤害
热力采油
Rock/Water Reactions, Clay Minerals, Rock Minerals, Variety Transformation of Clay Minirals, Reservior Formation Damage, Thermal Oil Recovery, Xinglongtai Reservior in Liaohe
