摘要
珠江组储层是恩平24-2油田主力油层之一。根据SY/T5358-2010《储层敏感性实验评价方法》,试验研究了储层流速敏感性、水敏感性、盐度敏感性、酸敏感性、碱敏感性和应力敏感性。研究结果表明,储层速敏程度中等偏强、水敏程度中等偏强、碱敏程度中等偏强、应力敏程度中等偏强,对盐酸和土酸均没有表现酸敏性,储层临界流速为0.75ml/min,临界矿化度为31725～52875mg/L,临界pH值为9,临界应力为3.5MPa。并从储集层中粘土矿物类型、产状、相对含量以及储集层孔喉的发育特征等方面进行了敏感性伤害机理分析,为现场制定开发方案提供了相关理论依据。
The reservoir in Zhujiang Formation was one of the major reservoirs in Enping 24-2 Oilfield.According to the industrial standard of SY/T5358-2010《Method for Reservoir Sensitivity Evaluation》,the reservoir sensitivities such as velocity sensitivity,water sensitivity,salinity sensitivity,acid sensitivity,alkaline sensitivity and stress sensitivity were studied by experiment.The results show that the velocity sensitivity of the reservoir is medium to strong,water sensitivity is medium to strong,alkaline sensitivity is medium to strong,stress sensitivity is medium to strong,no sensitivity occurred to hydrochloride and mud acid,the critical velocity of the reservoir is 0.75ml/min,the critical salinity is 31725～52875mg/L,the critical pH value is 9,the critical stress is 3.5MPa.The sensitivity-damage mechanism is analyzed from the aspects of type,occurrence and relative content of clay minerals as well as development features of pore throat in the reservoir.It provides relevant theoretical basis for modification of field development plans.
出处
《石油天然气学报》
CAS
CSCD
2012年第6期119-122,169,共4页
Journal of Oil and Gas Technology
关键词
恩平24—2油田
珠江组
储层
敏感性评价
损害程度
Enping 24-2 Oilfield
Zhujiang Formation
reservoir
sensitivity evaluation
damage degree
