摘要
在分析S区块致密砂岩气藏储层特征的基础上,通过岩心流动实验开展了水敏、应力敏、酸敏以及水锁损害评价,以确定储层损害的主要因素。结果表明,S区块储层段岩石以岩屑砂岩为主,粘土矿物含量较高,储层平均孔隙度为6.5%,平均渗透率为0.351×10^(-3)μm^(2),地层水水型为CaCl2型。S区块致密砂岩气藏储层具有强水敏、强应力敏、中等偏弱至中等偏强酸敏及较强的水锁损害特点,水锁损害程度在80%以上。针对储层特征并结合损害因素分析,建议在S区块致密砂岩气藏开发过程中有针对性采取一定的储层保护措施,降低敏感性及水锁损害程度,为S区块致密砂岩气藏的高效开发提供一定的保障。
On the basis of analyzing of the reservoir characteristics of tight sandstone gas reservoir in Block S,we carried out the damage evaluation of water-sensitivity,stress-sensitivity,acid-sensitivity,and water lock through core flow experiments to determine the main factors of reservoir damage.The results show that the reservoir rocks in Block S are mainly lithic sandstone with high content of clay minerals.The average porosity of the reservoir is 6.5%,the average permeability is 0.351×10^(-3)μm^(2),and the formation water type is CaCl2.The tight sandstone gas reservoir in Block S has the characteristics of strong water-sensitivity,strong stress-sensitivity,medium weak to medium strong acid-sensitivity,and strong water lock damage,and the degree of water lock damage is more than 80%.According to the reservoir characteristics and the analyses of damage factors,it is suggested that certain reservoir protection measures should be taken during the development of tight sandstone gas reservoir in Block S to reduce the sensitivity and water lock damage degree,so as to provide a certain guarantee for the efficient development of tight sandstone gas reservoir in Block S.
作者
姚倩
许峰
YAO Qian;XU Feng(School of Earth Sciences,Yangtze University,Wuhan 430100,China;Institute of Petroleum Engineering Technology,Jianghan Oilfield,Wuhan 430000,China)
出处
《化学与生物工程》
CAS
2021年第7期53-56,共4页
Chemistry & Bioengineering
基金
国家科技重大专项(2016ZX05046)。
关键词
S区块
致密砂岩气藏
储层特征
敏感性
损害因素
Block S
tight sandstone gas reservoir
reservoir characteristic
sensitivity
damage factor
