摘要
阐述了疏松砂岩地层出砂原因、危害及采取防砂措施的重要性,提出将乳化柴油复合水泥浆防砂体系用于低渗疏松砂岩地层,并对防砂体系的配方进行优化。通过对影响防砂体系的主要因素即乳化剂、水泥材料、水灰比、油水比等的考察,得到乳化柴油水泥浆复合防砂体系最佳配方为:G级油井水泥,水灰比=0.43,复合乳化剂中OP-10、RHJ-11摩尔比为3∶1,加量6.0%,柴油、水体积比0.4∶1,石英砂14%,促凝剂CaCl20.4%,增渗剂酚醛树脂2.5%。对优化的复合防砂体系进行了电镜扫描,从微观结构分析了乳化柴油水泥浆复合防砂体系对地层渗透率的保护及防砂作用机理。结果表明,对于疏松沙岩地层,采用乳化柴油复合水泥浆防砂工艺技术防砂效果好,对地层渗透率影响小。
This paper expounded the reasons and harms of sand production and the importance of taking sand control measures in loose sandstone reservoir. The emulsified diesel oil-slurry compound sand control system was applied in loose sandstone reservoir and an optimum formula was obtained. After detailed research on main factors that influenced the compound system such as emulsifier,cement,water-cement ratio and water-oil ratio,the optimum formula of compound sand control system was obtained as follows： class G oil well cement,0.43 water-cement ratio,a combination emulsifier of OP-10 and RHJ-11 in molar ratio 3∶1 with the addition of 6.0%,0.4∶1 diesel oil and water volume ratio,14% quartz sand,0.4% accelerator Ca Cl2,and 2.5% phenolic resin.Besides,electron microscope scanning was utilized for the optimized compound sand control system,and the mechanism of sand prevention and the protection for formation permeability were analyzed according to the microstructure of compound system. The results showed that,as for the loose sandstone reservoir,the emulsified diesel oil-slurry compound sand control system had good sand control effect and it had little influence on formation permeability.
出处
《油田化学》
CAS
CSCD
北大核心
2015年第4期580-583,共4页
Oilfield Chemistry
关键词
疏松砂岩地层
乳化柴油
水泥浆
防砂
loose sandstone reservoir
emulsified diesel oil
slurry
sand control
