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A platform for research: civil engineering, architecture and urbanism
The invention relates to the technical field of oil field well repair, in particular to a plugging cement paste system suitable for low and medium fracture pressure petroleum well repair of a guantaogroup stratum. The cement paste system consists of dry powder and water, wherein the dry powder comprises the following components in parts by mass: 50 parts of silicate superfine cement dry powder, 50 parts of G-grade silicate cement dry powder, 0.7 part of polypropylene fiber dry powder and 7 parts of bentonite dry powder; the dry powders are uniformly mixed and blended with water to form a slurry product with the density of 1.95 g/cm<3>. According to the invention, the characteristics of good expansibility and toughness are realized; due to expansibility and toughness, the solidified set cement has the advantages of good impact resistance and high strength; through reasonable proportion, the cement paste has good retardance, the problem of ash squeezing of a low-fracture-pressure stratum is solved, the plugging effect is good, and the pressure test of a plugged well section can meet the design requirement after plug drilling.
本发明涉及油田修井技术领域，特别涉及一种适合馆陶组地层低中破裂压力石油修井用封堵水泥浆体系。该水泥浆体系由干粉剂和水组成，干粉剂的各组成成分及其质量份数为：硅酸盐超细水泥干粉50份，G级硅酸盐水泥干粉50份，聚丙烯纤维干粉0.7份，膨润土干粉7份；上述干粉剂混拌均匀与水调配成密度为1.95克/立方厘米的浆体形成本产品。本发明实现了具有膨胀性和韧性好的特点，由于膨胀性和韧性使凝固后的水泥石具有抗冲击性好，强度高的优点，通过合理的比例配比，使水泥浆具有良好的阻滞性，解决了低破裂压力地层挤灰的难题，其封堵效果好，钻塞后对封堵井段试压能够达到设计要求。
The invention relates to the technical field of oil field well repair, in particular to a plugging cement paste system suitable for low and medium fracture pressure petroleum well repair of a guantaogroup stratum. The cement paste system consists of dry powder and water, wherein the dry powder comprises the following components in parts by mass: 50 parts of silicate superfine cement dry powder, 50 parts of G-grade silicate cement dry powder, 0.7 part of polypropylene fiber dry powder and 7 parts of bentonite dry powder; the dry powders are uniformly mixed and blended with water to form a slurry product with the density of 1.95 g/cm<3>. According to the invention, the characteristics of good expansibility and toughness are realized; due to expansibility and toughness, the solidified set cement has the advantages of good impact resistance and high strength; through reasonable proportion, the cement paste has good retardance, the problem of ash squeezing of a low-fracture-pressure stratum is solved, the plugging effect is good, and the pressure test of a plugged well section can meet the design requirement after plug drilling.
本发明涉及油田修井技术领域，特别涉及一种适合馆陶组地层低中破裂压力石油修井用封堵水泥浆体系。该水泥浆体系由干粉剂和水组成，干粉剂的各组成成分及其质量份数为：硅酸盐超细水泥干粉50份，G级硅酸盐水泥干粉50份，聚丙烯纤维干粉0.7份，膨润土干粉7份；上述干粉剂混拌均匀与水调配成密度为1.95克/立方厘米的浆体形成本产品。本发明实现了具有膨胀性和韧性好的特点，由于膨胀性和韧性使凝固后的水泥石具有抗冲击性好，强度高的优点，通过合理的比例配比，使水泥浆具有良好的阻滞性，解决了低破裂压力地层挤灰的难题，其封堵效果好，钻塞后对封堵井段试压能够达到设计要求。
Plugging cement paste system for low and medium fracture pressure petroleum well repair of guantao group stratum
适合馆陶组地层低中破裂压力石油修井用封堵水泥浆体系
2020-10-30
Patent
Electronic Resource
Chinese
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