A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Ultralow-density cement paste for oil field well cementation
The invention discloses an ultralow-density cement paste for oil field well cementation. The ultralow-density cement paste comprises, by weight, 100 parts of Portland G-grade oil well cement, 40-60 parts of a lightening agent perlite vitrified micro-beads, 75-95 parts of a reinforcing agent blast furnace granulated slag powder, 35-45 parts of a stabilizer micro-silicon, 1 part of a fluid loss agent and 260-280 parts of water. The density of the cement paste is 1.15-1.25 g/cm<3>, and the density of the cement paste can be basically kept constant on the premise that the pressure of an underground liquid column does not exceed 70 MPa. The cost is equivalent to that of conventional low-density cement, and the large-scale application prospect is achieved.
本发明公开了一种用于油田固井的超低密度水泥浆，按重量份包括以下成分及配比：硅酸盐G级油井水泥100份，减轻剂珍珠岩玻化微珠40～60份，增强剂高炉粒化矿渣粉75～95份，稳定剂微硅35～45份，降失水剂1份，水260～280份。本发明的水泥浆密度在1.15‑1.25g/cm，能在井下液柱压力不超过70MPa的前提下，基本保持水泥浆密度恒定不变。且成本与常规低密度水泥相当，具有大规模应用的前景。
Ultralow-density cement paste for oil field well cementation
The invention discloses an ultralow-density cement paste for oil field well cementation. The ultralow-density cement paste comprises, by weight, 100 parts of Portland G-grade oil well cement, 40-60 parts of a lightening agent perlite vitrified micro-beads, 75-95 parts of a reinforcing agent blast furnace granulated slag powder, 35-45 parts of a stabilizer micro-silicon, 1 part of a fluid loss agent and 260-280 parts of water. The density of the cement paste is 1.15-1.25 g/cm<3>, and the density of the cement paste can be basically kept constant on the premise that the pressure of an underground liquid column does not exceed 70 MPa. The cost is equivalent to that of conventional low-density cement, and the large-scale application prospect is achieved.
本发明公开了一种用于油田固井的超低密度水泥浆，按重量份包括以下成分及配比：硅酸盐G级油井水泥100份，减轻剂珍珠岩玻化微珠40～60份，增强剂高炉粒化矿渣粉75～95份，稳定剂微硅35～45份，降失水剂1份，水260～280份。本发明的水泥浆密度在1.15‑1.25g/cm，能在井下液柱压力不超过70MPa的前提下，基本保持水泥浆密度恒定不变。且成本与常规低密度水泥相当，具有大规模应用的前景。
Ultralow-density cement paste for oil field well cementation
一种用于油田固井的超低密度水泥浆
ZHU ZEXIN (author) / HE JIANYONG (author) / SONG YUANHONG (author) / GAO FEI (author) / YAO MING (author) / MA XIANGLI (author) / BI YI (author) / CHEN XINTONG (author) / TIAN BAOZHEN (author) / WANG XINGXING (author)
2020-04-10
Patent
Electronic Resource
Chinese
| European Patent Office | 2020
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