Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Cement additive, cement composition and cement slurry
The invention relates to a cement additive, a cement composition and cement paste, and belongs to the technical field of oil and gas well cementation. The cement additive mainly comprises the following components in parts by mass: 15 parts of quartz sand, 15.5 parts of silicon powder, 18-22 parts of S105-grade mineral powder, 1-3 parts of kiln dust, 1-3 parts of calcium oxide, 3-5 parts of aluminum oxide and 1-2 parts of anhydrous sodium metasilicate. In the cement additive disclosed by the invention, calcium oxide and aluminum oxide can adjust the silicon-calcium ratio of cement stone, so that the cement stone is promoted to form a Ca-Si-O-Al three-dimensional network structure body under a high-temperature condition, and the stability of a cement stone framework structure at the high temperature is improved. The set cement formed by curing the cement paste has good elasticity and toughness, after being subjected to 315 DEG C high-temperature steam curing for 7 days and 14 days, the set cement still has good compressive strength and permeability, the compressive strength is still kept to be 25 MPa or above, and the permeability is within 3 * 10 <-3 > mu m < 2 >.
本发明涉及水泥添加剂、水泥组合物、水泥浆，属于油气井固井技术领域。本发明的水泥添加剂，主要由以下质量份数的组分组成：石英砂15份、硅粉15.5份、S105级矿粉18～22份、窑灰1～3份、氧化钙1～3份、氧化铝3～5份和无水偏硅酸钠1～2份。本发明的水泥添加剂中，氧化钙和氧化铝可调节水泥石的硅钙比，促使其在高温条件下形成Ca‑Si‑O‑Al三维网状结构体，提高高温下水泥石骨架结构的稳定性。本发明的水泥浆固化形成的水泥石具有较好的弹韧性，经过315℃高温蒸汽养护7d及14d后，水泥石仍具有较好的抗压强度及渗透率，抗压强度仍保持在25MPa以上，渗透率在3×10‑3μm2以内。
Cement additive, cement composition and cement slurry
The invention relates to a cement additive, a cement composition and cement paste, and belongs to the technical field of oil and gas well cementation. The cement additive mainly comprises the following components in parts by mass: 15 parts of quartz sand, 15.5 parts of silicon powder, 18-22 parts of S105-grade mineral powder, 1-3 parts of kiln dust, 1-3 parts of calcium oxide, 3-5 parts of aluminum oxide and 1-2 parts of anhydrous sodium metasilicate. In the cement additive disclosed by the invention, calcium oxide and aluminum oxide can adjust the silicon-calcium ratio of cement stone, so that the cement stone is promoted to form a Ca-Si-O-Al three-dimensional network structure body under a high-temperature condition, and the stability of a cement stone framework structure at the high temperature is improved. The set cement formed by curing the cement paste has good elasticity and toughness, after being subjected to 315 DEG C high-temperature steam curing for 7 days and 14 days, the set cement still has good compressive strength and permeability, the compressive strength is still kept to be 25 MPa or above, and the permeability is within 3 * 10 <-3 > mu m < 2 >.
本发明涉及水泥添加剂、水泥组合物、水泥浆，属于油气井固井技术领域。本发明的水泥添加剂，主要由以下质量份数的组分组成：石英砂15份、硅粉15.5份、S105级矿粉18～22份、窑灰1～3份、氧化钙1～3份、氧化铝3～5份和无水偏硅酸钠1～2份。本发明的水泥添加剂中，氧化钙和氧化铝可调节水泥石的硅钙比，促使其在高温条件下形成Ca‑Si‑O‑Al三维网状结构体，提高高温下水泥石骨架结构的稳定性。本发明的水泥浆固化形成的水泥石具有较好的弹韧性，经过315℃高温蒸汽养护7d及14d后，水泥石仍具有较好的抗压强度及渗透率，抗压强度仍保持在25MPa以上，渗透率在3×10‑3μm2以内。
Cement additive, cement composition and cement slurry
水泥添加剂、水泥组合物、水泥浆
HAN JING (Autor:in) / ZHANG JUNYI (Autor:in) / ZHANG ZAIHUA (Autor:in) / LIU FU (Autor:in) / HE BINBIN (Autor:in) / ZHENG WENWU (Autor:in) / LEI GUORUI (Autor:in)
03.05.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
ADDITIVE FOR CEMENT COMPOSITION, CEMENT SLURRY, CEMENT COMPOSITION, AND CEMENT CURED BODY
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