Low-carbon cementing material for carbon sequestration well cementation and preparation method of low-carbon cementing material

• Main Authors: LIU AO, TANG GUANBAO, YAO GUANG, WANG XIANBIN, YU YANG, WEN ZHAIJUN, LIU YUN, WANG MIN, HUANG WEN, SHEN XIN, GAO XIANSHU, SUN MINGMING, GUO SUIHUA, ZHANG KUNYUE, ZHI XIAO
• Format: Patent
• Language: Chinese; English
• Published: 21.11.2023
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention relates to a low-carbon cementing material for carbon sequestration well cementation and a preparation method thereof. Relates to the technical field of shale gas well cementation chemistry. Comprising the following raw materials in percentage by mass: 15%-20% of low-calcium limestone, 45%-55% of apatite, 15%-29% of bauxite and 5%-10% of phosphogypsum. The low-calcium limestone is prepared from the following chemical components in percentage by mass: 3.0 percent to 12.0 percent of SiO2, 0.1 percent to 1.5 percent of Al2O3, 0.2 percent to 1.5 percent of Fe2O3, 36.5 percent to 43 percent of CaO and 1.0 percent to 5.0 percent of MgO. According to the invention, energy consumption is reduced while carbon emission is reduced, the setting time of the cement can be delayed to a certain extent, and the production cost of the cement is reduced. 一种碳封存固井用低碳胶凝材料及制备方法。涉及页岩气固井化学技术领域。包括以下质量百分比的原料：低钙石灰石15%～20%、磷灰石45%～55%、铝矾土15%～29%、磷石膏5%～10%。所述低钙石灰石中包括以下质量百分比的化学成分：SiO2 3.0%～12.0%、Al2O3 0.1%～1.5%、Fe2O3 0.2%～1.5%