首页> 外国专利> METHODS FOR CEMENTING IN A SUBTERRANEAN FORMATION USING A CEMENT COMPOSITION CONTAINING CALCIUM SILICATE HYDRATE SEEDS

METHODS FOR CEMENTING IN A SUBTERRANEAN FORMATION USING A CEMENT COMPOSITION CONTAINING CALCIUM SILICATE HYDRATE SEEDS

机译:含硅酸钙水合物种子的水泥组合物在地下地层中固井的方法

摘要

According to an embodiment, a method of cementing in a subterranean formation comprises: introducing a cement composition into the subterranean formation, wherein the cement composition comprises: cement; water; and calcium silicate hydrate (C-S-H) seeds, wherein a test cement composition consisting essentially of: the cement; the water; and the C-S-H seeds, and in the same proportions as in the cement composition, develops a compressive strength of at least 1,200 psi (8.3 MPa) when tested at 24 hours, a temperature of 60° F. (15.6° C.), and a pressure of 3,000 psi (20.7 MPa); and allowing the cement composition to set. According to another embodiment, the C-S-H seeds are mesoscopic particles, nanoparticles, or combinations thereof, and wherein the C-S-H seeds are in a concentration in the range of about 1% to about 5% by weight of the cement.
机译:根据一个实施方案,在地下岩层中固井的方法包括:将水泥组合物引入地下岩层中,其中所述水泥组合物包括:水泥;水;水合硅酸钙种子(C-S-H),其中测试水泥组合物基本上由以下组成:水;和CSH种子,以与水泥组合物中相同的比例,在24小时,60°F(15.6°C)的温度下进行测试时,其抗压强度至少达到1200 psi(8.3 MPa)。压力为3,000 psi(20.7 MPa);使水泥组合物凝固。根据另一个实施方案,C-S-H种子是介观颗粒,纳米颗粒或其组合,并且其中C-S-H种子的浓度为水泥重量的约1%至约5%。

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