Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Cement paste, application and well cementation method
The invention relates to the field of oil and gas well engineering, and discloses cement paste, application and a well cementation method, the cement paste comprises cement, a water reducing agent, a fluid loss agent, a defoaming agent and water; relative to 100 parts by weight of cement, the content of the water reducing agent is 1-3 parts by weight, the content of the fluid loss agent is 0.5-3 parts by weight, the content of the defoaming agent is 0.1-1 part by weight, and the content of the water is 18-35 parts by weight; wherein the water reducing agent is a polycarboxylic acid water reducing agent. The density of the cement paste is 1.95-2.25 g/cm < 3 >, the upper and lower density difference is smaller than or equal to 0.01 g/cm < 3 >, the drainage amount is smaller than or equal to 50 mL/30 min, the SPN value is 1-3, and the fluidity is larger than or equal to 20 cm. The cement paste is cured for 48 hours under the condition of 20-180 DEG C, the compressive strength of the obtained set cement is 28-60 MPa, and the permeability is 0.001-0.01 mD. The cement paste has the comprehensive performance of high density, good stability, strong gas channeling resistance and good cement sheath sealing integrity, does not need to be additionally added with a high-cost weighting agent and a suspending agent, and has the effects of reducing cost and improving efficiency.
本发明涉及油气井工程领域，公开了一种水泥浆及应用和固井的方法，所述水泥浆包括：水泥、减水剂、降失水剂、消泡剂和水；相对于100重量份的所述水泥，所述减水剂为1‑3重量份、所述降失水剂为0.5‑3重量份、所述消泡剂为0.1‑1重量份和水为18‑35重量份；其中，所述减水剂为聚羧酸减水剂。该水泥浆的密度为1.95‑2.25g/cm3，上下密度差≤0.01g/cm3，析水量≤50mL/30min，SPN值为1‑3，流动度≥20cm；该水泥浆在20‑180℃条件下固化48h，所得水泥石的抗压强度为28‑60MPa，渗透率为0.001‑0.01mD。该水泥浆具有高密度、稳定性好、防气窜性强和水泥环密封完整性好的综合性能，无需额外添加高成本的加重剂和悬浮剂，降本增效。
Cement paste, application and well cementation method
The invention relates to the field of oil and gas well engineering, and discloses cement paste, application and a well cementation method, the cement paste comprises cement, a water reducing agent, a fluid loss agent, a defoaming agent and water; relative to 100 parts by weight of cement, the content of the water reducing agent is 1-3 parts by weight, the content of the fluid loss agent is 0.5-3 parts by weight, the content of the defoaming agent is 0.1-1 part by weight, and the content of the water is 18-35 parts by weight; wherein the water reducing agent is a polycarboxylic acid water reducing agent. The density of the cement paste is 1.95-2.25 g/cm < 3 >, the upper and lower density difference is smaller than or equal to 0.01 g/cm < 3 >, the drainage amount is smaller than or equal to 50 mL/30 min, the SPN value is 1-3, and the fluidity is larger than or equal to 20 cm. The cement paste is cured for 48 hours under the condition of 20-180 DEG C, the compressive strength of the obtained set cement is 28-60 MPa, and the permeability is 0.001-0.01 mD. The cement paste has the comprehensive performance of high density, good stability, strong gas channeling resistance and good cement sheath sealing integrity, does not need to be additionally added with a high-cost weighting agent and a suspending agent, and has the effects of reducing cost and improving efficiency.
本发明涉及油气井工程领域，公开了一种水泥浆及应用和固井的方法，所述水泥浆包括：水泥、减水剂、降失水剂、消泡剂和水；相对于100重量份的所述水泥，所述减水剂为1‑3重量份、所述降失水剂为0.5‑3重量份、所述消泡剂为0.1‑1重量份和水为18‑35重量份；其中，所述减水剂为聚羧酸减水剂。该水泥浆的密度为1.95‑2.25g/cm3，上下密度差≤0.01g/cm3，析水量≤50mL/30min，SPN值为1‑3，流动度≥20cm；该水泥浆在20‑180℃条件下固化48h，所得水泥石的抗压强度为28‑60MPa，渗透率为0.001‑0.01mD。该水泥浆具有高密度、稳定性好、防气窜性强和水泥环密封完整性好的综合性能，无需额外添加高成本的加重剂和悬浮剂，降本增效。
Cement paste, application and well cementation method
水泥浆及应用和固井的方法
YANG GUANGGUO (Autor:in) / LIU RENGGUANG (Autor:in) / MIAO XIA (Autor:in) / LU PEIQING (Autor:in) / LIU KUI (Autor:in) / DU JINLONG (Autor:in)
05.07.2024
Patent
Elektronische Ressource
Chinesisch
Cement paste, application and well cementation method
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