用于海上抗高温的柔性凝胶水泥浆的设计与评价
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1.中海石油中国有限公司深圳分公司;2.中海油能源发展股份有限公司工程技术深圳分公司

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TE256

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国家自然科学基金青年基金“基于数据驱动的深水钻井溢流智能识别与反演解释研究”,(项目编号51904034)。


Design and Evaluation of Flexible gel Cement Slurry for High Temperature Resistance at Sea
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    摘要:

    高温深井存在水泥浆稠化时间倒转,高温强度衰退,水泥环脆性大和韧性小,引起水泥环封固密封失效等问题,需要研发一种抗高温柔性水泥浆体系提高水泥浆的抗高温能力,强度稳定性,水泥石的弹韧性并降低其温敏性,来确保高温油气井固井施工安全。首先,开发了抗高温柔性凝胶材料,具有良好弹韧性和亲水性特点,可以改善水泥石的力学性能,并研究了其对水泥浆性能的影响。其次,优选300目硅粉,研发了一种抗高温强度稳定剂。另外采用一种宽温度范围抗高温缓凝剂和抗高温降失水剂 ,耐温达到180 ℃。由此形成了一种耐高温柔性凝胶水泥浆体系,并对所设计的高温柔性凝胶水泥浆性能进行了评价。实验结果表明,抗高温柔性凝胶水泥浆体系具有良好的流变性和稠化性能,高温强度稳定性好,力学性能优异,弹性模量低于4.5Gpa,具有良好的柔韧性和弹性形变能力,满足高温油气井固井作业需求。

    Abstract:

    In high-temperature deep wells, there are problems such as reverse thickening time of cement slurry, decline in high-temperature strength, high brittleness and low toughness of cement sheath, and failure of cement sheath sealing. It is necessary to develop a high-temperature resistant flexible cement slurry system to improve the high-temperature resistance, strength stability, elasticity and toughness of cement paste, and reduce its temperature sensitivity, in order to ensure the safety of high-temperature oil and gas well cementing construction. First of all, a high softness resistant gel material was developed, which has good elasticity, toughness and hydrophilicity, and can improve the mechanical properties of cement paste. Secondly, 300 mesh silicon powder was selected and a high-temperature strength stabilizer was developed. In addition, a wide temperature range anti high temperature retarder and anti high temperature loss reducing agent are used, with a temperature resistance of up to 180 ℃. Therefore, a high temperature resistant gel cement slurry system was formed, and the performance of the designed high-temperature flexible gel cement slurry was evaluated. The experimental results show that the anti high softness gel cement slurry system has good rheological and thickening properties, good high temperature strength stability, excellent mechanical properties, elastic modulus less than 4.5Gpa, good flexibility and elastic deformation ability, and meets the needs of high temperature oil and gas well cementing operations.

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  • 收稿日期: 2024-09-30
  • 最后修改日期: 2024-12-31
  • 录用日期: 2025-01-22
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