笔架岭区块大位移井固井技术研究及应用

发布时间：2018-03-22 10:55

  本文选题：大位移井　切入点：套管居中　出处：《东北石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：本文分析了国内外大位移井固井技术的发展研究现状,针对笔架岭区块的大位移井,分析了该区块固井技术上的难点,并有针对性的提出了控制措施。针对套管下入及居中的问题,引入了极限偏心距理论,针对带扶正器的套管串下入中的摩阻问题进行了理论分析并提出了计算模型,通过现场应用测得的数据进行分析、比较,实际测得的结果和计算的结果,误差保证在7%上下,这比不考虑扶正器影响的模型计算结果更真实,更接近施工情况。针对固井水泥浆体系的问题,结合笔架岭区块封固段长、固井过程中易发生井漏的特点,提出在固井施工作业中采用低密度水泥浆加常规密度水泥浆的双凝固井水泥浆体系,开发出相应配套的外加剂,优选出降失水剂DWJS-1、分散剂DWF、早强剂DWZ-1,开发出能够降低水泥石弹性模量的增韧材料DWZR-105。由于该区块大位移井封固段较长,必须使用低密度水泥浆降低静液柱压力,开发出适用于笔架岭区块的密度范围为1.30~1.50g/cm3,温度使用范围为45℃~70℃的低密度水泥浆,该水泥浆体系可以较好的解决该区块大位移井固井过程中容易出现的井漏问题。以紧密堆积理论和超混合复合材料机理为理论指导,开发出适用于笔架岭区块大位移井的常规密度增韧水泥浆体系,该体系水泥浆性能稳定,稠化时间可调,水泥浆稠化时过度时间短,水泥石弹性模量低,7d弹性模量(GPa)在5.02-5.27之间。
[Abstract]:In this paper, the present situation of cementing technology for extended reach wells at home and abroad is analyzed, and the difficulties of cementing technology in Bijialing block are analyzed. Aiming at the problem of casing entry and center, the limit eccentricity theory is introduced, and the friction problem in casing string with centralizer is analyzed theoretically and the calculation model is put forward. By analyzing the measured data in the field, comparing the actual measured results with the calculated results, the error is guaranteed to be about 7%, which is more true than the model results without the influence of centralizer. In view of the problem of cementing cement slurry system, combined with the characteristics of long sealing section in Bijialing block and easy occurrence of well leakage during cementing, In the cementing operation, the dual solidified well cement slurry system with low density cement slurry and conventional density cement slurry is used to develop the corresponding admixture. Water loss reducing agent DWJS-1, dispersant DWFand early strength agent DWZ-1 were selected to develop toughening material DWZR-105which can reduce the elastic modulus of cement stone. Because of the long cementing section of the extended reach well in this block, it is necessary to use low density cement slurry to reduce the hydrostatic column pressure. A low density cement slurry with a density range of 1.30 ~ 1.50 g / cm ~ (3) and a temperature range of 45 鈩，

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