综合阳离子钻井液体系在JZ25-1S区块的应用

发布时间：2018-02-28 17:35

本文关键词： 综合阳离子钻井液材料性能室内试验现场应用　出处：《东北石油大学》2016年硕士论文　论文类型：学位论文

【摘要】：JZ25-1S区块钻井液使用存在地层坍塌应力高,井塌严重,地层水化分散性强,馆陶底砾岩与东营组、沙河街组砂泥岩交界面互层阻卡频繁,起下钻效率低,裸眼段长,携砂困难,易憋压、卡钻等问题。研究本区块先后使用了PEM、PEC、阳离子钻井液体系,其各自表现出了其本身的优缺点的基础上研发了综合阳离子钻井液体系。针对阳离子体系出现的问题,对阳离子体系做了进一步的改进,引入K+和聚合醇,配合阳离子抑制剂,进一步提高钻井液的抑制性;适当降低PF-CPI的加量,引入适量PF-VIF调节切力;引入非离子降失水剂进一步降低失水,并对钻井液施工工艺做了些微调整,逐步形成了现在的综合阳离子体系的操作方案。通过对单剂性能进行评价的方法对综合阳离子钻井液体系进行优化;通过对综合阳离子钻井液进行室内性能评价,该钻井液体系具有抑制性强,钻井液流变性能稳定,防塌抑制性强,抗温性能强等特点。本文分析了综合阳离子钻井液在JZ25-1SE五口井的应用效果,5口井总计工期节约11.02天,提效10.97%。分析了综合阳离子钻井液JZ25-1SA应用效果,对应用效果进行总结得出如下结论:适当有效的抑制性、良好的降失水和封堵性能、优良的流变性能、起下钻效果明显等结论。研究结果对现场有一定意义。
[Abstract]:The drilling fluid used in JZ25-1S block has high formation collapse stress, serious well collapse, strong dispersion of formation hydration, frequent interbedded blocking between Guantao bottom conglomerate and Dongying formation, sand and mudstone interface in Shahejie formation, low drilling efficiency, long open hole section and difficulty in carrying sand. In this block, PEMPECand cationic drilling fluid system have been used successively, and on the basis of their own advantages and disadvantages, a comprehensive cationic drilling fluid system has been developed. Aiming at the problems of cationic drilling fluid, Further improvements were made to the cationic system, including the introduction of K and polyol, and the addition of cationic inhibitors to further improve the inhibition of drilling fluid, the proper reduction of the amount of PF-CPI and the introduction of appropriate amount of PF-VIF to adjust the shear force. Nonionic water loss agent was introduced to further reduce the loss of water, and the drilling fluid construction technology was slightly adjusted. The operation scheme of the present integrated cationic system was gradually formed. The synthetic cationic drilling fluid system was optimized by the method of evaluating the performance of the single agent; the indoor performance evaluation of the synthetic cationic drilling fluid was carried out. The drilling fluid system is characterized by strong inhibition, stable rheological properties, strong anti-sloughing inhibition and strong temperature resistance. The application effect of synthetic cationic drilling fluid in five wells of JZ25-1SE is analyzed in this paper, the total time saving of 5 wells is 11.02 days. The application effect of synthetic cationic drilling fluid JZ25-1SA is analyzed, and the application results are summarized as follows: proper and effective inhibition, good water loss and plugging performance, excellent rheological property, The research results are significant to the field.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TE254

【相似文献】