彰武地区钻井液体系优化设计

发布时间：2018-10-24 08:21

【摘要】：彰武地区勘探初期钻井速度慢、钻井周期长、复杂状况频发,严重制约着该地区的油气的勘探开发。本文在调研国内外文献提高钻井速度的基础上,结合彰武地区钻井的实际情况,提出通过优化钻井液体系及优化钻头、动力组合提高机械钻速。提高钻速最显著的途径是公共优化钻具组合,主要是通过对比各个层位的钻头及螺杆使用情况,优选出每个层位使用情况较好的钻头、螺杆组合。而本文主要是通过优化钻井液体系提高机械钻速。钻井液提高钻井速度主要是通过减少非生产时间及井下复杂情况的发生。彰武地区上部地层黏土含量高,易造浆、掉块、坍塌。因此优选了三种抑制性较好的钻井液体系备选,即钾铵基聚合物钻井液体系、水包油钻井液体系、低密度有机盐钻井液体系。结合彰武地区钻井实际情况最终选用了钾铵基聚合物钻井液体系。对钾铵基聚合物钻井液体系进一步优化,并运用岩屑滚动回收实验、线性膨胀实验、流变性实验、絮凝实验、常温常压失水实验等多种方法对主要处理剂进行筛选评价。最终得出优化后的钾铵基聚合物钻井液体系为：4%膨润上+5%Na2CO3+0.4%KPAM+1.5%NH4HPAN+3%FT-99+2%HA树脂+0.5%PB-1。室内实验和现场应用表明,该体系具有优异的性能,不仅具有很强的抑制性,还具有良好的流变性能,能够有效的减少划眼等非生产时间并能够减少井下复杂情况的发生,节约钻时,降低钻井总成本。
[Abstract]:The exploration and development of oil and gas in Zhangwu area is seriously restricted by its slow drilling speed, long drilling period and frequent complex conditions. On the basis of investigation and investigation of domestic and foreign literatures to improve drilling speed, combined with the actual situation of drilling in Zhangwu area, this paper puts forward that the mechanical drilling speed can be improved by optimizing drilling fluid system and optimizing drill bit. The most significant way to improve drilling speed is to optimize the combination of drill tools, mainly by comparing the use of drill bits and screws in each layer, and selecting the best bit and screw combination of each layer. In this paper, the drilling speed is improved by optimizing drilling fluid system. Drilling fluid improves drilling speed mainly by reducing non-production time and complex downhole conditions. Zhangwu area upper layer clay content is high, easy to make slurry, fall, collapse. Therefore, three kinds of drilling fluid system with good inhibition, namely potassium ammonium polymer drilling fluid system, water in oil drilling fluid system and low density organic salt drilling fluid system, were selected. Combined with the actual drilling conditions in Zhangwu area, potassium ammonium polymer drilling fluid system was finally selected. The potassium ammonium based polymer drilling fluid system was further optimized, and the main treatment agents were screened and evaluated by several methods, such as cuttings rolling recovery experiment, linear expansion test, rheological experiment, flocculation experiment, water loss test at room temperature and atmospheric pressure, etc. Finally, the optimized potassium ammonium polymer drilling fluid system was obtained as follows: 5%Na2CO3 0.4%KPAM 1.5%NH4HPAN 3%FT-99 2%HA resin 0.5 and PB-1 on 4% swelling. Laboratory experiments and field applications show that the system has excellent performance, not only has very strong inhibition, but also has good rheological performance, can effectively reduce the non-production time, such as scratching, and can reduce the occurrence of complex downhole conditions. Save drilling time, reduce the total cost of drilling.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE254

【参考文献】