第45卷第4期
油气田化学
石油与天然气化工
CHEMICAL ENGINEERING OF OIL & GAS
51
三塘湖油田微泡沫防漏钻并液技术研究与应用
房炎伟杨佳伟马玉梁王显国赵志强
中国石油集团西部钻探工程有限公司
摘要为减少低压地层的井漏问题，室内将优选出的高效起泡剂与稳泡剂、抑制剂、降失水剂、井壁稳定剂等进行配伍，形成了微泡沫钻井液。在微观结构研究中，微泡沫显示了独特的多层膜结构特征，膜强度高，微泡沫在钻井液中分布均匀，可以有效降低钻井液的密度。室内对微泡沫钻并液性能的研究表明，微泡沫钻井液密度低，可以适应高温高压的地层条件，抑制性强，可较大幅度地提高油气层保护效果。在三塘湖油田的应用表明，微泡沫钻井液适用于封堵低压漏失地层，且现场配制简单、易于转化、维护方便，钻井液性能稳定，能够满足钻井工艺的要求，泥浆泵上水正常，应用井段钻井液密度降低到0.95g/cm以下，防止了井漏情况发生，减轻了油气层污染，保证了钻井工作的顺利进行。
关键词钻井液微泡沫油层保护防漏
中图分类号：TE242
文献标志码：A
D0I: 10.3969/i.issn.1007-3426.2016.04.011
Researchandapplicationofleakprevetionmicro-foam
drillingfluid in Santanghu oilfield
FangYanwei,YangJiawei,MaYuliang,WangXianguo，ZhaoZhiqiang(CNPC Xibu Drilling Engineering Company Limited, Shanshan 838200, China)
Abstract: To solve the problem of well leakage in low pressure reserve , a circulative micro-foam drilling fluid was developed by combining high effective foam agent with foam stabilizer , inhibitor, filtrate reducer and borehole stabilizer . The unique multilayer film structure of micro-foam is made up of one nucleus and two layers and three layers film , and the micro-foam has a high film strength and can be uniformly dispersed in drilling fluid , which can efficiently reduce the density of drilling fluid . The performance evaluation indoors shows that the density of drilling fluid is low , and it is fit for HTHP formation , the rejection capability of drilling fluid is strong , which can effectively enhance reserve protection effect. The applications in Santanghu oilfield demonstrate that the micro-foam drilling fluid is suitable for plugging the low -pressure circulation-lost zones . The drilling fluid is easy to prepare, transform and maintain in field application . The property of drilling fluid is stable , which can meet the requirement of drilling process , and the mud pump works as normal . The drilling fluid density is less than O .95 g/cm, which prevents the well leakage and reduces the reserve pollution . It is approved that the micro-foam drilling fluid is helpful for drilling safety and quality .
Key words : drilling fluid, micro-foam , reserve protection, leak prevention
作者简介，房炎伟（1977一），硕士研究生，工程师，2006年毕业于中国石油大学（华东)应用化学专业，现就职于中国石油集团西部钻探工程有限公司钻井工程技术研究院，从事油田化学研究与应用工作。E-mail:fyfy200(@sina.com