摘要
针对深井钻井过程中高温高压条件下对钻井液体系性能的特殊要求,在室内试验中通过水溶液聚合法研制出一种适合于深井高温地层的水基降滤失剂SLA-3。对其性能进行了评价,结果表明:降滤失剂SLA-3的相对分子质量适中,对水溶液的黏度增加有限,不会造成钻井液体系的黏度变化过大;经过180℃高温老化后,仍具有较好的热稳定性。在基浆中加入质量分数3%的SLA-3,200℃下老化16 h后的高温高压滤失量可以控制在9.4 m L,具有良好的抗温性能。考察了降滤失剂对不同类型钻井液体系性能影响,试验结果表明:SLA-3在淡水钻井液体系、盐水钻井液体系以及含钙钻井液体系中均表现出良好的降滤失效果,适应性较强,可以满足深井钻井作业对钻井液性能的要求。
According to the special requirements on the performance of drilling fluid system under high temperature and high pressure deep well drilling process,the water base filtrate reducer SLA3has been prepared in the laboratory for high temperature deep well strata by aqueous solution polymerization.The performance of SLA3is evaluated,and the results show that the filtrate reducer SLA3has moderate relative molecular weight,and the viscosity of the solution increases slightly,therefore the filtrate reducer will not lead to too much change on the viscosity of the drilling fluid system.The filtrate reducer SLA3still has better thermal stability after high temperature aging under180℃.Adding mass fraction of3%SLA3in the basic mud after aging at200℃and16h,the high temperature and high pressure filter loss can be controlled to9.4mL,which shows good temperature resistance.The influence of filtrate reducer on performance of different type of drilling fluid systems is investigated,and the results show that the filtrate reducer SLA3exerts good filtration reduction effect in the fresh water drilling fluid system,salt water drilling fluid system and calcium drilling fluid system.The filtrate reducer SLA3has strong adaptability,and can satisfy the demands of drilling fluid performance for deep well drilling process.
作者
周超
马超
ZHOU Chao;MA Chao(Yangtze University, Key Laboratory of Oil Gas Drilling & Production of Hubei Province, Wuhan 430100, China)
出处
《能源化工》
2017年第4期47-50,共4页
Energy Chemical Industry
关键词
深井钻井液
高温高压
降滤失剂
性能评价
deep well drilling fluid
high temperature and high pressure
filtrate reducer
performance evaluation
