低荧光防塌封堵剂的研制及评价

Development and evaluation of the low fluorescence anti-soughing blocking agent

张勇 褚奇 陈勇 苏俊霖 蒲晓林

ZHANG Yong CHU Qi CHEN Yong SU Junlin PU Xiaolin

西南石油大学油气藏地质及开发工程国家重点实验室，四川成都　610500 四川职业技术学院，四川遂宁　629000 中国石化工程技术研究院，北京　100101 中国石化中原油田工程有限公司西南钻井分公司，四川南充　637000

State Key Laboratory for Oil/Gas Reservoir Geology and Exploitation in Southwest Petroleum University, Chengdu 610500, China Sichuan Vocational and Technical College, Suining 629000, China Sinopec Research Institute of Petroleum Engineering, Beijing 100101, China Southwest Drilling Company of Sinopec Zhongyuan Petroleum Engineering Co., Ltd., Nanchong 637000, China

针对现有防塌封堵剂沥青类荧光级别高，石蜡类、聚合醇类易起泡、易大幅增大钻井液黏度，不能满足防塌钻井液需要的缺点，应用二异氰酸酯、乙酸乙酯和多羟基化合物合成出了一种新型封堵剂JA。应用荧光分光光度计和高温高压封堵仪研究了JA 的荧光性和封堵性，评价了JA 钻井液的流变性能。结果表明：JA 荧光强度与蒸馏水近似；120 ℃、3.5 MPa 条件下JA 能在微裂缝和孔隙处快速封堵，形成致密封堵层；3% JA 加入钻井液中不增黏不增稠，对钻井液体系流变性基本无影响。

In view of the drawbacks of present anti-collapse plugging agents,such as kerite whose fluorescence level is high, and paraffin and polyalcohol which are easy to foam and substantially increase the viscosity of drilling fluid, which cannot satisfy the requirement of anti-collapse drilling fluid, a new kind of plugging agent JA is invited with diisocyanate, ethyl acetate and polyhydroxy compounds to composite . Fluorescence spectrophotometer and HTHP plugging spectrometer were used to study the fluorescence and plugging properties of JA and evaluated the rheological properties of JA drilling fluid. The results showed that the fluorescence intensity of JA was low, which was only 30 a.u; under the condition of 120 ℃ and 3.5 MPa, JA could rapidly plug microfissures and porous place and create a dense plugging layer. When 3% JA was added to drilling fluid, it would not thicken or viscosify the drilling fluid, posing nearly no effect on the rheological property of drilling fluid system.

10.13639/j.odpt.2014.03.011