新型生态友好型微乳液基钻井液  

New Eco-friendly Microemulsion-based Drilling Fluid

作　　者：王华 张攀 张琦[2] 靳玉强 都忠建 秦宏宇[3] WANG Hua;ZHANG Pan;ZHANG Qi;JIN Yuqiang;DU Zhongjian;QIN Hongyu(Yumen Oilfield Exploration and Development Research Institute,Jiuquan Gansu 735000,China;Yumen Oilfield Operation Company,Jiuquan Gansu 735000,China;Yumen Oilfield Exploration Division,Jiuquan Gansu 735000,China)

机构地区：[1]玉门油田勘探开发研究院,甘肃酒泉735000 [2]玉门油田作业公司,甘肃酒泉735000 [3]玉门油田勘探事业部,甘肃酒泉735000

出　　处：《当代化工》2024年第7期1625-1629,共5页Contemporary Chemical Industry

基　　金：中国石油科技创新基金项目(项目编号:2020D-5007-0218)。

摘　　要：通过使用水相(水与甘油溶液质量比为1∶1)、油相(松树植物油)和不同的非离子表面活性剂(吐温80、壬基酚聚氧乙烯醚100和150),从微乳液体系中配制出对环境友好的钻井液。在加入增黏剂(黄原胶)、加重剂(巴利丁)、密封剂(方解石)和分散剂(水)的条件下,使用了2种黏土(PA和20A)来配制钻井液流体。分析了配制的钻井液的质量损失、滤失量和流变性等特性。结果表明,流体的剪切应力-剪切速率数据符合Herschel-Bulkley流变模型,R^(2)=0.99。使用PA配制的流体获得了最低的稠度指数,在0.37~0.61,因此,获得了启动流体所需的力也最低。热重分析表明,所制得的微乳化钻井液可在100℃下工作,使其在高温的油井中应用成为可能。滤失量为2.4~4.0 mL,滤饼最大厚度为0.8 mm,渗透率较低(0.0173 mD)。分析结果表明,当加入微乳液体系后,润滑性也有所改善。总体而言,环保型微乳液钻井液具有良好的防膨效果、良好的流变性和较低的API滤失量,可用于油井钻井作业。Environmentally friendly drilling fluids were formulated from microemulsion systems by using aqueous phase(water-glycerol solution 1∶1),oil phase(pine vegetable oil),and different nonionic surfactants(Tween 80,nonylphenol ethoxylates 100 and 150).Two clays(PA and 20A) were used to formulate the fluids with the addition of viscosity builder(xanthan gum),weighting agent(plain),sealing agent(calcite),and dispersant(water).The properties of the formulated drilling fluids such as mass loss,filtration loss,and rheological properties were analyzed.The results showed that the shear stress-shear rate data of the fluids conformed to the Herschel-Bulkley rheological model with R~2 = 0.99.The lowest consistency index was obtained for the fluids formulated with PA,between 0.37 and 0.61,and therefore,the lowest force required to start the fluids was obtained.Thermogravimetric analysis showed that the resulting microemulsified drilling fluid could work at up to 100 ℃,making it possible to apply it in wells with high temperatures.The filtration loss was 2.4~4.0 mL,the maximum thickness of the filter cake was 0.8 mm,and the permeability was low(0.0173 mD).The analysis results showed that the lubricity was also improved when the microemulsion system was added.Overall,the environmentally friendly microemulsion drilling fluid had good deflation effect,good rheology,and low API filtration loss,and could be used in oil well drilling operations.

关 键 词：环境友好 钻井液 表面活性剂 滤失 流变学 

分 类 号：TQ047[化学工程] TE254.3[石油与天然气工程—油气井工程]