钻井液固相分析与计算中常见问题讨论及处理方法  

Common Problems and Treatment of Solid Phase Analysis and Calculation of Drilling Fluid

作　　者：杨健[1] 蔡利山[2] YANG Jian;CAI Lishan(Southwest Oil&Gas Company,Sinopec,Chengdu,Sichuan 610041,P R of China;Petroleum Engineering Technology Research Institute,Sinopec,Beijing 102200,P R of China)

机构地区：[1]中国石化西南油气分公司,四川成都610041 [2]中国石化石油工程技术研究院,北京102200

出　　处：《油田化学》2022年第2期209-215,共7页Oilfield Chemistry

基　　金：中石化科技部重大科技项目“四川盆地特深井快速钻井配套技术研究”(项目编号P17049-3)。

摘　　要：钻井液固相含量对体系性能、井下安全及施工成本都有明显影响,其测定数值的准确性会直接影响现场维护方案的合理制定以及固相含量控制成本。实践中发现,钻井液固相的测定与数据处理均存在一定的问题,导致测定数值和处理结果误差较大,不同的数据处理方法所引起的误差相差也较大。首先测试一系列现场用钾基聚磺钻井液体系的总固相含量、水含量、油含量,再分别根据GB/T 16783.1—2014《石油天然气工业钻井液现场测试第1部分:水基钻井液》和《钻井手册·上(甲方)》计算钻井液的水相密度、盐矫正后固含量、低密度固相含量、高密度固相含量。分析了固相含量计算结果的准确性,指出了操作和计算中需要注意的几个问题,并探讨了固相含量数值合理范围。此外,对固相含量测定与分析计算中出现的计算值与现场实际操作结果偏离较大的现象作了实例分析。采用国家标准GB/T 16783.1—2014的计算方法引起的误差要远高于采用“钻井手册·上(甲方)”所推荐的计算方法的。在采用误差较小的计算方法时,还需注意应正确理解和使用公式中的各个变量,否则会导致错误的处理结果。介于国家标准GB/T 16783.1—2014所列计算方法存在的误差,建议对标准中相应部分进行修订。Solid content of drilling fluid has significant influence on system performance,downhole safety and construction cost.The accuracy of the measured values will directly affect the reasonable formulation of on-site maintenance programs and the cost of solid content control.In practice,it is found that there are certain problems in the measurement and data processing of drilling fluid solid phase,leading to large errors in the measurement values and processing results.The errors caused by different data processing methods was different greatly.The total solid content,water content and oil content of a series of on-site potassium-based polysulfonic drilling fluid systems were tested.The water-phase density,solid content after salt correction,low-density solid content and high-density solid content of drilling fluid were calculated according to GB/T 16783.1—2014“Petroleum and Natural Gas Industry Drilling fluid Field Test part 1:Water-based Drilling Fluid”and Drilling Manual(Party A),respectively.The accuracy of calculation results of solid content was analyzed,several attentive problems in operation and calculation were pointed out,and the reasonable range of solid content was discussed.In addition,the examples were given to analyze the phenomenon that the calculated value deviated greatly from the actual operation in process of the determination and calculation of solid phase content.The error caused by the calculation method listed in the standard GB/T 16783.1-2014 was much higher than that caused by the calculation method recommended in"Drilling Manual·(Party A)".When using the calculation method with less error,it was also necessary to correctly understand and use the variables in the formula,otherwise,the incorrect processing results would be obtained.Due to the errors in the calculation methods listed in the standard"GB/T 16783.1-2014",it was suggested to revise the corresponding part of the standard.

关 键 词：固相含量 盐含量 固相成分 误差 标准 数据处理 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]