文章摘要
油田注入水与地层水结垢程度评价方法
Evaluation Method for Scaling Degree between Injection Water and Formation Water in Oilfield
  
DOI:10.19346/j.cnki.1000-4092.2017.02.034
中文关键词: 注入水  地层水  配伍性  垢物质量分析法  结垢程度  评价方法
英文关键词: injection water  formation water  compatibility  scale weighting analysis method  scaling degree  evaluation method
基金项目:“十三五”国家科技重大专项示范工程58“渤海油田高效开发示范工程”(项目编号2016ZX05058)
作者单位
陈华兴1,2,沈建军2,刘义刚1,龚小平3,王猛2,唐洪明2,庞铭1,冯于恬1 1. 中海石油(中国)有限公司天津分公司天津3004522. 西南石油大学地球科学与技术学院四川成都6105003. 中石化西南油气分公司川东北采气厂四川阆中637402 
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中文摘要:
      针对传统的垢物质量分析法(称重配伍性实验)只能表征注入水与地层水混合后悬浮物含量的变化,缺乏结垢程度定量评价的方法及标准,为改进传统的垢物质量分析方法,从定性、定量两方面研究了注入水与地层水结垢的类型及结垢强度,提出悬浮垢、沉降垢和总垢等概念,建立了油田注入水与地层水结垢综合评价参数和标准;以渤中28-2S油田馆陶组注入水与明化镇组地层水为例,利用X-射线衍射、扫描电镜和光学显微镜等研究垢的类型和含量。研究结果表明,渤中28-2S 油田注入水与地层水严重不配伍,配伍程度评价综合指数为3.33;注入水与地层水混合后结垢程度综合指数为3.87,结垢程度为中等偏强,易形成CaCO3垢;总垢实测垢量为27.5~94.0 mg/L,注入水与地层水混合体积比1∶1 时的结垢量最大,沉降垢是总垢的主要来源。结垢程度评价方法具有科学性和客观性,可用于评价油田各类流体间结垢程度。图14 表6 参18
英文摘要:
      At present,the traditional scale weighting analysis method which also was called weighting compatibility test could only evaluate the weight of scale but lacking of approaches and standards for quantitative scaling degree evaluation. In order to improve the traditional scale weighting analysis method,the scaling type and scaling degree were evaluated from the two aspects of qualitative and quantitative study. The basic concepts like suspended scale,settling scale and total scale were proposed,and the parameters and standards for scaling degree evaluation of injection water and formation water were established. Taking injection water of Guantao group and formation water of Minghuazhen group in BZ28-2 south oilfield as the research object,the types and content of scale were studied by several approaches such as X-ray diffraction analysis(XRD),scanning electron microscopy (SEM)and optical microscopy analysis(OP). The results showed that the injection water and formation water in BZ28-2 south oilfield were seriously incompatible and the comprehensive evaluation index of fluid compatibility degree was 3.33. The comprehensive evaluation index of the scaling degree was 3.87 and the scaling degree was medium to strong,which was easy to generate CaCO3 scale. The measured total scale was from 27.5 to 94.0 mg/L,and among which the settling scale was predominated. In addition,the scale was the most serious when the volume ratio of injection water to formation water was 1∶1. The scaling degree evaluation method was both scientific and objective,which could be applied to evaluate the scaling degree among various fluid types in oilfield.
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