硅酸盐钻井液中SiO_2消耗特性评价  

The Consumption of SiO_2 of Silicate Muds

作　　者：蔡利山[1] 王文立[1] 宋明全[1] 常连玉[1] 

机构地区：[1]中石化石油勘探开发研究院德州钻井研究所

出　　处：《钻井液与完井液》2007年第3期1-6,共6页Drilling Fluid & Completion Fluid

摘　　要：如何合理控制硅酸盐的用量是影响硅酸盐钻井液体系使用的一个重要问题。在现场一般可以通过测定滤液中的SiO2含量来确定所需硅酸盐的维护量,但体系中的SiO2含量往往受到众多因素的影响,以致于造成现场判断硅酸盐含量时会出现较大误差,进而影响现场维护作业。从实际使用角度出发,就钻井液中可能对SiO2含量造成影响的各种因素进行了实验评价。结果认为,组成钻井液的各种材料对SiO2均具有一定的消耗能力,其中以沥青类物质的消耗作用最明显,其次是氧化物类加重材料和蒙脱土,但整个体系对SiO2的消耗量并不是每种材料单独存在情况下消耗量的简单叠加;高价金属盐对钻井液体系中的SiO2具有清除作用。此外由于钻井液在使用过程中的客观条件和自身的组分也在不断变化,因此SiO2的消耗方式和消耗数量的变化也很大,最终的消耗量要在实际测定结果的基础上,结合维护过程中的处理剂使用情况进行合理确定。The control of the concentration of silicate plays a key role in the application of silicate muds.In field practice,this is done by testing the SiO2 content in the mud filtrate,which might be affected by several factors,leading to an inaccurate measurement and poor mud maintenance.This paper discusses the influencing factors of SiO2 concentration in mud filtrate,and concludes that each additive in mud affect to some extent the concentration of SiO2,whereas asphalt 'eats' most of SiO2 consumed by mud chemicals.The second are the oxide weighting materials and bentonite.The overall consumption of SiO2 is not a simple superposition of the SiO2 consumed by each mud additive.The multivalent metal salts remove SiO2 from the mud.Since the composition of muds are changing all the time,the consumption of SiO2 by mud additives are also changing.The total amount of SiO2 consumed should be calculated based on the actual measurement,and the maintenance of silicate mud should be based on this calculated results.

关 键 词：硅酸盐钻井液 钻井液性能 硅酸盐 消耗 评价 影响因素 

分 类 号：TE254.3[石油与天然气工程—油气井工程]