清洁压裂液室内研究  

Laboratory study on clean fracturing fluid.

作　　者：崔会杰[1] 李建平[2] 王立中[3] 

机构地区：[1]华北石油管理局井下工艺研究所 [2]华北石油管理局华宇石油化工有限公司 [3]华北石油管理局井下作业公司

出　　处：《钻井液与完井液》2005年第3期41-43,共3页Drilling Fluid & Completion Fluid

摘　　要：低压、低渗透油层使用聚合物压裂液不仅会在压开裂缝的表面形成滤饼,还会产生部分残渣留在地层和支撑裂缝中,造成二次污染,影响压裂效果。研制出了增稠剂VES-I和VES-Ⅱ,并优选出了适用于20-120℃的清洁压裂液配方,即:将水、增稠剂VES-I和VES-Ⅱ、胶束促进剂SYN、KCI等按一定比例混合,搅拌形成粘弹性胶体。该压裂液破胶后无残渣,其独特配方消除了阳离子表面活性剂的润湿反转作用对地层可能造成的伤害,所以,不会降低地层的渗透率及支撑裂缝的导流能力。该压裂液配制简单,不需要杀菌剂和破胶剂,具有流变性能好、造缝与携砂能力强、对地层伤害小、使用方便等优点。When a polymer fracturing fluid is used in low pressure oil layer of low permeability, not only filter cake forms at surface of induced fractures, but residue resorts in formations or in induced fractures, produces secondary damage to reservoir, impairing the fracturing effect. VES-Ⅰand VES-Ⅱ,thickening agent for fracturing fluid, were developed, and a clean fracturing fluid for 20-120℃ was optimized, which included water, VES-Ⅰ,VES-Ⅱ,micelle promoter SYN and KC1. Using this fluid, no residue is produced to damage formation permeability and flow conductivity of induced fractures. With no bactericidal agent and breaking agent, the fracturing fluid is easy to prepare. Other advantages of it are good rheological property, strong fracture making ability and sand carrying capacity, and little damage to formation, etc.

关 键 词：压裂液 表面活性剂 防止地层损害 交联 破胶 携砂性 

分 类 号：TE257.12[石油与天然气工程—油气井工程]