新疆油田乌夏断裂带压裂液返胶原因与对策——以凤城1井为例  

CAUSE FOR VISCOSITY RE-INCREASING OF FRACTURING FLUID AND ITS COUNTERMEASURE,WUXIA FAULT ZONE: AN EXAMPLE FROM FENGCHENG 1 WELL OF XINJIANG OILFIELD

作　　者：郑克祥[1] 怡宝安[2] 袁文义[2] 王佳[2] 

机构地区：[1]中国石油新疆油田公司西部钻探固井压裂工程公司 [2]中国石油新疆油田公司采油工艺研究院

出　　处：《天然气勘探与开发》2011年第3期49-51,57,共4页Natural Gas Exploration and Development

摘　　要：以凤城1井为例,针对新疆油田乌夏断裂带风南断壁佳木河组断层在压裂作业中出现的压裂液返胶现象进行了分析,并提出了解决方案。对乌夏断裂带佳木河组断层储层岩石中所含矿物进行分析发现,硼、钛、锆等金属离子含量过高是造成压裂液破胶不彻底及返胶现象的主要原因,并由此提出了采用非植物胶压裂液体系及生物酶与过硫酸盐复配的压裂液破胶体系的解决方案。Taking Fengcheng 1 well as an example,this paper analyzes viscosity re-increasing of fracturing fluid for fault of Jiamuhe Formation,Wuxia fault zone,Xinjiang oilfield,and then advances its solution.According to the analysis on minerals within reservoir rocks of the fault,it is found that significantly high content of metal ions including boron,titanium and zirconium is the major cause of viscosity re-increasing.Therefore,a solution to adopt both plant-free gel fracturing fluid system and fracturing fluid gel-breaking system made by bio-enzyme and persulfate is put forward.

关 键 词：压裂液 返胶 破胶 压裂改造 

分 类 号：TE357[石油与天然气工程—油气田开发工程]