一种用于高泥质砂岩储层解堵液配方实验评价  

Experimental evaluation of a formula of plug removal fluid for high argillaceous sandstone reservoirs

作　　者：张燕利[1] ZHANG Yanlin(Petroleum Engineering Technology Research Institute of Henan Oilfield Company,SINOPEC,Nanyang,Henan 473132,China)

机构地区：[1]中国石化河南油田分公司石油工程技术研究院,河南南阳473132

出　　处：《石油地质与工程》2020年第5期114-117,共4页Petroleum Geology and Engineering

摘　　要：为了防止钻、完井过程中井壁垮塌或控制溢流,井筒内压力一般都大于地层压力,这将导致泥质砂岩含量高的储层易受泥浆污染堵塞,造成新投产井效果差,严重影响正常生产效益。为此,开展室内泥浆滤饼、岩屑的溶蚀实验,岩心流动实验筛选出适合泥质含量高的砂岩储层泥浆污染解堵的酸液配方,达到恢复或改善储层渗透性的目的。实验结果表明,氟硼酸酸液体系在酸化过程中不仅对钻井泥浆有较好的溶蚀能力,而且具有较好的稳砂性能,能有效降低酸液对储层的过度溶蚀。In the process of drilling and completion, in order to prevent wellbore collapse or control overflow, the pressure in the wellbore is generally greater than the formation pressure, which will lead to drilling mud invasion into the reservoir and mud pollution. In view of the problem that the reservoir with high content of argillaceous sandstone is easy to be blocked by mud pollution, resulting in poor effect of new production wells and serious impact on normal production, indoor dissolution experiment of mud filter cake and rock debris is carried out. Through core flow experiment, the acid solution formula suitable for removing mud pollution and plugging in sandstone reservoir with high shale content is selected, so as to recover or improve the permeability of reservoir. The experimental results show that the fluoroborate acid system not only has good corrosion ability to drilling mud, but also has good sand stabilization performance, which can effectively reduce the excessive corrosion of acid to reservoirs.

关 键 词：魏岗油田 解堵液 溶蚀实验 氟硼酸酸液体系 

分 类 号：TE358[石油与天然气工程—油气田开发工程]