摘要
针对常规改性淀粉黏度效应大、抗温能力差的缺点,采用酯化改性方式,以醋酸酐、三偏磷酸钠和玉米淀粉为原材料,合成出一种双酯化改性淀粉降滤失剂BZ-JLS,该产品具有良好的分散性和降滤失效果。室内研究结果表明,在150℃老化16 h后,加入1.5%BZ-JLS的基浆常温中压滤失量仅为9.4 mL,而且BZ-JLS具有良好的抗盐抗钙能力,生物毒性、生物降解性及金属含量等均符合环保指标。BZ-JLS在大港油区现场试验1口井,现场应用表明,BZ-JLS与淡水、盐水钻井液均具有良好的配伍性,钻井液黏度变化低,滤失量降低明显。
Conventional modified starch as a filter loss reducer,has the shortcomings of high viscosity effect and poor temperature stability.A double-esterified starch filter loss reducer BZ-JLS was developed to overcome these shortcomings.BZ-JLS was synthesized with acetic anhydride,sodium trimetaphosphate and corn starch.BZ-JLS has good dispersion capacity and filtration control property.Laboratory study showed that a base mud treated with 1.5%BZ-JLS after aging at 150℃for 16 hours had API fluid loss of only 9.4 mL.BZ-JLS also shows good resistance to salt and calcium contamination.The biological toxicity,biodegradation property and metal content all meet the environmental requirements.Field application on a well drilled in Dagang Oilfield showed that BZ-JLS had good compatibility with fresh water and salt water.The mud was only slightly viscosified,while the filtration rate was significantly reduced.
作者
张坤
马红
舒儒宏
刘强
王威
孙双
熊腊生
ZHANG Kun;MA Hong;SHU Ruhong;LIU Qiang;WANG Wei;SUN Shuang;XIONG Lasheng(Tianjin Key Laboratory of Complex Conditions Drilling Fluid,Tianjin 300457;CNPC Bohai Drilling Engineering Company Limited,Tianjin 300457;Petrochina Huabei Oilfield Company,Renqiu,Hebei 062550)
出处
《钻井液与完井液》
CAS
北大核心
2021年第2期142-145,共4页
Drilling Fluid & Completion Fluid
基金
天津市科技计划项目“非常规和深层油气资源开发钻井液关键技术研究”(19PTSYJC00120)资助。
关键词
水基钻井液
降滤失剂
淀粉
酯化
环境保护
Drilling fluid
Esterification
Starch
Filtrate reducer
Environmental protection
