余家坪油井结垢分析及防护技术研究  

Study on scaling analysis and protection technology of Yujiaping oil wells

作　　者：郭栋栋 熊圣呈 艾小凡 齐春民 刘刚[2] 谢志海[3] GUO Dongdong;XIONG Shengcheng;AI Xiaofan;QI Chunmin;LIU Gang;XIE Zhihai(Shaanxi Yanchang Petroleum Clean Energy Technology Co.,Ltd.,Yan’an 716000,China;Water Injection Project Area Management Headquarters of Yanchang Oilfeld Co.,Ltd.,Yan’an 716000,China;College of Chemistry and Materials Science,Northwest University,Xi’an 710127,China)

机构地区：[1]陕西延长石油洁能科技有限公司,陕西延安716000 [2]延长油田股份有限公司注水项目区管理指挥部,陕西延安716000 [3]西北大学化学与材料科学学院,陕西西安710127

出　　处：《应用化工》2024年第11期2773-2776,共4页Applied Chemical Industry

基　　金：国家自然科学基金青年项目(21706214)。

摘　　要：余家坪油区已进入高含水开发期,油井因结垢而堵塞的井数不断增多,检泵、维修频繁,严重影响油区的正常生产。分析了采出水的组成,研究了采出水的结垢趋势,对垢样进行了分析鉴别。结果表明,结垢指数ST:0<ST<1,形成无机垢的趋势很小;垢物中甲苯溶解物大于98.82%,石油醚溶解物达65.97%以上,为有机蜡垢。优选出了BY-2清蜡剂,其清蜡速率0.021~0.036 g/min;油井加药后,抽油机最大载荷平均下降2.54 kN,降低14.03%,检泵周由加药前的225 d延长到378 d,延长了153 d。The Yujiaping oilfield has entered the development period of high water cut,the oil wells in the oil area are seriously blocked,and the pump inspection and maintenance are frequent,which seriously affect the normal production of the oil area.In order to clarify the type of scale deposition in Yujiaping oilfield and take specific measures,the composition of produced water was analyzed,the scaling trend of produced water was studied,and the scale samples were identified.The results show that the trend of inorganic scale formation was small because 0<ST<1;the dissolution of the scale in toluene was more than 98.82%,and the dissolution of petroleum ether was more than 65.97%,which is organic wax scale.BY-2 Paraffin remover was selected,and the paraffin removal rate was 0.021~0.036 g/min.After the paraffin removal agent was added to the oil well,the average maximum load of the pumping unit was reduced by 2.54 kN,a decrease of 14.03%,and the pump-checking cycle of oil wells was extended from 225 d before dosing to 378 d,an extension of 153 d.

关 键 词：油井 垢样鉴别 有机蜡垢 清蜡剂 

分 类 号：TQ075[化学工程] TE358.2[石油与天然气工程—油气田开发工程]