安塞油田化学清防蜡工艺效果分析  

Effect analysis of chemical paraffin removal and control technology in Ansai Oilfield

作　　者：赖南君[1] 李俊 吕亿明[2] 刘中嵘 李敏[1] 乔东宇 邓嘉雯 LAI Nanjun;LI Jun;LYU Yiming;LIU Zhongrong;LI Min;QIAO Dongyu;DENG Jiawen(College of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu 610500,Sichuan,China;Oil and Gas Technology Research Institute,Changqing Oil Company,Xi’an 710018,Shaanxi,China;The Second Oil Production Plant of Changqing Oilfield Branch,Qingyang 745000,Gansu,China;CNPC West Drilling Engineering Technology Research Institute,Urumqi 830001,Xingjiang,China)

机构地区：[1]西南石油大学化学化工学院,四川成都610500 [2]长庆油田分公司油气工艺研究院,陕西西安710018 [3]长庆油田分公司第二采油厂,甘肃庆阳745000 [4]中国石油西部钻探工程技术研究院,新疆乌鲁木齐830011

出　　处：《化工进展》2020年第10期4164-4174,共11页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(51404208);中国石油科技创新基金(2018D-5007-0207);油气藏地质及开发工程国家重点实验室(成都理工大学)开放基金(PLC20180103);四川省科技计划(应用基础研究)(2018JY0515);南充市科技项目(市校科技战略合作专项)(NC17SY4017)。

摘　　要：含蜡原油开采过程中,油井普遍存在结蜡现象。行之有效的清防蜡工艺是保障油井稳产的重要因素,化学清防蜡工艺应用效果受沉没度、产液量及含水率等的影响,在油井复杂条件下,其现场应用效果难以评价。为研究清防蜡工艺的应用效果,本文基于清防蜡工艺原理,以安塞油田清防蜡工艺应用前后的高含蜡原油和沉积物为研究对象,分析了原油族组成、蜡组成、蜡含量、析蜡点、黏度和溶蜡速率;通过比较确定了4个评价指标,引入多目标评价方法,建立了清防蜡工艺效果评价体系。研究表明清防蜡工艺应用后原油黏度降低;蜡的碳数C16~C30的百分含量降低,C30以上的百分含量升高;原油平均蜡含量变化率为22.99%;原油平均析蜡点变化率为2.86%;各清防蜡剂溶蜡速率均大于0.0160g/min;CQ-1工艺和CQ-2工艺的综合得分较高,现场应用效果良好。计算结果与安塞油田应用化学清防蜡工艺的方向一致,具有较强的参考性。During the production of waxy crude oil,the phenomenon of paraffin deposition is common in oil well.Effective paraffin removal and control technology is an important factor to ensure stable production of oil wells,and the application effects of chemical paraffin removal and control technology are affected by sinking degree,fluid production,water content,etc.Thus it is difficult to evaluate the field application effects of chemical process under complex conditions in oil well.In order to study the application effect of paraffin removal and control technology,based on its principle,the high waxy crude oil and sediment before and after the application of paraffin removal and control technology in Ansai Oilfield were taken as the study object,and the composition of crude oil group,paraffin composition,wax content,wax appearance temperature(WAT),viscosity and paraffin dissolution rate were analyzed.Four evaluation indexes were determined through comparison,a multi-objective evaluation method was introduced,and evaluation system of wax removal and control technology was established.The results showed that after the application of paraffin removal and control technology,the viscosity of crude oil was reduced;the percentage content of C16—C30 decreased and the percentage above C30 increased;the average change rate of wax content in crude oil was 22.99%;the average change rate of WAT of crude oil was 2.86%;the paraffin dissolving rate of each paraffin remover and inhibitor was greater than 0.0160g/min;the comprehensive scores of CQ-11 and CQ-3 processes were high,and effects of field application were good.The calculation results are in accordance with the direction of the application of chemical paraffin removal and control technology in Ansai Oilfield,so it has a strong reference.

关 键 词：高含蜡原油 清防蜡剂 评价指标 综合分析 

分 类 号：TE832[石油与天然气工程—油气储运工程]