结蜡油井化学防蜡方式优化  

Parameter Optimization for Chemical Paraffin Control Jobs in Waxing Production Wells

作　　者：李峰[1] 刘晓军[1] 陈云霄[1] 王国兴[1] 王银红[1] 胡斌[1] 高琪[1] 

机构地区：[1]中国石化河南油田分公司第一采油厂,河南南阳474780

出　　处：《油田化学》2008年第2期105-107,174,共4页Oilfield Chemistry

摘　　要：河南油田第一采油厂油井含蜡量高（25％～45％），平均含水已〉85％，使用脂肪胺起始双嵌段聚醚AE0604为清防蜡剂，由环空加入，单次加药15．0～61．7kg，加药周期9.6～31．5天。取油井沉没度、产液量、加药量为变量，分4组完成了近100井次的加药试验，测定加药后产出液中药剂浓度随时间的变化并求出有效药剂浓度（20～200mg／kg）维持时间，得到如下结果：药剂产出峰很陡，峰值出现在加药后5～20小时；有效药剂浓度维持3～8天，受沉没度影响大，产液量的影响次之；加大单次加药量不能延长有效药剂浓度维持时间；加药后水冲洗作业对药剂井下存留时间影响很大。据此制定了加药规范：单次加药量4～15kg，加药周期1～7天，冲洗水流量〈20L／min，冲洗时间〈5min。以沉没度和产液量为参数编制了优化的加药量、加药周期表。采用优化加药方式后，全厂400余口加药油井检泵周期（197→271天）、热洗周期（44→54天）延长，泵效率增大（44．9％→50．1％）。图1表5参2。The production wells at the 1st Henan oil production factory are characterized by high wax conten, 25-45%, and very high watercut, 〉85%. To control wax precipitation, an allphatic amine initiated diblock copolyether, AE0604, as wax remover/inhibitor （WRI） is intrcx：luced into waxing wells through annulus in amount of 15.0-61.7 kg every 9.6-31.5 days. With submergence （S）, volume of fluids produced （VFP）, and WRI dce, age taken as variables in approximately 100 well-time WRI introducing trials, the WRI production curves are constructed, the lasting time of effective working concentration of WRI （EWC）, 20-200 mg/ kg, is determined and following results of trials are obtained： the peak of WRI production is sharp and appears in 50-20 hrs after WRI injected; the EWC maintains for 3-8 days and is influenced notably by S and less notably by VFP; the EWC lasting time can not be prolonged by the way of increasing WRI dosages; the downhole retention time of WRI is strongly influenced by water flush. A specification of downhole applying WRI is established： dosage 4-15 kg per well-time; interval between successive 2 injections 1-7 days; flow rate of flushing water〈20 L/min and flushing time 〈5 min. An optimized WRI injecting specification is formulated, oovering dosages and intervals between 2 injections at different S and VFP values. As a result of putting this optimized specification into practice on more than 400 production wells, an increase in pump reoonditioning intervals （from 197 to 271 day）, in hot water well washing intervals （from 44 to 54 days）, and in pump efficiency （from 44.9% to 50.1% ） are observed.

关 键 词：采油井 结蜡 清防蜡 清防蜡剂 加药方式 工艺参数 优化 高含水 河南油田 

分 类 号：TE358.2[石油与天然气工程—油气田开发工程] TE39