轻质油油井沥青质沉淀清除作业.pdf

第37卷第5期
Vol 37 No, 5
2015年9月
L DRILLNG& PRODUCTIONTECHNOLOGY
Sept. 2015
文章编号:10007393(2015)05011303
doi:10.136391.odpt.2015.05.028
轻质油油井沥青质沉淀清除作业
董涛王海涛高巧娟2
(1.中石化国际石油劫探开发公司伊期公司,北京100029;2.北京石油机械厂,北京100083
引用格式:董涛,王海涛,高巧媚.轻质油油井沥青质沉淀淸除作业「J1.石油钻采工艺,2015,375):113-115
摘要:两伊边界轻质油油田主カ产层A油組在生产过程中,沥青质在井筒析出、沉淀的现象很严重,是无水开采阶段影响
油井生产时率的主要因素之一。A油组异常高压,地层原油中高含硫化氢,所以整个作业过程,油管和油套环空之间不允许建
立循环,这些都给井筒沥青质沉淀清除エ作带来了很大困难。本次施工先采用泵车小排量控压、分段挤入、分段浸泡以及分段
返排的工艺,挤入过程中井筒被沥青沉淀堵死,之后改用连续油管通洗井和泵车小排量控压挤入与浸泡相結合的工艺,顺利完
成作业,使油井恢复正常生产。本次作业历时5d,现场施工过程艰难复杂,通过作业认识到高效的沥青质沉滨溶剂、连鉷油管
通洗、泵车控压控排量挤入、浸泡时间和浸泡深度几方面紧密配合是倸迁施工成功的关键
关键词:连续油管;沥青质;异常高压;硫化氢;井下作业;沥青质沉淀溶剂
中图分类号:TE358
文献标识码:B
Cleanup operation of asphaltene precipit ation in light oil wells
DONG Ta0, WANG Haitao, GA0 Qiaojuan
( 1. ran Comany Internationa P leum oration 1 duction Co, S /NO C Beijing 100029, hin
2. Beiiing Petroleum Machinery Factory, Beijing 100083, China
Abstract: During production of the maor productive /onc-il Reservoir A in light oil oilfield closc to Iran and Iraq borders
sphaltene precipitation and settling in wellbore is a severe problems and is one of the factors which affect the production time efficiency
of oil wells in water-ircc production period. Ihe Oil Rcscrvoir A has anomalously high pressure and formation crude oil contains large
amount of hydrogen sulphide( H, S ), so no circulation should be established between the tubing and casing annulus during the operation
proccss. All these factors posc great difficuly for removing the asphaltene precipitation on welbore. In this job, the pumping unit
was firstly used to control the pressure with small displacement, squeeze in fluid in stages and soak in stages and flow back in stages
Durig squeezing, the wellbore was fully blocked by asphaltene precipitation. Then coiled tubing was used to drift and wash the well
in conjunction with controlling the pressure by pumping unit with small displacement and soaking. I'he job was completed successfull
and the oill well resumed normal production. This job lasted 5 days and experienced very difficult and complex times. From the job, it
is earned that close combination of efficient asphaltene precipitation solvent, drifting by coiled tubing, squeezing by pumping unit with
controlled pressure and displacement, soaking duration and soaking depth is the key to the success of the job
Key words: coiled tubing; asphaltene; abnormal high pressure; IL S; downhole opcralion; asphaltene prccipilalion solvcnt
对于两伊边界油出A油组的油井,沥青质沉淀管通洗井作业是比较有效的方式,能够保证作业之
堵塞井筒和油嘴是影响油正常生产的主要因素之后油井产量迅速恢复,每次作业后油井能够维持2
在该油出,沥青质沉淀防治技术的基础是建立个月的正常生产时间。
在沥青质在筒析出、沉淀规律的研究之上的,目前
主要是通过连续油管作业和井底注入青质分散剂1A2井基本概况
两种方法来防治沥青质沉淀。就效果而言,连续油
A2是位于油田北部高点的直小生产井,2010
作者简介:董涛,1978年生。2009毕业于中国石油大学(北京)石油天然气工程学院油气田开发专业,获硕士学位,现从事海外油田增
井下作业工作。电话:010-69165531-mai:dongtao329163.com