摘要
新疆某稠油区块采用螺杆泵冷采的举升方式生产,井口温度约在20℃左右,开发初期,原油的表观黏度约为12000 mPa·s,远距离集输过程中,导致高回压甚至凝管,给油田生产带来极大困难。通过对国内外油田稠油冷采集输工艺及现状的调研,结合室内稠油掺水黏度转相点研究结果,确定了单井回掺热水降黏集输工艺,将掺水温度从35℃提高到55℃,不仅解决了油田稠油远距离管网集输的难题,而且与国内其他油田稠油蒸汽开发集输相比,掺水集输单井年节约费用5万元。
A heavy oil block in Xinjiang uses the lifting method of cold production with screw pump.The wellhead temperature is about 20℃.At the beginning of development,the apparent viscosity of crude oil is about 12000 mPa·s.During the long-distance gathering and transportation process,high back pressure,and even tube condensation bring great difficulties to oilfield production.Through the investigation of heavy oil cold production and transportation technology and current status in domestic and foreign oilfields,combined with the indoor research results of viscosity transition point of heavy oil mixed with water,the single well remixing hot water for the viscosity reduction in the gathering and transportation process is determined.The increase of mixing temperature from 35℃to 60℃not only solves the problem of long-distance pipeline network gathering and transportation of heavy oil in oil-fields,but also saves 50000 yuan per year for a single well of water-mixed gathering and transportation compared with heavy oil steam development gathering and transportation wells in other domestic oil-fields.
作者
严忠
倪丰平
周鹤
张玉敏
李志敏
YAN Zhong;NI Fengping;ZHOU He;ZHANG Yumin;LI Zhimin(Experimental Testing Institute of Xinjiang Oilfield Company,CNPC;Oil and Gas Field Environmental Protection and Energy Conservation Engineering Research Center,Xinjiang Uygur Autonomous Region;Luliang Oilfield Operation Area of Xinjiang Oilfield Company,CNPC;No.3 Drilling Branch Company of Bohai Drilling Engineering Co.,Ltd.,CNPC)
出处
《油气田地面工程》
2021年第8期21-25,共5页
Oil-Gas Field Surface Engineering
关键词
稠油冷采
掺水集输
原油处理
降黏
heavy oil cold production
water mixed gathering and transportation
crude oil treat-ment
viscosity reduction
