复杂断块油藏高含水期化学剂强化CO_2复合驱提高采收率技术
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摘要
苏北盆地洲城油田垛一段油藏含油面积小、储层分散、储量丰度低,目前处于注水开发的中后期,剩余油的量化表征及有效挖潜技术优选成为油田深度开发阶段核心工作。以高含水开发阶段复杂断块油藏剩余油挖潜及提高原油最终采收率为目标,开发了化学剂强化CO_2复合驱提高采收率技术体系(Chemicals&Carbon-dioxide,2C复合驱)。室内实验及数值模拟研究表明,水驱后注入洗油剂较大幅度降低流体界面张力,显著提高波及范围内残余油驱油效率,通过段塞式注入的CO_2的超覆作用,携带洗油剂对正韵律含油砂体高部位有效波及,改善垂向剩余油驱替效果。2C复合驱油体系通过耦合化学剂原油降黏及CO_2超覆作用扩大波及双重优势,实现高含水期驱油效率及纵向波及系数的同时提高,显著提高了原油最终采收率。
The Zhoucheng Oilfield Duo I Formation, a oil-bearing reservoir area is small, scattered, low abundance of reserves, is currently in the water development in the late, residual oil quantitative characterization and effective excavation technology optimization has become the core depth stage of oilfield development. A integrated innovation of chemical flooding technology to improve the system of enhanced CO_2 recovery(Chemicals & Carbon-dioxide, 2 C). Study on laboratory experiment and numerical simulation show that after water flooding into the washing agent greatly reduce surface tension, improve sweep range of residual oil displacement efficiency, overlap by injection of CO_2, carry on the washing agent positive rhythm oil sand body high part of the effective spread, improve the vertical displacement of residual oil for effect. 2 C technology system coupling chemical oil by viscosity and CO_2 overlap expand spread the advantages of achieving high water cut period of oil displacement efficiency and the vertical sweep coefficient increase, significantly improve the ultimate oil recovery.
The Zhoucheng Oilfield Duo I Formation, a oil-bearing reservoir area is small, scattered, low abundance of reserves, is currently in the water development in the late, residual oil quantitative characterization and effective excavation technology optimization has become the core depth stage of oilfield development. A integrated innovation of chemical flooding technology to improve the system of enhanced CO_2 recovery(Chemicals & Carbon-dioxide, 2 C). Study on laboratory experiment and numerical simulation show that after water flooding into the washing agent greatly reduce surface tension, improve sweep range of residual oil displacement efficiency, overlap by injection of CO_2, carry on the washing agent positive rhythm oil sand body high part of the effective spread, improve the vertical displacement of residual oil for effect. 2 C technology system coupling chemical oil by viscosity and CO_2 overlap expand spread the advantages of achieving high water cut period of oil displacement efficiency and the vertical sweep coefficient increase, significantly improve the ultimate oil recovery.
引文
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[2]周浩.苏北复杂小断块油田提高采收率技术应用研究[J].中外能源,2013,9(18):31-35.ZHOU Jie.Application and research of EOR in small complex fault block of north Jiangsu oilfield[J].SINO-GLOBAL ENERGY,2013,18(9):31-35.
[3]LIU Wei,ZHOU Liqin.The comprehensive determination technique and application of remaining oil in complex miniature fault block reservoir[R].SPE 64649.
[4]张备,唐建信,程汉东,秦学成,丁静.洲城油田表面活性剂驱提高采收率矿场试验[J].西南石油大学学报(自然科学版),2005,27(6):53-56.ZHANG Bei,TANG Jianxin,CHEN Handong,QINXuecheng,DING Jing.Field tests of enhancing recovery by surfactant flooding in the Zhoucheng Oilfield[J].Journal of Southwest Petroleum Institute(Edition of Natural Science).2005,27(6):53-56.
[5]HAN Jinju,PARK Hyemin,SUNG Wonmo.Effect of gravity segregation on CO2 sequestration and oil production during CO2 flooding[J].Energies,2016(161):85-91.
[6]王凤清,姚同玉,李继山.润湿性反转剂的微观渗流机理[J].石油钻采工艺,2006,28(2):40-42.WANG Fengqing,YAO Tongyu,LI Jishan.Microscopic porous flow mechanics of wetting alteration agents[J].Oil Drilling&Production,2006,28(2):40-42.
[7]贾忠伟,杨清彦,侯战捷,袁敏,周浩.油水界面张力对三元复合驱驱油效果影响的实验研究[J].大庆石油地质与开发,2005,24(5):79-81.JIA Zhongwei,YANG Qingyan,HOU Zhanjie,YUANMin,ZHOU Hao.Effect of interfacial tension on experimental results of ASP flooding[J].Petroleum Geology&Oilfield Development in Daqing,2005,24(5):79-81.
[8]宋传真,林长志,王元庆,曹丽丽.低渗稠油油藏蒸汽CO2化学剂复合吞吐研究[J].成都理工大学学报(自然科学版),2016,43(3):336-343.SONG Chuanzhen,LIN Changzhi,WANG Yuanqing,CAO Lili.Study on composite steam stimulation with carbon dioxide and chemical agents of low permeability heavy oil reservoir[J].Journal Of Chengdu University of Technology(Edition of Natural Science),2016,43(3):336-343.
[9]张凤英,李建波,诸林,诸林,杨光.稠油油溶性降粘剂MASM的合成及室内评价[J].精细石油化工进展,2005,6(12):5-7.ZHANG Fengying,LI Jianbo,CHU Lin,ZHU Lin,YANG Guang.Preparation and laboratory evaluation of oil-soluble viscosity reducer MASM for viscous crude oil[J].Advances in Fine Petrochemicals,2005,6(12):5-7.(下转第670页)
[10]陶磊,李兆敏,毕义泉,李宾飞,张继国.胜利油田深薄层超稠油多元复合开采技术[J].石油勘探与开发,2010,37(6):732-736.TAO Lei,LI Zhaomin,BI Yiquan,LI Binfei,ZHANGJiguo.Multi-combination exploiting technique of ultraheavy oil reservoirs with deep and thin layers in Shengli Oilfield[J].Petroleum Exploration and Development.2010,37(6):732-736.
[11]骆铭,王海涛,吕成远,伦增珉,张莉,何应付.泡沫剂/驱油剂辅助蒸汽驱技术室内实验[J].应用化工,2015(11):1988-1991.LUO Ming,WANG Haitao,LYU Chengyuan,LUNZengmin,ZHANG Li,HE Yingfu.Experimental study on injection of alkylbenzene sulfonate surfactant and foam agent during steam flooding[J].Applied Chemical Industry,2015(11):1988-1991.
[12]李兆敏,鹿腾,陶磊,李宾飞,张继国,李敬.超稠油水平井CO2与降黏剂辅助蒸汽吞吐技术[J].石油勘探与开发,2011,38(5):600-605.LI Zhaomin,LU Teng,TAO Lei,LI Binfei,ZHANGJiguo,LI Jing.CO2 and viscosity breaker assisted steam huff and puff technology for horizontal wells in a superheavy oil reservoir[J].Petroleum Exploration and Development,2011,38(5):600-605.