海上稠油油藏强化N_2泡沫调驱实验研究  

Experimental Study of Enhanced Nitrogen Foam on Oil Recovery in Offshore Viscous Oil Reservoirs

作　　者：刘延民 章杨[2] 王玉婷 王善堂[4] 任韶然 LIU Yan-min;ZHANG Yang;WANG Yu-ting;WANG Shan-tang;REN Shao-ran(School of Petroleum,China University of Petroleum, Qingdao 266580, P.R.China;Oil Production Technology Research Institute,PetroChina Dagang Oilfield, Tianjin 300280, P.R.China;Exploration and Development Institute, PetroChina Huabei Oilfield, Renqiu 062552, P.R.China;Research Institute of Petroleum Engineering, Sinopec Shengli Oilfield, Dongying 257000, P.R.China)

机构地区：[1]中国石油大学石油工程学院,青岛266580 [2]中国石油大港油田采油工艺研究院,天津300280 [3]中国石油华北油田勘探开发研究院,任丘062552 [4]中国石化胜利油田石油工程技术研究院,东营257000

出　　处：《科学技术与工程》2017年第29期80-87,共8页Science Technology and Engineering

摘　　要：采用新型PENF(polymer enhanced nitrogen foam)调驱技术,可有效提高非均质严重的海上稠油油藏采收率。实验采用三管并联模型,模拟非均质储集层,进行FAW(foam alternating water)调驱实验,分析非均质稠油油藏水驱低效原因,揭示PENF的EOR机理,并优化注入参数。结果表明,与常规泡沫相比,新型复配PENF体系极大增强了泡沫稳定性和调驱能力,更适用于非均质严重的海上稠油油藏;调驱过程体现"逐级堵调、依次动用",采用优化参数:多段塞、气液比1∶1及FAW注入方式,提高水驱驱油效率40%,达73.52%,有效提高采收率。Offshore heterogeneous heavy oil reservoirs cannot get expected results with conventional methods,while the new polymer enhanced nitrogen foam(PENF)technology can further increase the development effect.With three parallel sand-pack tubes model to simulate the interlayer heterogeneous reservoirs,foam alternating water flooding was tested.Reasons for low oil recovery of water flooding was elucidated and EOR mechanisms of enhanced nitrogen foam flooding was analyzed.Factors of PENF flooding were optimized at the same time.Results indicate that PENF enhanced conventional foams’stability and profile control and flooding ability,and had better adaptability for the heterogeneous heavy oil reservoirs.PENF blocked and developed heterogeneous reservoirs step by step and with small slugs of PENF system,gas liquid ratio of1∶1,and foam alternating water injection way,PENF can get better profile control and displacement efficiency of73.52%,which improved oil recovery of water flooding more than40%.The study provided the basis for the first successful implementation of foam flooding on offshore SZ heavy oil reservoir,which indicated a new way for the development of similar reservoirs.

关 键 词：海上稠油油藏 三管并联模型 非均质性 强化泡沫 机理分析 提高驱油效率 

分 类 号：TE345[石油与天然气工程—油气田开发工程]