稠油热采不同开发技术潜力评价
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摘要
为评价中国石化不同稠油热采开发技术的潜力,针对蒸汽吞吐加密和蒸汽驱2种提高采收率技术,利用财务净现值、油藏数值模拟和成本分析法,绘制蒸汽吞吐单井经济极限产油量和蒸汽驱经济极限油汽比图版,建立了2种油藏埋深、2种井型蒸汽吞吐加密潜力评价标准,修订了蒸汽驱潜力评价标准,并以中国石化W油田为例开展实例应用。研究结果表明:当油藏埋深一定时,随着油价下降,无论是直井还是水平井,蒸汽吞吐单井经济极限产油量均呈指数增加;在油价为60美元/bbl时,中国石化稠油油藏蒸汽驱经济极限油汽比为0.096 t/t,W油田蒸汽吞吐加密和蒸汽吞吐直接转蒸汽驱新增可采储量分别为32.4×10~4和71.1×10~4t,总潜力为103.5×10~4t,当油价为80美元/bbl时,W油田总潜力为426.5×10~4t。同时,建议将水平井蒸汽驱潜力作为技术攻关潜力进行评价。
In order to evaluate the potential of different thermal-recovery technologies for heavy oil in SINOPEC,two EOR technologies,cyclic steam stimulation with infill wells and steam flooding,were studied. The methods of financial net present value,reservoir numerical simulation and cost analysis were used to draw the charts of single-well oil economic limit production of the cyclic steam stimulation and economic limit of oil-steam ratio for the steam flooding. And then the evaluation standards of the potential of cyclic steam stimulation with infill wells aimed at two kinds of buried depths and two kinds of well types were set up and the evaluation standards of the potential of steam flooding was revised. Finally,the potential was evaluated by taking W Oilfield of SINOPEC as an example. The results show that at a certain burial depth,single-well oil economic limit production of the cyclic steam stimulation increases exponentially as the oil price decreases for the vertical and the horizontal well. At the oil price of US$60/bbl,the economic limit of oil-steam ratio for the steam flooding in the heavy oil reservoirs of SINOPEC is 0.096 t/t. The cyclic steam stimulation with infill wells and the steam flooding directly after cyclic steam stimulation can increase 32.4×10~4 and 71.1×10~4 tons of recoverable reserves respectively,and the total potential of W Oilfield is 103.5×10~4 t. At the oil price of US$80/bbl,the total potential is 426.5×10~4 t for the W Oilfield. At the same time,it is suggested that the potential of steam flooding for the horizontal well should be evaluated as the potential of technological breakthrough.
In order to evaluate the potential of different thermal-recovery technologies for heavy oil in SINOPEC,two EOR technologies,cyclic steam stimulation with infill wells and steam flooding,were studied. The methods of financial net present value,reservoir numerical simulation and cost analysis were used to draw the charts of single-well oil economic limit production of the cyclic steam stimulation and economic limit of oil-steam ratio for the steam flooding. And then the evaluation standards of the potential of cyclic steam stimulation with infill wells aimed at two kinds of buried depths and two kinds of well types were set up and the evaluation standards of the potential of steam flooding was revised. Finally,the potential was evaluated by taking W Oilfield of SINOPEC as an example. The results show that at a certain burial depth,single-well oil economic limit production of the cyclic steam stimulation increases exponentially as the oil price decreases for the vertical and the horizontal well. At the oil price of US$60/bbl,the economic limit of oil-steam ratio for the steam flooding in the heavy oil reservoirs of SINOPEC is 0.096 t/t. The cyclic steam stimulation with infill wells and the steam flooding directly after cyclic steam stimulation can increase 32.4×10~4 and 71.1×10~4 tons of recoverable reserves respectively,and the total potential of W Oilfield is 103.5×10~4 t. At the oil price of US$80/bbl,the total potential is 426.5×10~4 t for the W Oilfield. At the same time,it is suggested that the potential of steam flooding for the horizontal well should be evaluated as the potential of technological breakthrough.
引文
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[7]侯春华.胜利油区不同类型油藏调整挖潜技术措施与实施效果[J].油气地质与采收率,2006,13(4):74-76.HOU Chunhua.Technology and measure for adjustment and tapping the potential and their effect in various types of oil reservoir in Shengli petroliferous province[J].Petroleum Geology and Recovery Efficiency,2006,13(4):74-76.
[8]束青林,王宏,孙建芳.孤岛油田稠油油藏高轮次吞吐后提高采收率技术研究与实践[J].油气地质与采收率,2010,17(6):61-64.SHU Qinglin,WANG Hong,SUN Jianfang.Study and practice of EOR after multiple steam stimulation in Gudao heavy oil field[J].Petroleum Geology and Recovery Efficiency,2010,17(6):61-64.
[9]马玉霞,崔连训,刘新福.稠油热采老区蒸汽吞吐井经济极限累积产量关系式研究[J].河南石油,2002,16(5):16-18.MA Yuxia,CUI Lianxun,LIU Xinfu.A study on formula of economic limit cumulative production of huff and puff heavy oil wells in old thermal recovery blocks[J].Henan Petroleum,2002,16(5):16-18.
[10]侯健,高达,孙建芳,等.稠油油藏不同热采开发方式经济技术界限[J].中国石油大学学报:自然科学版,2009,33(6):66-70.HOU Jian,GAO Da,SUN Jianfang,et al.Economic and technical boundary values of different thermal recovery methods in heavy oil reservoir development[J].Journal of China University of Petroleum:Edition of Natural Sciences,2009,33(6):66-70.
[2]赵燕,吴光焕,孙业恒.泡沫辅助蒸汽驱矿场试验及效果[J].油气地质与采收率,2017,24(5):106-110.ZHAO Yan,WU Guanghuan,SUN Yeheng.Field test and effect analysis of foam-assisted steam flooding[J].Petroleum Geology and Recovery Efficiency,2017,24(5):106-110.
[3]王传飞,吴光焕,韦涛,等.薄层特超稠油油藏氮气与降粘剂联合蒸汽辅助重力泄油物理模拟实验[J].油气地质与采收率,2017,24(1):80-85.WANG Chuanfei,WU Guanghuan,WEI Tao,et al.Physical simulation experiment of nitrogen gas and dissolve solvent aided SAGD for thin formation and extra-super heavy oil reservoir[J].Petroleum Geology and Recovery Efficiency,2017,24(1):80-85.
[4]明玉坤.烟道气强化蒸汽驱提高稠油油藏采收率实验[J].大庆石油地质与开发,2017,36(3):100-105.MING Yukun.EOR experiment of the heavy oil reservoir by the tunnel gas enhanced steam flooding[J].Petroleum Geology&Oilfield Development in Daqing,2017,36(3):100-105.
[5]吴正彬,刘慧卿,庞占喜,等.稠油氮气泡沫辅助蒸汽驱可视化实验研究[J].特种油气藏,2016,23(5):126-129.WU Zhengbin,LIU Huiqing,PANG Zhanxi,et al.Visualization experiment of nitrogen foam assisted steam-flooding in heavy-oil reservoir[J].Special Oil&Gas Reservoirs,2016,23(5):126-129.
[6]孙建芳,邱国清,吴光焕.胜利油区稠油蒸汽吞吐开采井网加密技术经济界限评价方法[J].特种油气藏,2002,9(2):47-49.SUN Jianfang,QIU Guoqing,WU Guanghuan.Economic limit evaluation of infill technology for cyclic steam stimulation in Shengli oil province[J].Special Oil&Gas Reservoirs,2002,9(2):47-49.
[7]侯春华.胜利油区不同类型油藏调整挖潜技术措施与实施效果[J].油气地质与采收率,2006,13(4):74-76.HOU Chunhua.Technology and measure for adjustment and tapping the potential and their effect in various types of oil reservoir in Shengli petroliferous province[J].Petroleum Geology and Recovery Efficiency,2006,13(4):74-76.
[8]束青林,王宏,孙建芳.孤岛油田稠油油藏高轮次吞吐后提高采收率技术研究与实践[J].油气地质与采收率,2010,17(6):61-64.SHU Qinglin,WANG Hong,SUN Jianfang.Study and practice of EOR after multiple steam stimulation in Gudao heavy oil field[J].Petroleum Geology and Recovery Efficiency,2010,17(6):61-64.
[9]马玉霞,崔连训,刘新福.稠油热采老区蒸汽吞吐井经济极限累积产量关系式研究[J].河南石油,2002,16(5):16-18.MA Yuxia,CUI Lianxun,LIU Xinfu.A study on formula of economic limit cumulative production of huff and puff heavy oil wells in old thermal recovery blocks[J].Henan Petroleum,2002,16(5):16-18.
[10]侯健,高达,孙建芳,等.稠油油藏不同热采开发方式经济技术界限[J].中国石油大学学报:自然科学版,2009,33(6):66-70.HOU Jian,GAO Da,SUN Jianfang,et al.Economic and technical boundary values of different thermal recovery methods in heavy oil reservoir development[J].Journal of China University of Petroleum:Edition of Natural Sciences,2009,33(6):66-70.