底水油藏多分支井见水时间影响因素
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摘要
在多分支井开发底水油藏的过程中,油井见水是不可避免的,而见水后对含水率的控制十分困难,因此延长见水时间极其重要。但目前针对多分支井见水规律的研究却是空白。利用数值模拟方法,得到见水时间与相关参数之间的关系,为调整参数延长见水时间提供理论依据。实验结果表明,见水时间与多分支井避水高度、单井控制面积、井下夹层、油藏水平渗透率及多分支井的分支长度、分支角度和分支数目等参数成正相关性;而与生产压差、产液量、油藏垂向渗透率和油水粘度比等参数之间成负相关性。对鱼骨井与辐射式多分支井开发的底水油藏水脊形态的研究表明:鱼骨井主要见水点为主井筒与分支交会处,水体呈与分支形态相关的山脊状向上推进,因此分支与主井筒的交会处是须重点防范底水突进的位置;而辐射式多分支井的井跟比井趾处见水要早,第1见水点为分支的交会点,而且是点状见水,然后迅速变为面状见水,水体呈与分支形态相关的山脊状向上推进,因此与鱼骨井不同,井跟处是须重点防范底水突进的位置。
The occurrence of water breakthrough is inevitable in the development process of bottom water reservoirs,and it is difficult to control the water cut after water breakthrough for the multilateral wells. Therefore,it has great importance to prolong the water breakthrough time. There are a few studies on the water breakthrough laws for the horizontal wells,but no studies for the multilateral wells. Relationship between the water breakthrough time and related parameters was obtained by numerical simulation so as to provide theoretical foundation for parameter adjustment and longer water breakthrough time.Experiment results indicate that the water breakthrough time has positive correlation with the water avoidance height,the control area for single well,the area and position of interlayer,the horizontal permeability and the three multilateral well parameters including branch length,branch angle and branch number. On the other hand,the water breakthrough time has negative correlation with the pressure difference,the fluid production rate,the vertical permeability and the ratio of oil and water. The observation of the water ridge morphology of the bottom water reservoir developed by herringbone wells and radial multilateral wells indicates that the main water breakthrough point of the herringbone well is at the intersection of the main wellbore and the branches,and the shape of the water ridge is related to the shape of the branch. So the intersection may be the position of bottom water breakthrough. The heel of the radial multilateral well may has earlier water breakthrough than the toe. While the first water breakthrough point for the radial multilateral well is the intersection of the branches,and punctiform water breakthrough occurs at first,followed by the planar water breakthrough. The shape of the water ridge is related to the shape of the branch. Therefore,the position of water breakthrough is at the heel of the radial multilateral well,which is different from that in the herringbone well.
The occurrence of water breakthrough is inevitable in the development process of bottom water reservoirs,and it is difficult to control the water cut after water breakthrough for the multilateral wells. Therefore,it has great importance to prolong the water breakthrough time. There are a few studies on the water breakthrough laws for the horizontal wells,but no studies for the multilateral wells. Relationship between the water breakthrough time and related parameters was obtained by numerical simulation so as to provide theoretical foundation for parameter adjustment and longer water breakthrough time.Experiment results indicate that the water breakthrough time has positive correlation with the water avoidance height,the control area for single well,the area and position of interlayer,the horizontal permeability and the three multilateral well parameters including branch length,branch angle and branch number. On the other hand,the water breakthrough time has negative correlation with the pressure difference,the fluid production rate,the vertical permeability and the ratio of oil and water. The observation of the water ridge morphology of the bottom water reservoir developed by herringbone wells and radial multilateral wells indicates that the main water breakthrough point of the herringbone well is at the intersection of the main wellbore and the branches,and the shape of the water ridge is related to the shape of the branch. So the intersection may be the position of bottom water breakthrough. The heel of the radial multilateral well may has earlier water breakthrough than the toe. While the first water breakthrough point for the radial multilateral well is the intersection of the branches,and punctiform water breakthrough occurs at first,followed by the planar water breakthrough. The shape of the water ridge is related to the shape of the branch. Therefore,the position of water breakthrough is at the heel of the radial multilateral well,which is different from that in the herringbone well.
引文
[1]孙宝江,张振楠.南海深水钻井完井主要挑战与对策[J].石油钻探技术,2015,43(4):1-7.Sun Baojiang,Zhang Zhennan.Challenges and countermeasures for the drilling and completion of deepwater wells in the South China Sea[J].Petroleum Drilling Techniques,2015,43(4):1-7.
[2]张世明,许强,周英杰,等.鱼骨状分支水平井注采井网研究[J].新疆石油地质,2009,30(1):92-95.Zhang Shiming,Xu Qiang,Zhou Yingjie,et al.Study of injectionproduction well patterns for herringbone branch horizontal well[J].Xinjiang Petroleum Geology,2009,30(1):92-95.
[3]Retnanto A,Frick T P,Brand C W,et al.Optimal configurations of multiple-lateral horizontal wells[C]//SPE Western Regional Meeting.Anchorage:Alaska Publication,1996.
[4]刘想平,张兆顺,崔桂香,等.鱼骨型多分支井向井流动态关系[J].石油学报,2000,21(6):57-60.Liu Xiangping,Zhang Zhaoshun,Cui Guixiang,et al.Inflow performance relationship of a herringbone multilateral well[J].Acta Petrolei Sinica,2000,21(6):57-60.
[5]陈元千.辐射状分支水平井产能公式研究进展[J].特种油气藏,2014,21(1):1-6.Chen Yuanqian.Progress of research on productivity forecasting formula for radial multi-lateral horizontal wells[J].Special Oil&Gas Reservoirs,2014,21(1):1-6.
[6]党胜国,冯鑫,闫建丽,等.夹层研究在水平井开发厚层底水油藏中的应用——以曹妃甸11-6油田Massive砂体为例[J].油气地质与采收率,2015,22(1):63-67.Dang Shengguo,Feng Xin,Yan Jianli,et al.Interlayer research application in horizontal well development of thick bottom water reservoir-a case of Massive sand in Caofeidian11-6 oilfield[J].Petroleum Geology and Recovery Efficiency,2015,22(1):63-67.
[7]宋文广,江琼琴,李疾翎,等.水平井同倾斜角度产液剖面计算模型[J].石油与天然气地质,2015,36(4):688-694.Song Wenguang,Jiang Qiongqin,Li Jiling,et al.Equal-tilt-angle production profile calculation model of horizontal wells[J].Oil&Gas Geology,2015,36(4):688-694.
[8]王欢,廖新维,赵晓亮,等.超低渗透油藏分段多簇压裂水平井产能影响因素与渗流规律——以鄂尔多斯盆地长8超低渗透油藏为例[J].油气地质与采收率,2014,21(6):107-110.Wang Huan,Liao Xinwei,Zhao Xiaoliang,et al.A study on productivity and flow regimes of segmented multi-cluster fractured horizontal well in ultra-low permeability reservoir-a case of Chang8 ultra-low permeability reservoir in Ordos Basin[J].Petroleum Geology and Recovery Efficiency,2014,21(6):107-110.
[9]孙彦春,王群会,张雷,等.底水油藏水平井出水位置识别方法[J].特种油气藏,2014,21(6):109-111.Sun Yanchun,Wang Qunhui,Zhang Lei,et al.Water-breakthrough interval identification in bottom-water oil reservoirs[J].Special Oil&Gas Reservoirs,2014,21(6):109-111.
[10]任广磊,周涌沂,陈奎,等.大牛地气田大98井区水平井开发技术政策研究[J].油气地质与采收率,2014,21(5):90-93.Ren Guanglei,Zhou Yongyi,Chen Kui,et al.Research on horizontal well development technology policy of Da98 well area in Daniudi gas field[J].Petroleum Geology and Recovery Efficiency,2014,21(5):90-93.
[11]王庆,刘慧卿,李华锋,等.底水油藏水平井见水时间影响因素研究[J].油气田地面工程,2010,29(9):6-7.Wang Qing,Liu Huiqing,Li Huafeng,et al.Influencing factor of water breakthrough time for horizontal wells in bottom water reservoirs[J].Oil-Gas Field Surface Engineering,2010,29(9):6-7.
[2]张世明,许强,周英杰,等.鱼骨状分支水平井注采井网研究[J].新疆石油地质,2009,30(1):92-95.Zhang Shiming,Xu Qiang,Zhou Yingjie,et al.Study of injectionproduction well patterns for herringbone branch horizontal well[J].Xinjiang Petroleum Geology,2009,30(1):92-95.
[3]Retnanto A,Frick T P,Brand C W,et al.Optimal configurations of multiple-lateral horizontal wells[C]//SPE Western Regional Meeting.Anchorage:Alaska Publication,1996.
[4]刘想平,张兆顺,崔桂香,等.鱼骨型多分支井向井流动态关系[J].石油学报,2000,21(6):57-60.Liu Xiangping,Zhang Zhaoshun,Cui Guixiang,et al.Inflow performance relationship of a herringbone multilateral well[J].Acta Petrolei Sinica,2000,21(6):57-60.
[5]陈元千.辐射状分支水平井产能公式研究进展[J].特种油气藏,2014,21(1):1-6.Chen Yuanqian.Progress of research on productivity forecasting formula for radial multi-lateral horizontal wells[J].Special Oil&Gas Reservoirs,2014,21(1):1-6.
[6]党胜国,冯鑫,闫建丽,等.夹层研究在水平井开发厚层底水油藏中的应用——以曹妃甸11-6油田Massive砂体为例[J].油气地质与采收率,2015,22(1):63-67.Dang Shengguo,Feng Xin,Yan Jianli,et al.Interlayer research application in horizontal well development of thick bottom water reservoir-a case of Massive sand in Caofeidian11-6 oilfield[J].Petroleum Geology and Recovery Efficiency,2015,22(1):63-67.
[7]宋文广,江琼琴,李疾翎,等.水平井同倾斜角度产液剖面计算模型[J].石油与天然气地质,2015,36(4):688-694.Song Wenguang,Jiang Qiongqin,Li Jiling,et al.Equal-tilt-angle production profile calculation model of horizontal wells[J].Oil&Gas Geology,2015,36(4):688-694.
[8]王欢,廖新维,赵晓亮,等.超低渗透油藏分段多簇压裂水平井产能影响因素与渗流规律——以鄂尔多斯盆地长8超低渗透油藏为例[J].油气地质与采收率,2014,21(6):107-110.Wang Huan,Liao Xinwei,Zhao Xiaoliang,et al.A study on productivity and flow regimes of segmented multi-cluster fractured horizontal well in ultra-low permeability reservoir-a case of Chang8 ultra-low permeability reservoir in Ordos Basin[J].Petroleum Geology and Recovery Efficiency,2014,21(6):107-110.
[9]孙彦春,王群会,张雷,等.底水油藏水平井出水位置识别方法[J].特种油气藏,2014,21(6):109-111.Sun Yanchun,Wang Qunhui,Zhang Lei,et al.Water-breakthrough interval identification in bottom-water oil reservoirs[J].Special Oil&Gas Reservoirs,2014,21(6):109-111.
[10]任广磊,周涌沂,陈奎,等.大牛地气田大98井区水平井开发技术政策研究[J].油气地质与采收率,2014,21(5):90-93.Ren Guanglei,Zhou Yongyi,Chen Kui,et al.Research on horizontal well development technology policy of Da98 well area in Daniudi gas field[J].Petroleum Geology and Recovery Efficiency,2014,21(5):90-93.
[11]王庆,刘慧卿,李华锋,等.底水油藏水平井见水时间影响因素研究[J].油气田地面工程,2010,29(9):6-7.Wang Qing,Liu Huiqing,Li Huafeng,et al.Influencing factor of water breakthrough time for horizontal wells in bottom water reservoirs[J].Oil-Gas Field Surface Engineering,2010,29(9):6-7.