气顶边水窄油环水平井生产压差调控实验研究
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摘要
为了解生产压差调控策略对气顶边水窄油环开发效果的影响规律,提高该类油藏的采出程度,以海上某气顶边水窄油环为原型,根据相似准则设计了大型三维物理模型,进行了水平井生产压差不同调整时机和调整方式的生产实验,分析了生产压差调整时机和调整方式对气顶边水窄油环开发效果的影响。结果表明:水平井气窜后增大生产压差,采出程度从28.32%提高至约40.00%;气窜持续一段时间后增大生产压差要优于刚发生气窜时就增大生产压差,采出程度可提高2.09%;单阶梯增大生产压差方式的开发效果要优于多阶梯增大生产压差方式,采出程度可提高2.47%。研究表明,气顶边水窄油环气窜后生产一段时间再单阶梯增大生产压差,是提高该类油藏采出程度的最优策略。海上某大气顶边水窄油环采用该生产压差调整策略调整生产压差,增油效果显著。
To better understand the influence of draw-down pressure control strategy on the development result of gas-cap/edge water narrow oil rim, and to improve the recovery percentage of such reservoirs, a large-scale threedimensional physical model was designed by taking an offshore gas-cap/edge water narrow oil rim as the prototype on the basis of similarity criteria. Production experiments on the different adjustment timing and adjustment modes of horizontal well draw-down pressure were conducted, and the influence of those adjustments on the development results of gas-cap/edge water narrow oil rim was analyzed. The results showed that the draw-down pressure increased after gas channeling in the horizontal wells, and the recovery percentage increased from 28.32% to about 40.00%. When gas channeling lasts for a period of time, the recovery percentage from draw-down pressure increase was better than that when gas channeling occurs instantly, and the recovery percentage can increase by 2.09%; In addition, the development result from draw-down pressure increase in single step mode is better than that in multi-step mode, and the recovery percent can increase by 2.47%. The research results showed that draw-down pressure increase in single step after gas channeling lasts for a period of time is the best strategy to improve the recovery percentage of this type of reservoir.This pressure draw-down adjustment strategy has been applied in an offshore gas-cap/edge water narrow oil rim, and oil production increase is remarkable.
To better understand the influence of draw-down pressure control strategy on the development result of gas-cap/edge water narrow oil rim, and to improve the recovery percentage of such reservoirs, a large-scale threedimensional physical model was designed by taking an offshore gas-cap/edge water narrow oil rim as the prototype on the basis of similarity criteria. Production experiments on the different adjustment timing and adjustment modes of horizontal well draw-down pressure were conducted, and the influence of those adjustments on the development results of gas-cap/edge water narrow oil rim was analyzed. The results showed that the draw-down pressure increased after gas channeling in the horizontal wells, and the recovery percentage increased from 28.32% to about 40.00%. When gas channeling lasts for a period of time, the recovery percentage from draw-down pressure increase was better than that when gas channeling occurs instantly, and the recovery percentage can increase by 2.09%; In addition, the development result from draw-down pressure increase in single step mode is better than that in multi-step mode, and the recovery percent can increase by 2.47%. The research results showed that draw-down pressure increase in single step after gas channeling lasts for a period of time is the best strategy to improve the recovery percentage of this type of reservoir.This pressure draw-down adjustment strategy has been applied in an offshore gas-cap/edge water narrow oil rim, and oil production increase is remarkable.
引文
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[4]马时刚,李清瑶.带油环边水气藏水平井开发优化设计[J].断块油气田,2014,21(4):480-482.MA Shigang,LI Qingyao.Optimization design of horizontal well development for edge water gas reservoir with oil ring[J].FaultBlock Oil&Gas Field,2014,21(4):480-482.
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[9]杨庆红,童凯军,张迎春,等.利用水平井开发大气顶窄油环油藏研究与实践[J].中国海上油气,2011,23(5):313-317.YANG Qinghong,TONG Kaijun,ZHANG Yingchun,et al.A study on horizontal-well development of reservoirs with big gas cap and narrow oil rim and its practice[J].China Offshore Oil and Gas,2011,23(5):313-317.
[10]van der HARST A C.Erb West:an oil rim development with horizontal wells[R].SPE 22994,1991.
[11]CHAN K S,MASOUDI R,KARKOOTI H,et al.Smart horizontal well drilling and completion for effective development of thin oilrim reservoirs in Malaysia[R].IPTC 17753,2014.
[12]WEBER K J,KLOOTWIJK P H,KONIECZEK J,et al.Simulation of water injection in a barrier-bar-type,oil-rim reservoir in Nigeria[R].SPE 6702,1978.
[13]刘佳,程林松,范子菲,等.气顶油环协同开发下油气界面运移规律研究[J].西南石油大学学报(自然科学版),2015,37(5):99-105.LIU Jia,CHENG Linsong,FAN Zifei,et al.Experimental studies on oil and gas coordinated development mechanism of oil rim reservoirs[J].Journal of Southwest Petroleum University(Science&Technology Edition),2015,37(5):99-105.
[14]ONWUKWE S.I,OBAH B,CHUKWU G.A,et al.A model approach of controlling coning in oil rim reservoirs[R].SPE163039,2012.
[15]KOLBIKOV S V.Peculiarities of thin oil rim development[R].SPE160678,2012.
[16]NENNIE E,SAVANKO S,ALBERTS G J N,et al.Comparing the benefits:use of various wellhead gas coning control strategies to optimize production of a thin oil rim[R].SPE 125050,2009.
[17]El GAZAR A L,ALKLIH M Y,SUMAIDAA S A B,et al.Field development and optimization plan for compartmentalized oil rim reservoir[R].SPE 177659,2015.
[18]RAZAK E A,CHAN K S,DARMAN N B,et al.Breaking oil recovery limit in malaysian thin oil rim reservoirs:Force Balance Revisited[R].SPE 130338,2010.
[19]祝晓林,张迎春,王月杰,等.渤海S油田厚稠窄边底水油藏水平井合理生产压差研究[J].石油地质与工程,2012,26(1):26-28,32.ZHU Xiaolin,ZHANG Yingchun,WANG Yuejie,et al.Research on reasonable production pressure of horizontal well in edge and bottom water reservoir of Bohai S Oilfield[J].Petroleum Geology and Engineering,2012,26(1):26-28,32.
[20]LI Tingli,GE Lizhen,ZHAO Chunming,et al.Research for horizontal well reasonable drawdown pressure of heavy oil reservoir with bottom water[R].SPE 136730,2010.
[21]OMEKE J E,LIVINUS A,UCHE I N,et al.A proposed cone breakthrough time model for horizontal wells in thin oil rim reservoirs[R].SPE 170743,2010.
[2]童凯军,赵春明,张迎春,等.大气顶窄油环油藏屏障注水开发技术适应性研究:以渤海锦州25-1南油田Es3-I油藏为例[J].天然气地球科学,2011,22(3):566-570.TONG Kaijun,ZHAO Chunming,ZHANG Yingchun,et al.Adaptability and development suggestion of barrier water flooding for reservoir with big gas cap and thin oil ring[J].Natural Gas Geoscience,2011,22(3):566-570.
[3]余忠,赵会杰,李卫京,等.正确选择气顶油藏高效开发模式[J].石油勘探与开发,2003,30(2):70-72.YU Zhong,ZHAO Huijie,LI Weijing,et al.Optimization of development scheme for gas-cap reservoir[J].Petroleum Exploration and Development,2003,30(2):70-72.
[4]马时刚,李清瑶.带油环边水气藏水平井开发优化设计[J].断块油气田,2014,21(4):480-482.MA Shigang,LI Qingyao.Optimization design of horizontal well development for edge water gas reservoir with oil ring[J].FaultBlock Oil&Gas Field,2014,21(4):480-482.
[5]KARTOATMODJO G P,BAHRI C,BADAWY A M,et al.Optimizing horizontal well placement and reservoir inflow in thin oil rim improves recovery and extends the life of an aging field[R].SPE 122338,2009.
[6]IYARE U C,SILVA J K M.Effect of gas cap and aquifer strength on optimal well location for thin-oil rim reservoirs[R].SPE 158544,2012.
[7]杨国绪.双台子气顶砂岩油藏[M].北京:石油工业出版社,1997:103-104.YANG Guoxu.Shuangtaizi gas cap sandstone reservoir[M].Beijing:Petroleum Industry Press,1997:103-104.
[8]姚约东,李相方.气顶油气田开发程序的探讨[J].天然气工业,2005,25(2):124-126.YAO Yuedong,LI Xiangfang.Discussion on development programs of gas-cap reservoirs[J].Natural Gas Industry,2005,25(2):124-126.
[9]杨庆红,童凯军,张迎春,等.利用水平井开发大气顶窄油环油藏研究与实践[J].中国海上油气,2011,23(5):313-317.YANG Qinghong,TONG Kaijun,ZHANG Yingchun,et al.A study on horizontal-well development of reservoirs with big gas cap and narrow oil rim and its practice[J].China Offshore Oil and Gas,2011,23(5):313-317.
[10]van der HARST A C.Erb West:an oil rim development with horizontal wells[R].SPE 22994,1991.
[11]CHAN K S,MASOUDI R,KARKOOTI H,et al.Smart horizontal well drilling and completion for effective development of thin oilrim reservoirs in Malaysia[R].IPTC 17753,2014.
[12]WEBER K J,KLOOTWIJK P H,KONIECZEK J,et al.Simulation of water injection in a barrier-bar-type,oil-rim reservoir in Nigeria[R].SPE 6702,1978.
[13]刘佳,程林松,范子菲,等.气顶油环协同开发下油气界面运移规律研究[J].西南石油大学学报(自然科学版),2015,37(5):99-105.LIU Jia,CHENG Linsong,FAN Zifei,et al.Experimental studies on oil and gas coordinated development mechanism of oil rim reservoirs[J].Journal of Southwest Petroleum University(Science&Technology Edition),2015,37(5):99-105.
[14]ONWUKWE S.I,OBAH B,CHUKWU G.A,et al.A model approach of controlling coning in oil rim reservoirs[R].SPE163039,2012.
[15]KOLBIKOV S V.Peculiarities of thin oil rim development[R].SPE160678,2012.
[16]NENNIE E,SAVANKO S,ALBERTS G J N,et al.Comparing the benefits:use of various wellhead gas coning control strategies to optimize production of a thin oil rim[R].SPE 125050,2009.
[17]El GAZAR A L,ALKLIH M Y,SUMAIDAA S A B,et al.Field development and optimization plan for compartmentalized oil rim reservoir[R].SPE 177659,2015.
[18]RAZAK E A,CHAN K S,DARMAN N B,et al.Breaking oil recovery limit in malaysian thin oil rim reservoirs:Force Balance Revisited[R].SPE 130338,2010.
[19]祝晓林,张迎春,王月杰,等.渤海S油田厚稠窄边底水油藏水平井合理生产压差研究[J].石油地质与工程,2012,26(1):26-28,32.ZHU Xiaolin,ZHANG Yingchun,WANG Yuejie,et al.Research on reasonable production pressure of horizontal well in edge and bottom water reservoir of Bohai S Oilfield[J].Petroleum Geology and Engineering,2012,26(1):26-28,32.
[20]LI Tingli,GE Lizhen,ZHAO Chunming,et al.Research for horizontal well reasonable drawdown pressure of heavy oil reservoir with bottom water[R].SPE 136730,2010.
[21]OMEKE J E,LIVINUS A,UCHE I N,et al.A proposed cone breakthrough time model for horizontal wells in thin oil rim reservoirs[R].SPE 170743,2010.