厚层碳酸盐岩油藏流动单元划分——以中东MF油藏为例
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摘要
利用岩石组构法(RFN)、孔隙几何形状法(R35)、流动带指标法(FZI)、水体积法(BVW)和修正的地层洛伦兹图版法(SMLP)对厚层碳酸盐岩油藏MF的流动单元进行定量划分。结果表明:RFN法识别的Ⅰ类流动单元可信度较高; R35法对Ⅰ、Ⅱ、Ⅳ类流动单元的聚类效果明显; FZI法对Ⅲ、Ⅳ类流动单元的分类效果较好; SMLP法适合划分不同类型流动单元边界,同时也可以识别出高速流动区和隔挡层。综合使用上述几种方法,可以有效避免方法自身缺陷和数据异常造成的流动单元划分不准确。
The flow units of MF thick carbonate reservoir are quantitatively divided by rock fabric method( RFN),pore geometry method( R35),flow zone index method( FZI),water volume method( BVW) and modified Lorentz map method( SMLP). The results show that to identify type I flow units by using RFN method is of high reliability; R35 method is of obvious clustering effect to type I,Ⅱ and IVflow units; FZI method is of better classification effect to type Ⅲ and IV flow units; SMLP method is suitable for dividing the boundary of different types of flow units,and can also identify high-speed flow areas and barriers. Combining these methods can effectively avoid the inaccurate division of flow units caused by the method's own defects and data anomalies.
The flow units of MF thick carbonate reservoir are quantitatively divided by rock fabric method( RFN),pore geometry method( R35),flow zone index method( FZI),water volume method( BVW) and modified Lorentz map method( SMLP). The results show that to identify type I flow units by using RFN method is of high reliability; R35 method is of obvious clustering effect to type I,Ⅱ and IVflow units; FZI method is of better classification effect to type Ⅲ and IV flow units; SMLP method is suitable for dividing the boundary of different types of flow units,and can also identify high-speed flow areas and barriers. Combining these methods can effectively avoid the inaccurate division of flow units caused by the method's own defects and data anomalies.
引文
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[3] RODRIGUEZ A. Facies modeling and the flow unit concept as a sedimentological tool in reservoir description:a case study[C]//SPE Technical Conference and Exhibition,1988.
[4] AMAEFULE J,ALTUNBAY M,TIAB D,et al. Enhanced reservoir description:using core and log data to identify hydraulic(flow)units and predict permeability in uncored intervals/wells[C]//Society of Petroleum Engineers,1993.
[5] GUNTER G W,FINNERAN J M,HARTMANN D J,et al.Early determination of reservoir flow units using an integrated petrophysical method[C]//SPE Annual Technical Conference and Exhibition,1997.
[6] MARTIN A. J,SOLOMON S. T. Characterization of petrophysical flow units in carbonate reservoirs[J]. AAPG Bulletin,1997,81(5):734-759.
[7] JENNINGS J W,LUCIA F. Predicting permeability from well logs in carbonates with a link to geology for interwell permeability mapping[J]. SPE Reservoir Evaluation&Engineering,2003,6(4):215-225.
[8] AHRIMANKOSH M,KASIRI N,MOUSAVI S M. Improved permeability prediction of a heterogeneous carbonate reservoir using artificial neural networks based on the flow zone index approach[J]. Liquid Fuels Technology,2011,29(23):2494-2506.
[9]范子菲,李孔绸,李建新,等.基于流动单元的碳酸盐岩油藏剩余油分布规律[J].石油勘探与开发,2014,41(5):578-584.FAN Zifei,LI Kongchou,LI Jianxin,et al. A study on remaining oil distribution in a carbonate oil reservoir based on reservoir flow units[J]. Petroleum Exploration and Development,2014,41(5):578-584.
[10]王志章,何刚.储层流动单元划分方法与应用[J].天然气地球科学,2010,21(3):362-366.WANG Zhizhang,HE Gang. Division of reservoir flow unit and its application[J]. Natural Gas Geoscience,2010,21(3):362-366.
[11]李跃林,段迎利,王利娟,等.基于流动单元的原始地层电阻率反演及其应用[J].西安石油大学学报(自然科学版),2016,31(4):32-37.LI Yuelin,DUAN Yingli,WANG Lijuan,et al. Inversion of original formation resistivity based on flow unit and its application[J]. Journal of Xi’an Shiyou University(Natural Science Edition),2016,31(4):32-37.
[12]赵军龙,朱广社,吴新伟,等.鄂尔多斯盆地NL油田延9流动单元研究[J].西安石油大学学报(自然科学版),2011,26(6):21-25.ZHAO Junlong,ZHU Guangshe,WU Xinwei,et al. Research on Yan-9 flow unit of NL oilfield in Ordos Basin[J]. Journal of Xi’an Shiyou University(Natural Science Edition),2011,26(6):21-25.
[13]王刚,杨满平,许胜洋,等.盘古梁长6特低渗油藏储层流动单元研究[J].西安石油大学学报(自然科学版),2011,26(2):26-30.WANG Gang,YANG Manping,XU Shengyang,et al. Research of the flow units of Chang 6 ultra-low permeability reservoir in Panguliang Area[J]. Journal of Xi’an Shiyou University(Natural Science Edition),2011,26(2):26-30.
[14]张义楷,康安,闵小刚,等.伊拉克米桑油田群Mishrif组MB-2-1段碳酸盐岩储层特征及成因[J].石油实验地质,2016,38(3):360-365.ZHANG Yikai,KANG An,MIN Xiaogang,et al. Characteristics and genesis of carbonate reservoirs in the Mishrif MB-2-1 member in the Missan Oil Fields,Iraq[J]. Petroleum Geology&Experiment,2016,38(3):360-365.
[15]PORRAS J C,CAMPOS O. Rock Typing:A key approach for petrophysical characterization and definition of flow units,Santa Barbara Field,Eastern Venezuela Basin[C]//SPE Latin American and Caribbean Petroleum Engineering Conference,Society of Petroleum Engineers,2001.
[16] BUCKLES R S. Correlating and averaging connate water saturation Data[J]. Journal of Canadian Petroleum Technology,1965,4(1):42-52.