陆相多层砂岩油藏渗透率表征与定向井初期产能预测——以蓬莱19-3油田为例
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摘要
基于对蓬莱19-3油田多层砂岩油藏定向井初期产能主要影响因素的研究,提出基于岩相约束的渗透率解释模型,建立了适用于海上多层砂岩油藏的定向井初期产能预测公式。蓬莱19-3油田定向井初期产能主要影响因素为渗透率和含油饱和度。利用蓬莱19-3油田岩心、扫描电镜、铸体薄片、测井和生产动态等资料,综合考虑储集层宏观沉积特征和微观孔隙结构对渗透率的影响,建立了基于岩相约束的多层砂岩油藏渗透率解释新模型。在渗透率校正的基础上,引入电阻增大率表征含油饱和度的影响,修正Vandervlis的定向井产能公式,得到适用于陆相多层砂岩油藏定向合采井初期产能的计算公式。研究结果表明,考虑岩相约束后的渗透率并引入电阻增大率后的产能预测公式计算精度高。
Based on study on the main factors affecting the initial productivity of directional wells in multilayer sandstone reservoirs of Penglai 19-3 oil field, a permeability interpretation model based on lithofacies constraint was established, and an initial productivity prediction formula for directional wells in offshore multilayer sandstone reservoirs was derived. Permeability and oil saturation are the main factors affecting initial productivity of directional wells in Penglai 19-3 oil field. Using core, scanning electron microscope, casting thin section, logging and production data, and a new permeability interpretation model considering the influence of macro sedimentary characteristics and microscopic pore structure was built. On the basis of permeability correction, resistivity increase ratio is introduced to characterize the effect of oil saturation, to modify the Vandervlis productivity formula of directional wells to get an initial productivity prediction equation suitable for continental multilayer sandstone reservoirs. The study results show that the permeability considering petrographic constraints and the production forecasting formula including resistivity increase ratio are more accurate.
Based on study on the main factors affecting the initial productivity of directional wells in multilayer sandstone reservoirs of Penglai 19-3 oil field, a permeability interpretation model based on lithofacies constraint was established, and an initial productivity prediction formula for directional wells in offshore multilayer sandstone reservoirs was derived. Permeability and oil saturation are the main factors affecting initial productivity of directional wells in Penglai 19-3 oil field. Using core, scanning electron microscope, casting thin section, logging and production data, and a new permeability interpretation model considering the influence of macro sedimentary characteristics and microscopic pore structure was built. On the basis of permeability correction, resistivity increase ratio is introduced to characterize the effect of oil saturation, to modify the Vandervlis productivity formula of directional wells to get an initial productivity prediction equation suitable for continental multilayer sandstone reservoirs. The study results show that the permeability considering petrographic constraints and the production forecasting formula including resistivity increase ratio are more accurate.
引文
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[3]王德民.分层开采理论研究[M].北京:石油工业出版社,1985.WANG Demin.Slicing production theory[M].Beijing:Petroleum Industry Press,1985.
[4]王进财,赵伦,张祥忠,等.古潜山岩溶储集层特征及其对产能的控制作用[J].石油勘探与开发,2015,42(6):779-786.WANG Jincai,ZHAO Lun,ZHANG Xiangzhong,et al.Buried hill karst reservoirs and their controls on productivity[J].Petroleum Exploration and Development,2015,42(6):779-786.
[5]郭太现,刘春成,吕洪志,等.蓬莱19-3油田地质特征[J].石油勘探与开发,2001,28(2):26-28.GUO Taixian,LIU Chuncheng,LYU Hongzhi,et al.Geological characteristics and hydrocarbon accumulation pattern of Penglai 19-3oil field[J].Petroleum Exploration and Development,2001,28(2):26-28.
[6]罗宪波,李波,刘英,等.存在启动压力梯度时储层动用半径的确定[J].中国海上油气,2009,21(4):248-249.LUO Xianbo,LI Bo,LIU Ying,et al.The determination of drainage radius for reservoirs with a start-up pressure gradient[J].China Offshore Oil and Gas,2009,21(4):248-249.
[7]AMOTT E.Observations relating to the wettability of porous rock[R].SPE 1167-G,1959.
[8]ANDERSON W G.Wettability literature survey:Part 1:Rock/oil/brine interactions and the effects of core handling on wettability[R].SPE 13932,1984.
[9]ANDERSON W G.Wettability literature survey:Part 2:Wettability Measurement[R].SPE 13933,1984.
[10]ANDERSON W G.Wettability literature survey:Part 3:The effects of wettability on the electrical properties of porous media[J].Journal of Petroleum Technology,1986,38(12):1371-1378.
[11]张振华,鄢捷年.储层损害对大斜度定向井产能影响的计算方法研究[J].石油钻采工艺,2001,23(6):40-42.ZHANG Zhenhua,YAN Jienian.Study of formation damage effect on the productivity for directional wells[J].Oil Drilling&Production Technology,2001,23(6):40-42.
[12]CINCO-LEY H,RAMEY H J Jr,MILLER F G.Pseudo-skin factors for partially penetrating directionally drilled wells[R].SPE 5589-MS,1975.
[13]BESSON J.Performance of slanted and horizontal wells on an anisotropic medium[R].SPE 20965-MS,1990.
[14]黄世军,康博韬,程林松,等.海上普通稠油油藏多层合采层间干扰定量表征与定向井产能预测[J].石油勘探与开发,2015,42(4):488-495.HUANG Shijun,KANG Botao,CHENG Linsong,et al.Quantitative characterization of interlayer interference and productivity prediction of directional wells in the multilayer commingled production of ordinary offshore heavy oil reservoirs[J].Petroleum Exploration and Development,2015,42(4):488-495.
[15]程林松,李忠兴,黄世军,等.不同类型油藏复杂结构井产能评价技术[M].青岛:中国石油大学出版社,2007.CHENG Linsong,LI Zhongxing,HUANG Shijun,et al.The productivity evaluation methods of complex structure wells with different types[M].Qingdao:China University of Petroleum Press,2007.