低渗透油藏储层分级评价方法研究及应用.pdfVIP

低渗透油藏储层分级评价方法研究及应用 1 杨正明   刘先贵   熊伟   张仲宏  王学武    （廊坊分院渗流流体力学研究所  河北廊坊  065007 ）  摘要：低渗透石油探明储量逐年增加，低渗透油藏未动用储量占未动用总储量的比例较高，急需进行储层评价方面的研究工作。 本文在长庆、大庆外围、吉林和华北等油区2200 块岩心分析的基础上，结合中石油几大低渗透油区的开发现状，提出了用主流 喉道半径、可动流体百分数、拟启动压力梯度、原油粘度和粘土矿物含量作为评价参数，确定了各表征参数的分类界限，对比 了中石油几大低渗透油区储层表征参数数据的差异，深化了对低渗透储层的认识。提出了低渗透油区储层综合评价方法，研究 表明：储层分类系数与区块单井产能有较好的相关关系。在此基础上，对中石油长庆、大庆、吉林 3 大低渗透油区进行储层分 类评价，确定了各油区不同分类级别所对应的渗透率范围，明确了 3 大低渗透油区下步攻关方向。该项研究将对中石油优选产 能建设区块和确定投资具有重大的指导意义，并为中石油确定下步低渗透油藏攻关目标、技术对策及动用界限提供技术支撑。 关键词：低渗透油藏；微观孔隙结构；评价方法；应用  中图分类号：TE311              文献标识码：  A  The Study of Low Permeability Reservoir Grading Evaluation Method and Application YANG Zheng-ming LIU Xiangui, XIONG Wei, ZHANG Zhonghong WANG Xuewu （Institute of Porous Flow Fluid Mechanics,RIPED, Langfang 065007,China） Abstract ： The demonstrated reserves of low permeability reservoir increase year by year. The non-producing reserves of low permeability reservoir have a high percentage in all non-producing reserves. It’s badly in need of researches on reservoir evaluation. 2200 cores of Changqing, Daqing peripheral zone, Jilin and Huabei oil regions were analysed. The development of the main low permeability reservoirs of China National Petroleum Corporation was combined with. The radius of the main flow throat, the percentage of movable fluid, the threshold pressure gradient, the viscosity of oil and the content of clay mineral were used as judgement parameters to ensure the classification limits of the characterization parameters, and to contrast the difference of the characterization parameters of the main low permeability reservoirs of China National Petroleum Corporation. It made us know more about low permeability reservoir and come up with an comprehensive evaluation meth