电阻率测井确认G地区葡萄花油层产水率方法

发布时间：2018-05-14 10:07

本文选题：产水率 + 油水相对渗透率　；参考：《东北石油大学》2015年硕士论文

【摘要】：大庆G地区葡萄花油层具有高泥、复杂孔隙结构和复杂流体性质的特点,为提高该区块储层流体性质判断准确率和产油产水相对比例计算精度,提出研究利用电阻率测井预测储层产水率的方法。本文针对葡萄花油层的储层特征,引入三水概念将泥质岩石总孔隙水分成可动水、微孔隙水和黏土水,利用弯曲毛管模型,将可动水孔隙等效为由n根毛管组成的孔隙,结合泊肃叶方程和达西定律,推导水相相对渗透率与含水饱和度及可动水流动等效曲折度之间的关系式。利用三孔隙导电模型,推导只有可动流体孔隙存在的岩石电阻增大系数与含水饱和度及可动水导电等效曲折度之间的关系式。再依据可动水水流与电流流动相似性原理,建立了泥质岩石水相相对渗透率与含水饱和度及电阻率增大系数之间的关系。依据可动流体孔隙各组分体积等量关系以及比面积概念,推导出水相相对渗透率与油相相对渗透率关系式,从而得出泥质岩石油相相对渗透率与含水饱和度及电阻率增大系数之间的关系式。针对等效岩石元素模型,依据大小孔隙流量相同,结合泊肃叶方程和达西定律,再依据可动水水流与电流流动相似性原理,推导水相与油相相对渗透率与含水饱和度及可动水孔隙结构效率之间的关系式。结合等效岩石元素模型与三孔隙导电理论,建立了电阻增大系数与含水饱和度及可动水孔隙结构效率之间的关系。从而得出泥质岩石水相和油相相对渗透率与含水饱和度及电阻率增大系数之间的关系式。利用泥质岩样压汞实验数据根据Burdine模型获得水相和油相相对渗透率实验曲线,利用同一泥质岩样的岩电实验数据根据三孔隙导电模型以及等效岩石元素和三孔隙结合导电模型获得岩石电阻增大系数值。在此基础上,对泥质岩石油水相对渗透率与电阻率关系模型进行了实验验证。利用储层产水率与油水相对渗透率之间关系确定储层的产水率。利用岩心分析数据和测井资料建立了葡萄花油层储层泥质含量、孔隙度、束缚水饱和度等参数解释方法。将本文建立的储层产水率预测方法,应用于实际资料解释,结果表明该方法能够准确地预测大庆G地区葡萄花油层产水率。
[Abstract]:The Putaohua reservoir in Daqing G area is characterized by high mud, complex pore structure and complex fluid properties. A method for predicting reservoir water yield by resistivity logging is proposed. In this paper, according to the reservoir characteristics of Putaohua reservoir, the concept of "three water" is introduced to change the total pore water of muddy rock into movable water, micro-pore water and clay water. By using the curved capillary model, the movable water pore is equivalent to the pore composed of n root capillary. The relationship between relative permeability of water phase, water saturation and equivalent zigzag of movable water flow is derived by combining Poiseuer equation and Darcy's law. Based on the three-pore conductivity model, the relationship between the coefficient of increase of rock resistance and the saturation of water and the equivalent degree of conductivity of movable water is derived. Based on the principle of similarity between movable water flow and current flow, the relationship between relative permeability of muddy rock and water saturation and resistivity increase coefficient is established. According to the relation of pore volume and specific area of movable fluid, the relationship between relative permeability of water phase and oil phase is derived. The relationship between the relative permeability of mudstone and the water saturation and resistivity increase coefficient is obtained. According to the equivalent rock element model, according to the same pore flow rate, combined with Poisson's equation and Darcy's law, and then according to the principle of similarity between movable water flow and current flow, The relationship between relative permeability of water phase and oil phase, water saturation and pore structure efficiency of movable water is derived. Based on the equivalent rock element model and the three-pore conductivity theory, the relationship between the coefficient of resistance increase and the water saturation and the efficiency of the movable pore structure is established. The relationship between the relative permeability of muddy rock, water saturation and resistivity increase coefficient is obtained. According to the Burdine model, the experimental curves of the relative permeability of water and oil phases were obtained by using the mercury pressure experimental data of shale samples. According to the three pore conductivity model and the equivalent rock element and three pore combined conductivity model, the rock resistance increase coefficient is obtained by using the rock electrical experiment data of the same muddy rock sample. On this basis, the model of the relation between oil and water relative permeability and resistivity of muddy rock is verified experimentally. The relation between reservoir water production rate and oil-water relative permeability is used to determine reservoir water production rate. Based on the core analysis data and logging data, the interpretation methods of parameters such as muddy content, porosity and irreducible water saturation are established. The prediction method of reservoir water production rate established in this paper has been applied to the interpretation of actual data. The results show that the method can accurately predict the water production rate of Gaohua oil reservoir in Daqing G area.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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