相渗及核磁共振分析在油水层评价中的应用

发布时间：2018-05-16 19:09

本文选题：相对渗透率 + 核磁共振分析　；参考：《东北石油大学》2017年硕士论文

【摘要】：储层物性参数是油气层评价的重要依据,有效孔隙度和渗透率是油气层评价方法的两个重要物性数值。相渗技术是针对岩心样品求取油水的相对渗透率,确定油水的产出能力,是油气层评价的重要参数,由于取心井较少,并且相渗分析成本高,很难推广应用。本课题首次将相渗与核磁技术结合起来,求取储层油水的相对渗透率,对储层产液性质进行识别及产出能力进行评价;核磁共振分析可以提供岩石样品的孔隙度、渗透率、孔喉半径等参数,从分析数据及谱图均可直观反映储层的物性情况。核磁共振分析技术不仅可以提供可靠的储层物性参数,还可以通过岩心样品中油水信号的分布特征定性判断油水的赋存状态,克服了传统储集层评价的局限性。本课题以提供准确的物性参数及建立相渗-核磁资料综合评价油水层方法作为主要攻关方向,课题研究以岩心流动实验为基础,确定了T2截止值的选取方法及优选了渗透率模型,保证核磁分析参数的准确性;以相对渗透率曲线与产液性质关系为基础,以相渗及核磁实验为手段,以校正含水饱和度及渗透率参数为重点,研究大庆部分探区相对渗透率曲线特征,建立相渗-核磁资料评价油水层的方法。本课题发挥两项技术的优势,极大地改善了对储层评价的准确性、对储层计算的合理性、对产层预测的可靠性和对增产措施评价的可能性。
[Abstract]:Reservoir physical parameters are the important basis for reservoir evaluation, and effective porosity and permeability are two important physical values of hydrocarbon reservoir evaluation method. Phase permeation technology is an important parameter of oil and gas reservoir evaluation for determining the relative permeability of oil and water for core samples and determining the production capacity of oil and water. Because of the few coring wells and the high cost of phase permeability analysis, it is difficult to be popularized and applied. In this paper, the relative permeability of reservoir oil and water is obtained by combining phase permeability and nuclear magnetic technique for the first time, and the properties of reservoir fluid production are identified and evaluated. Nuclear magnetic resonance analysis can provide porosity and permeability of rock sample. The pore throat radius and other parameters can reflect the physical properties of the reservoir directly from the analysis data and spectrum. Nuclear magnetic resonance analysis can not only provide reliable physical parameters of reservoir, but also qualitatively judge the occurrence of oil and water through the distribution characteristics of oil-water signals in core samples, which overcomes the limitation of traditional reservoir evaluation. The main research direction of this project is to provide accurate physical parameters and to establish a comprehensive evaluation method of oil-water layer with phase osmotic and nuclear magnetic data, and the research is based on core flow experiment. The selection method of T _ 2 cutoff value and the optimized permeability model are determined to ensure the accuracy of nuclear magnetic analysis parameters, based on the relationship between relative permeability curve and liquid production properties, and by means of phase permeability and nuclear magnetic experiments. Based on the correction of water saturation and permeability parameters, the characteristics of relative permeability curves in some exploration areas of Daqing are studied, and a method for evaluating oil-water layers with phase permeation-nuclear magnetic data is established. This paper gives full play to the advantages of two technologies, greatly improves the accuracy of reservoir evaluation, the reasonableness of reservoir calculation, the reliability of reservoir prediction and the possibility of evaluating production increase measures.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

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