裂缝性储层产能预测

发布时间：2018-07-01 08:25

本文选题：测井属性分析 + 致密油储层　；参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：致密储层往往岩石颗粒较小、压实作用较强、泥质含量较高导致其储集空间小,渗流能力差,一般无自然产能或自然产能极低,往往打水平井,然后进行压裂。对于该类储层,裂缝不仅是油气储层的空间,而且还是油气渗流的重要通道,对储层的产能影响作用十分大。因此,如何有效的定量评价裂缝及进行产能预测,对勘探和开发有着重要意义。本文针对致密储层裂缝的特殊情况,分析了常规曲线、电成像及录井资料的裂缝响应特征,基于测井属性分析,提取相应的裂缝属性参数,构建裂缝发育程度综合指标,把裂缝发育程度分为三类:发育、欠发育和不发育。系统分析了裂缝发育程度、有机碳TOC含量、岩石脆性指数和产能的关系,并对储层产能进行分类,把储层分为一类产层、二类产能和干层。同时考虑压裂缝对产能的影响,推导适合无限大地层和有边界地层的水平井产能解析解,以及推导出水平井眼任一点的表皮系数。并利用试油法、含油产状法、压汞法和核磁法综合划分储层下限;以及利用流动单元法和大孔喉法计算地面渗透率,并基于实验分析求取覆压渗透率,有效的提高了渗透率的计算精度;针对储层的孔隙度大小,从电法和非电法的角度计算含油饱和度;基于KGD和PKN裂缝模型计算裂缝参数。最后基于层厚、孔隙度、含油饱和度和岩石脆性指数构建产能指数,定量评价储层产能;以及利用解析公式分别求取了无限大地层和有边界地层的水平井产能,该结果表明,考虑裂缝的解析公式较产能指数法更接近于地层真实情况,求取的产能更准确,说明了解析公式求产能的可行性。
[Abstract]:The tight reservoir often has small rock particles, strong compaction and high muddy content, which results in small reservoir space and poor percolation capacity, generally without natural productivity or extremely low natural productivity, so horizontal wells are often drilled and fracturing is carried out. For this kind of reservoir, fracture is not only the space of oil and gas reservoir, but also the important passage of oil and gas percolation, which has great influence on reservoir productivity. Therefore, it is important for exploration and development to evaluate fractures and predict productivity effectively. In this paper, according to the special situation of tight reservoir fracture, the fracture response characteristics of conventional curve, electrical imaging and logging data are analyzed. Based on log attribute analysis, the corresponding fracture attribute parameters are extracted, and the comprehensive index of fracture development degree is constructed. The degree of fracture development is divided into three types: development, underdevelopment and non-development. The relationship between fracture development degree, TOC content of organic carbon, rock brittleness index and productivity is analyzed systematically. The reservoir productivity is classified into three categories: production layer, productivity and dry layer. At the same time, considering the influence of fracture pressure on productivity, the analytical solution of horizontal well productivity suitable for infinite formation and boundary formation is derived, as well as the skin coefficient of horizontal hole at any point. The lower limit of reservoir is divided by oil test method, oil-bearing occurrence method, mercury injection method and nuclear magnetic method, and the surface permeability is calculated by flow unit method and macropore throat method, and the overburden permeability is obtained based on experimental analysis. The calculation accuracy of permeability is improved effectively, the oil saturation is calculated from the angle of electric method and non-electric method, and the fracture parameters are calculated based on KGD and PKN fracture model. Finally, based on formation thickness, porosity, oil saturation and rock brittleness index, productivity index is constructed to quantitatively evaluate reservoir productivity, and horizontal well productivity of infinite formation and boundary formation is obtained by analytic formula. The analytical formula considering fracture is more close to the real condition of formation than productivity index method, and the calculated productivity is more accurate, which shows the feasibility of calculating productivity by analytic formula.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE328

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