摘要
中东地区H油田M组碳酸盐岩储层孔隙结构复杂,非均质性强,造成利用孔渗拟合关系计算渗透率相关性较差。为准确评价研究区储层渗透率,采用Winland R35岩石物理分类方法,对储层分类别建立相应的孔渗回归模型。为了使用分类的渗透率计算模型,需要测井资料对Winland R35进行全井段评价,为此选择表征孔隙结构特征的压汞参数Swanson作为桥梁。利用研究区的岩心Swanson值与密度测井和声波测井之间较好的相关性获取连续的Swanson值,进而对储层Winland R35值做出评价,同时也避免了没有核磁资料来评价储层孔隙结构参数的缺陷。应用结果表明:利用常规测井得到的Winland R35值,可以对研究区储层类别进行连续准确划分,与分类前的孔渗回归模型相比,Winland R35岩石物理分类的渗透率计算结果与岩心渗透率吻合度更高,验证了该方法的准确性与实用性。
The carbonate reservoir of M formation in the H oilfield in the middle east is of complex pore structure with strong heterogeneity and poor relationship of the pore-permeability.This leads to large error in calculating permeability directly by using pore-permeability fitting relationship.To effectively evaluate the reservoir permeability in the study area,the reservoirs were divided into four types according to the Winland R35 petrophysical classification method,and the corresponding pore-permeability regression model was established.In order to use the classified permeability calculation model,log data is applied to evaluate the Winland R35.Since Winland R35 is calculated from porosity and permeability,and pore structure is the key factor to reflect reservoir porosity and permeability,the Winland R35 is then calculated by using the mercury intrusion parameter Swanson which characterizes the pore structure as a bridge.The analysis found that the core Swanson value of the study area is related to density logging and acoustic logging.It is possible to obtain continuous Swanson values by means of density logging and acoustic logging,and then evaluate the reservoir Winland R35 value,while avoiding the defect that there is no nuclear magnetic data to evaluate the pore structure parameters,and finally achieve the purpose of accurately classifying the reservoir types in the study area.The application results show that the Winland R35 value obtained by conventional logging is close to the calculated Winland R35 value.This method can effectively solve the problem of continuous quantitative evaluation of Winland R35,and finally achieve the continuous classification of reservoir types and classified calculation of permeability in the study area.Compared with the pore-permeability regression model before classification,the permeability calculation results of the Winland R35 petrophysical classification are more consistent with the core permeability,indicating the accuracy and practicability of the method.
作者
赵冰
黄雨阳
张占松
张超谟
ZHAO Bing;HUANG Yuyang;ZHANG Zhansong;ZHANG Chaomo(Jingzhou Oil Production Plant of Sinopec Jianghan Oilfield Company, Jingzhou 434020, China;Hubei Cooperative Innovation Center of Unconventional Oil and Gas of Yangtze University,Wuhan 430100,China)
出处
《物探化探计算技术》
CAS
2020年第5期643-650,共8页
Computing Techniques For Geophysical and Geochemical Exploration
基金
国家科技重大专项(2017ZX05032-003-005)。
