海上深层低渗砂砾岩储层工程甜点多元分析评价方法  

Multivariate analysis and evaluation method for engineering sweet spots of offshore deep low-permeability glutenite reservoirs

作　　者：刘灵童 葛岩 张海翔[3] LIU Lingtong;GE Yan;ZHANG Haixiang(Experimental Analysis Branch of National Engineering Research Center of Offshore Oil and Gas Exploration,Beijing 100028,China;CNOOC Ener Tech-Drilling&Production Co.,Tianjin 300450,China;School of Petroleum Engineering of Northeast Petroleum University,Daqing,Heilongjiang 163318,China)

机构地区：[1]海洋油气勘探国家工程研究中心实验分析分中心,天津市300450 [2]中海油能源发展股份有限公司工程技术分公司 [3]东北石油大学石油工程学院

出　　处：《录井工程》2024年第4期77-83,共7页Mud Logging Engineering

摘　　要：海上深层低渗砂砾岩储层是下步产能接替的重点拓展方向,有效动用低渗透储层内储量主要依靠储层压裂改造,对工程甜点的有效认识是高效储层改造方法的关键,为此研究了一种基于灰色关联-层次分析算法的工程甜点多元分析评价方法。针对低渗砂砾岩储层特征确定了弹性模量、泊松比、水平地应力差、脆性指数、压裂系数5个工程甜点评价参数计算方法,结合灰色关联-层次分析算法计算各参数影响权重,建立了砂砾岩工程甜度指示因子计算及分类方法。该方法在渤中X区孔店组低渗砂砾岩储层进行应用,并完成了该区域工程甜点计算和分类,确定了各类甜点分布情况。结果表明,该方法可以较为清晰合理地对低渗砂砾岩储层工程甜点进行评价,为海上低渗砂砾岩储层压裂开发提供基础支撑。Offshore deep low-permeability glutenite reservoirs are the key development direction for the next productivity replacement.The effective producing reserves in low-permeability reservoirs mainly depends on the reservoir fracturing.The effective understanding of engineering sweet spots is the key to the efficient reservoir stimulation method.An evaluation method of multivariate analysis for engineering sweet spots based on grey correlation-hierarchical analysis algorithm is studied.According to the characteristics of low-permeability glutenite reservoirs,the calculation methods of engineering sweet spot evaluation parameters including elastic modulus,Poisson ratio,horizontal earth stress difference,brittleness index,and fracturing coefficient are determined.Combined with the grey correlation-hierarchical analysis algorithm,the influence weight of each parameter is calculated,the calculation and classification methods of sweetness indicative factor of glutenite engineering are established.The methods have been applied to the low-permeability glutenite reservoirs of Kongdian Formation in Bozhong X area,the calculation and classification of engineering sweet spots in this area have been completed,and the distribution of various sweet spots has been determined.The results show that the methods can clearly and reasonably evaluate engineering sweet spots of low-permeability glutenite reservoirs,and provide basic support for fracturing development of offshore low-permeability glutenite reservoirs.

关 键 词：低渗砂砾岩 工程甜点 甜度指示因子 灰色关联 层次分析 

分 类 号：TE132.1[石油与天然气工程—油气勘探]