基于多关键井平均曲线标准化方案的致密砂岩渗透率精确计算  

Accurate Calculation of Tight Sandstone Permeability Based on Multi-Key Well Average Curve Standardization Scheme

作　　者：隋强 李雪英[1] 朱柏锋 何谞超 SUI Qiang;LI Xueying;ZHU Baifeng;HE Xuchao(College of Earth Science,Northeast Petroleum University,Daqing,Heilongjiang 163318,China;Fangxing Branch,CNPC Daqing Oilfield,Daqing,Heilongjiang 163000,China)

机构地区：[1]东北石油大学地球科学学院,黑龙江大庆163318 [2]大庆油田有限责任公司方兴分公司,黑龙江大庆163000

出　　处：《测井技术》2024年第4期488-499,共12页Well Logging Technology

基　　金：黑龙江省自然科学基金联合引导项目“基于马尔科夫链的厚度随机分布薄互层时频响应机理研究”(LH2021D010)。

摘　　要：X地区致密砂岩储层地质条件复杂,纵横向非均质性强;测井资料采集时间跨度大、标准化程度低;储层参数影响因素复杂,导致孔隙度、渗透率的计算精度低。为此提出一种多关键井平均、双标准层控制、趋势面法与直方图法相互验证的测井曲线标准化方案,系统解决单一标准层存在的相变、缺失、非均质性、特征值异常等一系列问题,标准化后孔隙度计算精度显著提高。在此基础上,基于流体流动单元储层分类理论,确立储层分类标准,构建基于流体流动单元的分类渗透率精确计算模型。利用多元线性回归方法建立测井曲线表征的流体流动单元计算模型,实现储层分类和渗透率计算的连续、定量评价。提出的标准化方案可提高测井曲线标准化的稳定性、适应性和可靠性,为储层分类及参数计算提供坚实的数据基础。该方法为该地区致密储层精细评价提供有力的技术支持,具有重要的应用和推广价值。The tight sandstone reservoirs in area X exhibit complex geological conditions and strong longitudinal and horizontal heterogeneity.The collection of logging data spans a long time period and the standardization degree of logging data is low.The complex influencing factors of reservoir parameters lead to low calculation accuracy of porosity and permeability.Therefore,a logging curve standardization scheme with multi-key well average,double standard layer control,mutual verification of trend surface method and histogram method is proposed to systematically solve a series of problems such as phase change,loss,heterogeneity and eigenvalue anomaly in a single standard layer.The proposed scheme significantly improves the accuracy of porosity calculation after standardization.Furthermore,a reservoir classification standard is established based on the fluid flow unit theory,and an accurate calculation model for classification permeability based on fluid flow unit is constructed.Using multiple linear regression method,the fluid flow unit calculation model characterized by logging curves is established to realize the continuous and quantitative evaluation of reservoir classification and permeability calculation.The newly proposed standardization scheme improves the stability,adaptability,and reliability of logging curve standardization,thus providing a solid data foundation for reservoir classification and parameter calculation.This method offers robust technical support for the detailed evaluation of tight reservoirs in area X,and holds significant application and promotion value.

关 键 词：测井评价 致密砂岩储层 多关键井平均 曲线标准化 渗透率建模 流动单元指数 

分 类 号：P631.84[天文地球—地质矿产勘探]