水平井数据在精细地质建模中的应用  

Application of horizontal well data in fine geological modeling

作　　者：王红坤 WANG Hongkun(Exploration&Development Research Institute of Henan Oilfield Company,SINOPEC,Zhengzhou 450000,Henan,China)

机构地区：[1]中国石化河南油田分公司勘探开发研究院,河南郑州450000

出　　处：《石油地质与工程》2023年第4期61-65,共5页Petroleum Geology and Engineering

摘　　要：阿尔巴尼亚PM油田M0小层地震数据缺乏、直井少,造成地质模型精度较低。通过分析水平井数据的特点以及水平井数据在精细地质建模中的优势和应用误区,提出了相应的应用对策。研究表明,水平井具有目的层段井轨迹长、数据信息量大、数据方向性强和砂体钻遇率高等特点。水平井目的层段井轨迹长和数据信息量大使水平井数据在精细地质建模中能够为目的层构造面成图提供更多的控制点、进一步落实砂体微构造在纵向上的起伏和提高属性模型预测精度;但砂体钻遇率高和方向性强导致岩相模型砂岩占比过大和属性模拟过程中影响变差函数分析。针对存在的应用误区,提出在建模时充分利用钻井数据,细分小层内部的“砂泥岩”,建立约束岩相分布的框架。对于“砂岩”小层,变差函数分析时仅使用直井数据,属性预测使用直井+水平井数据;对于“泥岩”小层,变差函数分析和属性预测使用直井+水平井数据,建立相应的岩相和岩相约束的属性模型。该应用对策能够有效解决水平井数据应用时产生的问题,使模型能更加真实地反映地质特征。Lack of seismic data and vertical wells,the M0 small layer of PM Oilfield in Albania has a low accuracy of geological model.Through analyzing the characteristics of horizontal well data,the advantages and application errors of horizontal well data in fine geological modeling,the corresponding application strategy is proposed.The research shows that the horizontal well has the characteristics of long well trajectory,large amount of data information,strong data directionality and high sand body drilling rate.The length of well trajectory and the amount of data information in the target interval of the horizontal well mean that the horizontal well data can provide more control points for the mapping of the structural plane of the target layer in the fine geological modeling,further implement the vertical fluctuation of the sand body microstructure and improve the prediction accuracy of the attribute model.However,the high drilling rate and strong directionality of the sand body lead to the large proportion of sandstone in the lithofacies model and affect the analysis of variation function in the process of attribute simulation.In view of the existing application errors,it is proposed to make full use of drilling data in modeling,subdivide the"sandstone and mudstone",and establish a framework to constrain the distribution of lithofacies.For the"sandstone",only the vertical well data is used for the variation function analysis,and the vertical well+horizontal well data are used for attribute prediction.For the"mudstone",the vertical well+horizontal well data are used for the variation function analysis and then the corresponding attribute models of lithofacies and lithofacies constraint are established.This application strategy can solve the problems arising from the application of horizontal well data and make the model better reflect the geological characteristics.

关 键 词：精细建模 水平井数据 变差函数 应用对策 

分 类 号：TE319[石油与天然气工程—油气田开发工程]