考虑各向异性的砂岩地热储层提高数值模拟精度方法  

A method for improving anisotropic numerical simulation accuracy of sandstone geothermal reservoirs

作　　者：郎宝山 范显利 薄浩 冯学坤 张志伟 刘长生 赵雅静 LANG Baoshan;FAN Xianli;BO Hao;FENG Xuekun;ZHANG Zhiwei;LIU Changsheng;ZHAO Yajing(PetroChina Liaohe Oilfield Company Environmental Engineering Corporation,PanJin 124010,Liaoning,China;Beijing GEM Flower Energy Science&Technology Co.,Ltd,HaiDian 100088,Beijing,China)

机构地区：[1]辽河油田环境工程公司,辽宁盘锦124010 [2]北京宝石花能源科技有限公司,北京100088

出　　处：《石油钻采工艺》2024年第3期309-316,共8页Oil Drilling & Production Technology

摘　　要：为了确保沈260区块地热田能在合理采灌方式下实现可持续稳定开发,利用Petrel软件建立了包括构造、岩性、孔隙度、渗透率、温度和压力等信息的三维精细地质模型。基于该模型,利用CMG软件对7口单井的生产动态进行了历史拟合,分析了不同井距、构造位置和井网条件下温压场和渗流场的演化规律,从而确定了沈260区块最合理的开采方式。研究表明,利用Petrel软件建立的精细模型可以精确描述地热田的构造、岩性、物性和温压场的空间分布规律。通过CMG热采软件进行的单井生产历史拟合率达到了100%,较均一地质模型拟合率提高了15个百分点。此外,研究确定了合理的开采井距为400 m,并推荐沿垂直构造位置采用五点法部署方式作为该区块的最佳开发方案。该研究为类似地区的地热田开发提供了一种更精确的预测方法,对提高地热资源的利用效率和可持续性具有重要意义。In order to ensure the sustainable and stable development of the geothermal field in Block Shen 260 with reasonable mining and irrigation methods,a three-dimensional fine geological model including such data as structure,lithology,porosity,permeability,temperature and pressure was established using Petrel software.On this basis,the production performances of seven single wells were historically matched using CMG software to obtain the evolution laws of temperature and pressure fields and seepage fields under different well distances,structural positions,and well network conditions,and thus to determine the most reasonable mining method for Block Shen 260.The research has shown that the fine model established by Petrel can accurately describe the structure,lithology,physical properties,and spatial distribution of temperature and pressure fields in geothermal fields.The history matching rate of single well production using CMG thermal recovery software is 100%,which is 15%higher than the matching rate by uniform geological models.Furthermore,this research has determined a reasonable mining well spacing of 400 meters and deploy the five point method along the vertical structural position as the reasonable development method for this block.This study provides a more accurate prediction method for the development of thermal fields in similar regions,which is of great significance to improve the utilization efficiency of geothermal resources and maintain sustainable development.

关 键 词：新能源 地热资源 地质模型 数值模拟 温度场 压力场 渗流场 井网部署 勘探开发 

分 类 号：P314[天文地球—固体地球物理学]