开封地区砂岩孔隙热储回灌化学堵塞数值模拟研究

黄艳艳; 那金; 雷宏武

doi:10.19912/j.0254-0096.tynxb.2022-1579

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太阳能学报 ›› 2024, Vol. 45 ›› Issue (2) : 225-235. DOI: 10.19912/j.0254-0096.tynxb.2022-1579

开封地区砂岩孔隙热储回灌化学堵塞数值模拟研究

黄艳艳¹, 那金¹, 雷宏武²

作者信息 +

NUMERICAL SIMULATION STUDY OF CHEMICAL CLOGGING OF SANDSTONE PORE THERMAL RESERVOIRS RESERVOIR BACKFILL IN KAIFENG AREA

Huang Yanyan¹, Na Jin¹, Lei Hongwu²

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文章历史 +

摘要

以开封圳宇花园的地热开发过程为研究对象,利用TOUGHREACT程序构建三维砂岩孔隙热储层的温度场-化学场-渗流场多场耦合模型,并对主要影响因素进行敏感性分析,探究地热回灌过程对热储层化学堵塞过程的影响。热储层中方解石、石英、伊利石、钙-蒙脱石、二氧化硅矿物沉淀,钾长石、钠长石和白云石矿物溶解,其中方解石矿物为主要沉淀矿物,堵塞回灌井热储层,导致孔隙度降低约10%。回灌过程中回灌水注入流速、温度、井间距的改变影响地热水回灌过程中方解石沉淀,从而导致热储层孔隙度变化。

Abstract

Taking the geothermal development process of Kaifeng Zhenyu Garden as the study object, a three-dimensional sandstone pore thermal reservoir multi-field coupling model of temperature field-chemical field-seepage field was constructed using the TOUGHREACT program, accompanied by the sensitivity analysis of the main influencing factors to investigate the influence of the geothermal reinjection process on the chemical plugging process of the geothermal reservoir. In the thermal reservoir, the minerals such as calcite, quartz, illite, calcium-montmorillonite, and silica dioxide will precipitate. However, the minerals like potassium feldspar, sodium feldspar, and dolomite will dissolve in the geothermal reservoir. Among them, calcite is the main precipitated minerals, which may block the geothermal reservoir of backfill wells, resulting in a porosity reduction of about 10%. The changes of backfill water injection flow rate, temperature, and well spacing during the backfill process affect the precipitation of calcite in the backfill process of geothermal water, thus lead to variation in the porosity of the geothermal reservoir.

导出引用

黄艳艳, 那金, 雷宏武. 开封地区砂岩孔隙热储回灌化学堵塞数值模拟研究[J]. 太阳能学报. 2024, 45(2): 225-235 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1579

Huang Yanyan, Na Jin, Lei Hongwu. NUMERICAL SIMULATION STUDY OF CHEMICAL CLOGGING OF SANDSTONE PORE THERMAL RESERVOIRS RESERVOIR BACKFILL IN KAIFENG AREA[J]. Acta Energiae Solaris Sinica. 2024, 45(2): 225-235 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1579

中图分类号： P314.9

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