A full three‐dimensional fracture propagation model for supercritical carbon dioxide fracturing,Energy Science & Engineering

当前位置： X-MOL 学术 › Energy Sci. Eng. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

A full three‐dimensional fracture propagation model for supercritical carbon dioxide fracturing
Energy Science & Engineering ( IF 3.5 ) Pub Date : 2020-06-10 , DOI: 10.1002/ese3.709
Yuting He ₁ , Zhaozhong Yang ₁ , Yanfang Jiang ₂ , Xiaogang Li ₁ , Yongqing Zhang ₂ , Rui Song ₃

Affiliation

Supercritical carbon dioxide fracturing is an environmentally friendly anhydrous method. To study the propagation process during supercritical carbon dioxide fracturing, a full three‐dimensional model, coupled rock deformation, fluid transport, heat conduction, dynamic changes of carbon dioxide physical parameters, to investigate the process of fracture propagation during supercritical carbon dioxide fracturing, is established by the three‐dimensional boundary element method, the finite volume method, and finite difference method. And to solve the multiple physics coupling problems, a fully implicit solution and Newton‐Raphson iteration method are used. On the basis of this model established in this paper, the influential factors of supercritical carbon dioxide fracturing are analyzed. The results show that both of the reservoir temperature and the original in situ stress are important for carbon dioxide fracturing; The higher the reservoir temperature and the lower the initial in situ stress is, the longer and wider the fracture will be. The temperature of carbon dioxide at bottom is of no significance to the fracture length, fracture width, and the bottom hole pressure. A growing injection rate will lead to the increase of the fracture length and fracture width. This study would provide a reference for the fluid phase control of supercritical carbon dioxide fracturing technology.

中文翻译：

超临界二氧化碳压裂的完整三维裂缝扩展模型

超临界二氧化碳压裂是一种环境友好的无水方法。为了研究超临界二氧化碳压裂过程中的扩展过程，结合岩石变形，流体传输，导热，二氧化碳物理参数动态变化的完整三维模型，研究了超临界二氧化碳压裂过程中裂缝的扩展过程。由三维边界元法，有限体积法和有限差分法建立。为了解决多种物理耦合问题，使用了完全隐式解和牛顿-拉夫森迭代法。在本文建立的模型基础上，分析了超临界二氧化碳压裂的影响因素。结果表明，储层温度和原始地应力对二氧化碳压裂均很重要。储层温度越高，初始地应力越低，裂缝将越长越宽。底部二氧化碳的温度对裂缝长度，裂缝宽度和井底压力没有影响。增加的注射速率将导致裂缝长度和裂缝宽度的增加。该研究为超临界二氧化碳压裂技术的液相控制提供了参考。底部二氧化碳的温度对裂缝长度，裂缝宽度和井底压力没有影响。增加的注射速率将导致裂缝长度和裂缝宽度的增加。该研究为超临界二氧化碳压裂技术的液相控制提供了参考。底部二氧化碳的温度对裂缝长度，裂缝宽度和井底压力没有影响。增加的注射速率将导致裂缝长度和裂缝宽度的增加。该研究为超临界二氧化碳压裂技术的液相控制提供了参考。

更新日期：2020-06-10

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11