基于体积开放模型的N2-水力化合物裂变的模拟研究
Bingbing Meng1, Bin Shi1,2,3,4,5, Yunxing Cao1,2,3,4,5
1Institute of Resources & Environment, Henan Polytechnic University, Jiaozuo 454000, China.
ACS omega
|January 29, 2024
概括
与传统方法相比,N2-液压复合裂解 (NHCF) 在低透性煤矿库中产生更大的断裂体积和损坏区域. 这种创新技术显示了增强煤床甲开发的前景.
科学领域:
- 石油工程是石油工程中的一个.
- 地质力学 地质力学
- 储水库工程 储水库工程
背景情况:
- 煤床甲 (CBM) 开发在低透性,低压水库中面临挑战.
- 有限的研究存在于N2-液压化合物裂解 (NHCF) 的损伤区演变和压力动态.
研究的目的:
- 研究NHCF在煤矿库中的损伤区,孔隙压力场和流体压力特征的演变.
- 通过数值模拟来比较NHCF与N2压裂 (NF) 和液压压裂 (HF).
主要方法:
- 使用体积开口模型建立了有限元透方程.
- 为水平井阶段断裂构建了一个有限元模型.
- 使用ANSYS与新京煤矿参数进行了NF,HF和NHCF的数值模拟.
主要成果:
- NHCF表现出低于HF但高于NF的初始破裂压力;稳定破裂压力高于HF和NF.
- NHCF创造的体积开口大约是HF的两倍,NF产生最小的体积开口.
- 与NF和HF相比,NHCF产生了最大的损伤区域和孔隙压力场.
结论:
- 在具有挑战性的水库中,NHCF是增强CBM开发的有希望的技术.
- 数字模拟显示与现场测试数据有很强的相关性,验证了模型的准确性.
- 这项研究引入了一种新的数值流体裂变模拟方法.
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