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组合模拟的新型替代方法:用于预测和评估多组件煤床甲 (CBM) 井的储性能的一种半分析方法

Rajeev Upadhyay¹, Idris Kagdi¹, Bibhu Parida²

¹Department of Petroleum Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand 826004, India.

|February 12, 2024

概括

本研究简化了复杂的煤床甲 (CBM) 生产,通过开发一个将多元组件气体流作为单一组件来处理的模型. 这种方法增强了CBM井性能的预测,并考虑了溶解和扩散的复杂性.

科学领域:

石油工程是石油工程中的一个.
地质科学地质科学是指地球科学.
化学工程是化学工程的重要组成部分.

背景情况:

煤床甲 (CBM) 储库存在复杂的生产挑战,原因是断裂的网络,两相流量和可变的储库特性.
关键的挑战包括压力依赖的透性,时间依赖的气体吸附和多元组件气体组成.
现有的模型很难完全捕捉到CBM系统中这些现象的相互作用.

研究的目的:

为CBM水库开发一个修改后的半分析数学模型.
为了准确地描述时间依赖的脱吸,压力依赖的扩散性和多元组分吸附.
为预测和评估CBM井生产性能提供工作流程.

主要方法:

开发了一种修改后的半分析数学模型,整合了多元组分吸附,压力依赖的扩散性和时间依赖的脱吸.
引入了新的转换,以表示多组分吸附作为相当的单组分现象.
相互交织的脱吸物质平衡与完全合的流程方程,用于构成模拟工作流程.

主要成果:

证明了多组件,两相CBM系统可以简化为同等的单组件,单相系统.
开发的模型准确地预测CBM井产量,通过数值模拟 (CMG-GEM) 和现场数据进行验证.
这种新的计算方法是无条件稳定的,比商业模拟器不那么复杂,并且保持了准确性.

结论:

这项研究提供了一种新的计算方法,用于CBM井的组成模拟.
这些发现使简化CBM流程方程用于单相,单元系统的应用成为可能.
这项研究改善了对复杂CBM水库行为的理解和预测.

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