岩性油气藏 ›› 2020, Vol. 32 ›› Issue (1): 161168.doi: 10.12108/yxyqc.20200118
• 石油工程 • 上一篇
周瑞1, 苏玉亮1, 马兵2, 张琪3, 王文东1
ZHOU Rui1, SU Yuliang1, MA Bing2, ZHANG Qi3, WANG Wendong1
摘要: 目前,非常规储层开采以水平井分段压裂技术为主,而体积压裂会在地下产生诱导裂缝并沟通天然裂缝形成复杂裂缝网络。为了更好地模拟页岩气在地下缝网中的流动情况,以组分模拟器为平台,基于双孔介质模型,结合随机分形几何系统,将复杂裂缝网络与页岩气数值模型耦合,来建立随机分形裂缝网络模型,并基于该模型进一步研究CO2吞吐开采页岩气的5个方案。结果表明:CO2吞吐能够显著提高页岩气的产量,注入压力和注入时间的增加均能提高最终采收率,后者在吞吐开采页岩气的过程中存在最优值,而注入时机过早或过晚都会使生产效果变差,在每个CO2吞吐周期中存在一个最佳注入时机范围。分形裂缝网络模型为深入开展裂缝CO2吞吐开采页岩气藏的模拟研究提供了一定的理论基础。
中图分类号:
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