多元热流体吞吐气体提高热波及半径研究

Study on Improving Heat Wave Radius by Multi-element Thermal Fluid Huff and Puff

目前多元热流体热采注入流体为烟道气体(N2、CO2)与蒸汽或热水的混合体,在注热降黏的基础上,注入的烟道气存在主要在于扩大降黏范围,同时能够提高油藏压力,补充地层能力,利于转抽排液。本文利用数值模拟定量化研究了气体的扩大加热半径作用以及增能保压作用,阐述了多元热流体的作用机理。

At present,the injected fluid of multi-component thermal fluid is a mixture of flue gas(N2,CO2) and steam or hot water. On the basis of heat injection and viscosity reduction,the existence of injected flue gas mainly lies in expanding the range of viscosity reduction,at the same time,it can improve reservoir pressure,supplement formation capacity and facilitate the conversion of pumping and drainage. In this paper,the effect of enlarging heating radius and increasing energy and keeping pressure of reservoir are studied quantitatively by numerical simulation,and the mechanism of multi-element thermal fluid is expounded.