D84块非凝析气体辅助蒸汽吞吐技术探讨

Discussion of D84 Block Non-condensable Gas Assisted Steam Stimulation Technology

文章以LH油田D84块的X1012~X1011井组为研究工区,分析了蒸汽吞吐后的稠油油藏特征,研究发现经过多个周期的普通蒸汽吞吐后,油藏呈现加热半径小、压力下降快、动用程度低等特点。针对这些问题,开展了非凝析气体辅助蒸汽吞吐数值模拟研究,结果表明非凝析气体(CO_(2)、N_(2)、烟道气)辅助蒸汽吞吐能有效改善稠油油藏的开发效果,提高产油量和油气比,其中以CO_(2)效果最佳,值得应用推广。

This paper takes the X1012-X1011 well group in LH Oilfield D84 block as the research area.The characteristics of heavy oil reservoirs after steam stimulation are analyzed.It is found that after multiple cycles of conventional steam stimulation,the reservoir exhibits characteristics such as small heating radius,rapid pressure decline and low utilization degree.Then,aiming at these problems,numerical simulation studies on non-condensable gas assisted steam stimulation were conducted.The results show that non-condensable gases(CO_(2),N_(2),flue gas)assisted steam stimulation can effectively improve the development effect of heavy oil reservoirs,increase oil production and oil-gas ratio,among which CO_(2),has the best effect,worthy of application and promotion.