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辽河油田杜84块馆陶油层为一巨厚块状边顶底水超稠油油藏,在进入蒸汽吞吐开发的中后期,自2005年开始陆续开展了蒸汽辅助重力泄油(SAGD)先导试验,取得了较好开发效果。但随着试验规模的不断扩大和深入,在SAGD中后期采取何种措施,来控制蒸汽腔纵向上扩展,抑制顶水下泄,进一步提高开发效果已迫在眉睫。多介质组合重力泄油(SAGP)是由SAGD演变而来的工艺,在注入蒸汽中加入少量的非凝析气体,以便调整蒸汽腔的扩展方向,降低蒸汽上升速度,从而抑制顶水下泄,有效延长SAGD生产时间。通过对SAGP生产机理的分析,结合杜84块超稠油地质研究和蒸汽辅助重力泄油(SAGD)开发效果评价,优选适合杜84块SAGP添加的非凝析气体的种类,研究设计并优化SAGP的有关注采工艺参数,给出了SAGP技术在试验区应用的开发指标预测结果。研究表明,SAGP是提高杜84块蒸汽辅助重力泄油开发效果行之有效的手段。
The Du 84 block of Liaohe Oilfield is a giant thick massive top and bottom water ultra-heavy oil reservoir. Since entering the middle and late stage of steam huff and puff development, steam-assisted gravity drainage (SAGD) pilot has been carried out since 2005 , Achieved a better development results. However, as the scale of the experiment continues to expand and deepen, what measures are taken in the middle and later stages of SAGD to control the longitudinal expansion of the steam chamber and restrain the release of top water and further enhance the development effect is imminent. Multi-Media Combined Gravity Drainage (SAGP) is a process evolved from SAGD by adding a small amount of non-condensable gas to the injected steam to adjust the expansion direction of the steam chamber and reduce the rate of steam rise, Extend SAGD production time. Based on the analysis of production mechanism of SAGP and the evaluation of development effect of ultra-heavy oil in Du 84 block and development of steam assisted gravity drainage (SAGD), the types of non-condensable gas suitable for Du-84 SAGP are optimized, and the design and optimization of SAGP Of the injection process parameters, given SAGP technology in the pilot area application of the development of index prediction results. Research shows that SAGP is an effective means to improve the effect of Du-84 steam-assisted gravity drainage.