Serious water coning problem and high water cut are seen in the development process of deep conventional heavy oil reservoirs in the Zhuangxie 139 block due to factors such as deep burial depth, highly deviated and extended reach wells and active edge/ bottom water. On the basis of preliminary fine geological study, the mechanism of bottom water coning is studied for heavy oil reservoirs, a conceptual model of horizontal well thermal recovery is build up, and HDCS (horizontal well, dissolver, carbon dioxide and steam) pilot test study is conducted based on laboratory experiment and numerical simulation. The research shows that for the heavy oil reservoirs with bottom water in the Zhuangxie 139 block under conditions of low oil recovery rate and high water cut, HDCS adjustment can effectively control bottom water coning, improve interwell and vertical reserves producing degree and recovery factor.%深层普通稠油油藏桩斜139块由于受储层埋藏深、井斜位移大、边底水活跃等客观因素影响,开发过程中底水水锥严重导致含水居高不下.在区块前期精细地质研究的基础上,深入底水稠油油藏水锥机理研究,建立水平井热采概念模型,在室内实验和数值模拟的基础上开展HDCS开发先导试验研究.研究表明,底水稠油油藏桩斜139块在采油速度低、高含水情况下,后期进行HDCS调整可以有效控制底水锥进,改善井间及纵向上储量动用程度,提高采收率.
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