Analyses and countermeasures for water-producing in fractured-vuggy gas condensate reservoirs
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摘要: 塔河油田9区奥陶系气藏为碳酸盐岩缝洞型凝析气藏，生产后期因高含水严重制约产量的稳定。针对这一现象，深入研究了单井含水特征、缝洞型储层油气水相渗机理和见水模式，认为本区含水特征分为缓慢上升型、快速上升型、暴性水淹型和无水型4种类型；油气水相渗研究认为，裂缝-孔洞储层气流动能力比裂缝型储层高，且裂缝型储层中气体流动能力受液相影响更为明显和突出；总结出了纵深断裂沟通型、裂缝、孔洞沟通型和定容型3种水侵模式，并给出相应开发技术对策。Abstract: The Ordovician gas reservoirs in block 9 of the Tahe oil field are carbonate-type fractured-vuggy gas condensate reservoirs. High water content in the later stage of production severely restricts stale production. In this paper, the water seepage mechanism and water pattern of the single well were analyzed, and the water charac-teristics in this area were divided into slow rising type, rapid ascending type, flooding type and no water type. The results showed that the gas flow capacity of fractured-vuggy reservoirs is higher than that of fractured reservoirs, and the gas flow capacity in fractured reservoirs is more obviously controlled by liquid facies. There are three water intrusion modes including vertical fracture communication, fracture and cave communication, and fixed volume. Some countermeasures were proposed respectively.
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