四川盆地自流井区块自2井缝洞系统结构与水侵途径和模式

四川盆地自流井区块自2井缝洞系统因其独特的地理位置、完井方式以及卓越的社会经济效益备受关注，研究其缝洞系统结构和水侵模式，对气藏生产末期管理和预测采收率具有重要意义。因此，首先结合茅口组和栖霞组的溶蚀特点，从该井的生产特点出发，在储量和水侵动态分析方法的论述基础上，从多个方面详细阐述了该缝洞系统的典型地质特点，论证了栖霞组缝洞基本结构及规模，给出了该井的缝洞结构及水侵模式，同时应用非线性物质拟合法、AIF法和补给型物质平衡法对自2井水侵动态进行了研究，分析了其缝洞结构对生产的影响并预测了其生产潜力。此外，根据其历史作用，系统地总结了该井在缝洞型气藏开发中的历史地位和作用。研究对类似的缝洞型油气藏的开发具有一定的指导作用。

Research on the fractured-vuggy system structure and pathways and patterns of water intrusion from Well Z2

Since the Well Z2 seam system has attracted much attention due to its unique geographical location，completion method and excellent social and economic benefits.Studying the structure of the fracture cavity system and the water intrusion model are of great significance for the terminal management and predictive recovery of gas reservoir production.Therefore，based on the dissolution characteristics of Maokou and Qixia Formations，the production characteristics of the well and the discussion of the dynamic analytical method of reserves and water invasion，this paper expounds the typical geological characteristics of the fracture-cave system from many aspects，demonstrates the basic structure and scale of the fracture-cave system of Qixia Formation，and gives the fracture-cave structure and water invasion mode of the well.And the nonlinear material fitting method，AIF method and replenishment material balance method were used to study the water intrusion dynamics of Well 2，and the influence of the fracture cavity structure on production was predicted and its production potential was predicted.According to its historical role，this paper systematically summarizes the historical position and role of this well in the development of fractured-vuggy gas reservoirs，which has a certain guidance for the development of similar fractured-vuggy gas reservoirs.