裂缝性有水气藏开采特征和开发方式优选

裂缝性有水气藏指具有边（或底）水（包括带油环或底油）气藏和凝析气藏，其储集层属裂缝-孔隙型或裂缝-孔洞型，非均质性严重，主要储集空间是基质中的孔、洞、主要渗流通道是裂缝。在裂缝性有水气藏开采过程中，地层边（或底）水（和油）容易沿裂缝通道向生产井窜流，造成气水（和油）多相流、井产量降低，部分气区被水封隔为难采区，水窜入含气区对采气危害很大，若不及时采取措施，就会降低采收率，造成难以弥补的损失，根据平衡开采原理，提出避免水害以提高这类气藏采收率和开发经济效益的最佳开发方式，并辅以3个老气田的实例加以说明。

Production characteristics and the optimization of development schemes of fractured gas reservoir with edge or bottom water

This paper discusses the production characteristics and development scheme of gas reservoirs and gas condensate reservoirs with edge or bottom water and oil ring or bottom oil. The characteristics of this type of gas reservoir are the followings: (1) pore is the main storage space of fluid; (2) fracture is the main percolation flow channel; and (3) the distribution of pore and fracture is seriously heterogeneous. During the development process of the reservoir, its dynamic performance mainly are: edge or bottom water and oil will easily flow to producer along the high permeable fracture channel; and water influx into the gas bearing area will heavily influence gas production, for example, forming gas, water (and oil) multi phase flow, decreasing gas rate of producer, forming some water locked gas bearing areas and reducing the recovery of gas and oil. The watered out mechanism and its harm extent are discussed. Based on the principle of balanced production, this paper offers the optimal development scheme to avoid water influx, enhance gas and oil recovery and improve economic benefit. Three examples of mature gas fields are given in this paper.