The gas reservoir of the second member of the Dengying Formation in Pengtan 1 well area is a typical ultra-deep carbonate bottom water gas reservoir,water invasion is an important issue affecting the effectiveness of gas reservoir development.The gas reservoir is currently in the early stages of evaluation for development,lack of understanding of water invasion mechanisms in gas reservoirs makes it difficult to develop a development strategies.Based on the existing production data and geological data of the gas reservoir,the mechanism model of single wells in different development zones was established by numerical simulation,to predict the way water invasin and to analyze the key factors affecting water invasion.Resalts show that different types of reservoir barrier layer in the Pengtan 1 well area are developed,the phenomenon of water being blocked by the barrier layer is significant,the overall manifestation of water invasion mode is water cone type and water crest type.The production allocation and the height of water avoidance are the main controlling factors affecting the degree of water invasion and the development effect of the two types of development areas.The understanding of water invasion mechanism obtained by thesis analysis provides technical support for the development strategies of Pengtan 1 well area.
关键词
底水气藏/水平井/合理配产/避水高度/水平段长度
Key words
bottom-water gas reservoirs/horizontal wells/reasonable production allocation/height of water avoidance/length of horizontal section
维普
万方数据