柳杨堡气田太2气藏气水分布规律及其主控因素研究

柳杨堡气田太2气藏产水严重,气水分布规律及其主控因素认识不清。为指导后续开发,综合利用钻井、测井、试气和地层水分析资料研究了气藏产水特征、气水分布规律及其主控因素。结果表明:1太2气藏天然气在定北13-定北17井-定北8-定北15-定北16井一线富集,地层水在定北13~定北10~定北17~定北8~定北14井一线发育;2气水分布主要受烃源岩、储层物性、构造综合控制,水体分布在煤层厚度10 m的低值区、孔隙度7%的地区和构造线-2 480 m的斜坡和洼地地区;3李1-定北16井一线水体欠发育区,可作为气藏进一步开发的重点。该研究可指导气藏开发选区、选井工作,并对类似有水气藏相关研究提供借鉴。

Regularity and Controlling Factors of Gas-Water Distribution of Tai2 Gas Reservoir in Liuyangbao Gas Field

The management of the well with water production and the reservoir development of Tai2 gas reservoir in Liuyangbao gas field are severely affected by the plentiful water production and the vague understanding of both the regularity and controlling factors of gas-water distribution. Based on the testing, drilling and logging explanation data, the research of water production feature, the main controlling factor and regularity of gas-water distribution is conducted. The research presents following results. 1) The gas layer is developed in the line formed by following wells Dingbei-13, Dingbei-17, Dingbei-8, Dingbei-15 and Dingbei-16, and the water layer is developed in the line formed by following wells Dingbei-13, Dingbei-10, Dingbei-17, Dingbei-8 and Dingbei-14. 2) Tightness, incomplete gas-water differentiation and the obvious overlap of water and gas layer are the features of the reservoir. 3) The gas-water distribution is controlled by source rock, reservoir physical property and tectonics, and water distributing in the region where the coal layer depth is less than 10m, the area where porosity is smaller than 7% or the slope and depression under the depth of -2480m. The research has crucial reference meaning, shown in its instruction in the region and well selection in gas reservoir development. Similar gas reservoirs with water production can refer to the research.