川南麻柳场嘉陵江组气藏水侵机理研究

川南麻柳场嘉陵江组气井多为产水井.研究分地层水特征和机理以及典型井地层压力和储量关系,认为研究区地层水的存储方式为可动自由水、断层封存水和岩性差异局部封存水3种类型.可动自由水表现形式为气藏的边水和底水,地层压力受周边产气井的影响,近邻边水的气井在生产过程中具水驱特征;断层封存水的特征是产水井中产水量不大且均匀,原始地层压力不受周边产气井影响；岩性差异封存水介于自由水和束缚水之间,出水量会随着生产压差的调整而改变.

Study on Water Invasion Mechanism from JiaLingJiang Formation of Maliuchang Gas Pools in Southern Sichuan

Most of wells in Maliuchang Jialingjiang produce water.Based on the analysis of characteristics and mechanism of yielded formation water,as well as research of relationship between reservoir pressure and reserves in typical wells,the storage mode of the formation water in this area is divided into three types includig the movable water,the fault sealing water and the lithological different sealing water.The movable water exist in edge and bottom of gas reservoir,formation pressure is affected by surrounding gas wells,which have water drive characteristic.The fault sealing water in wells is not too much and uniform,original formation pressure won’t be affected by surrounding gas wells.The lithological different sealing water is situated between movable water and bound water,and the number of water will change with adjustment of production pressure.