摘要
致密砂岩中形成的低孔低渗储集砂体往往具有复杂的气水关系,常常出现气水同产、气水关系倒置等现象,安岳地区须二气藏即属于此类。根据测试、显示、测井解释及电阻率曲线等,确定单井的气水界面或气水过渡带中间面,依据致密砂岩成藏机制模拟实验结果,推论须二气藏的成藏机理,最终得到须二气藏的气水分布规律,即安岳地区须二气藏气水界面受构造等高线的影响,造成构造低部位产气,构造高部位产水的现象,形成倾斜的气水界面。
Reservoir sand body with low-porosity and-permeability in tight sandstone has a complicated gas-water relation;there usually exists simultaneous production and relation inversion of gas and water;for instance,Xujiahe 2 Member gas reservoir in Anyue Area.In this study,based on testing,log interpretation and resistivity curve,the gas-water interface or intermediate surface of gas-water transition zone of a single well have been determined.According to the reservoir-forming mechanism of Xujiahe 2 Member inferred from the experimental results of tight sandstones,the distribution law of gas and water is obtained.That is,the gas-water interface is impacted by structural contour line,resulting in gas production in lower part of the structure whereas water production in higher part,forming a tilting gas-water interface.
出处
《天然气勘探与开发》
2010年第3期5-9,共5页
Natural Gas Exploration and Development
关键词
安岳地区
须二段
致密砂岩
气水分布
Anyue area,Xujiahe 2 Member,tight sandstone,gas-water distribution
