塔里木盆地西部阿克莫木气藏地层压力特征

阿克莫木气田目前已有多口井完钻,各井在钻揭白垩系砂岩储层前,对地层压力纵向上的变化规律认识不清,在什么层位及深度下7″套管意见仍不统一。本文根据目前研究现状和生产面临问题,对白垩系各组地层分布规律、压力特征进行了详细研究,认为白垩系克孜勒苏群、库克拜组分布稳定,压力窗口相近,白垩系东巴组与上覆古近系阿尔塔什组压力窗口相近。建议今后该区钻探7″套管应下至库克拜组顶部-东巴组底部,减少地层漏失和油气勘探风险。

The characteristics of formation pressure in Akemomu gas field of the western Tarim Basin

There are multi-wells completed in Akemomu gas field right now, but in which formation and how deep to put down 7″pipe before drilling into sandstones reservoir of Cretaceous formation are not uniform till now. The thesis based on the previous research and producing problem at present, detailed analyze the formation distributions and pressure characteristics of each groups in Cretaceous formation, then we conclude that the Kezilesu and Kukebai Groups of Cretaceous distribute steadily, and the pressure windows are close to each other, however the pressure window of dongba group of cretaceous is close to Atashi Group of Paleogene. So we suggest to put down the 7″pipe at the top of the Kukebai Group in order to reduce formation leaking and engineering risks.