天然气地球科学 ›› 2020, Vol. 31 ›› Issue (3): 393401.doi: 10.11764/j.issn.1672-1926.2019.12.016
Zhi-heng SHU(),Dong-liang FANG,Ai-wei ZHENG,Chao LIU,Li LIU,Jing JI,Bang LIANG
摘要:
涪陵页岩气田虽已取得巨大成功,但随着气田开发进入递减期,单井产量逐年递减,因此需寻找新的增产阵地。以四川盆地焦石坝地区龙马溪组一段上部为研究对象,在有机地球化学、全岩X?射线衍射、扫描电镜和岩心观察的基础上进行分析。结果表明,上部气层整体为Ⅱ类页岩储层,具有较优的地质条件。此外通过微地震监测等手段发现,下部气层井压裂形成的有效裂缝大部分未向上延伸至上部气层;上部气层井投产前地层压力比同期邻井的实测地层压力高21.03 MPa,也证实上、下部气层未沟通,上部气层可单独开发。对上部气层评价井进行生产动态分析,计算单井技术可采储量,均达到较高的技术可采储量,具有良好的开发潜力。
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