芭蕉场低孔低渗石炭系气藏滚动勘探开发目标评选

TARGET SELECTION OF PROGRESSIVE E&P IN LOW-PERMEABILITY AND LOW-POROSITY CARBONIFEROUS GAS RESERVOIR,BAJIAOCHANG

芭蕉场气田为川东地区石炭系分布边缘钻获的小型气田,新一轮气藏描述研究,证实其为低孔低渗、地层-构造复合圈闭气藏,含气范围较早期的研究成果明显增大,资源量也相应地增加。按照目前仅有的B1井采气规模,开采周期太长、效益差。通过气藏地质特征、气藏生产动态分析,开展滚动勘探开发目标优选,提出较为合理的滚动勘探开发建议井位,科学、高效地开发利用该气藏,进而为类似气藏的开发提供借鉴。

Bajiaochang gasfield is a small-scale one drilled along Carboniferous margin in eastern Sichuan Basin.A new-round reservoir description further demonstrates that it is a low-permeability and low-porosity,stratigraphic-structural compound trap gas reservoir.Additionally,the gas area is obviously larger than that obtained from previous study,resulting in an increase of resources.If an exploitation pattern of B1 well is adopted,the exploitation period will be long and the benefits are surely poor.In this paper,both geological characteristics and production performance are analyzed,and then the progressive E & P target is selected;the well location suited for more reasonable E & P is proposed.After these,Bajiaochang gas reservoir has been developed effectively and can provide a reference for similar gas reservoirs.