川东高峰场气田石炭系储层评价及分布特征

Carboniferous Reservoir Evaluation and Distribution Characteristics in Gaofengchang Gas Field,Eastern Sichuan Basin

以钻井、岩心及薄片分析为基础,通过储层储集空间及物性分析评价川东高峰场气田石炭系储层,并研究其分布特征。结果表明,高峰场石炭系储层储集空间主要为粒间溶孔、粒內溶孔、晶间溶孔及晶间孔,属于中-低孔低渗储层。气藏以Ⅱ、Ⅲ类储层为主,孔隙为最主要的储集空间,裂缝的发育改善了储层的渗透性,裂缝是天然气渗流的主要通道。储层主要分布在黄龙组二段,气井中储层最厚的是位于构造高点的峰6井,而翼部峰8井最薄,其他各井厚度变化在16~24m之间。

Based on the analysis of drilling,core and swarf,the reservoir space and physical property analysis of reservoirs were used to evaluate the Carboniferous reservoirs in the Gaofengchang gas field in eastern Sichuan Basin,and its distribution characteristics were studied. The results show that the reservoir space of the Carboniferous reservoirs in the Gaofengchang area is mainly intergranular dissolved pores,intragranular dissolved pores,intergranular dissolved pores and intercrystalline pores,belonging to the medium-low porosity and low permeability reservoirs. The gas reservoir is dominated by Type II and III reservoirs. The pores are the most important reservoir space. The development of fractures improves the permeability of the reservoir. Cracks are the main channel for natural gas seepage. The reservoirs are mainly distributed in the second member of the Huanglong Formation. The thickest reservoir in the gas well is the peak 6 well located at the structural high point,while the peak at the wing peak 8 is the thinnest,and the thickness of other wells varies from 16 to 24 m.