洛带气田蓬莱镇组气藏储层及储量评价研究

Research on Penglaizhen Formation gas reservoir in Luodai gas field and its reserve evaluation

洛带气田蓬莱镇组气藏为川西陆相碎屑岩领域一个典型的低渗—近致密浅层气藏,根据储层的岩性、物性及孔隙结构特征,结合产能状况,将储层划分为4种类型。在储层评价及储量复算的基础上,采用动、静态资料相结合,综合岩性、孔隙结构、测井、试气测试及试采资料,引入气藏开发生产经济技术指标和储能系数作为储量类型的划分标准,将蓬莱镇组气藏储量分为3类,并指出了近期可动用储量的大小和分布特征。

Penglaizhen gas pool in Luodai gas field is a typical shallow gas pool with low permeability-near compactness.Average porosity is 11.47%,average permeability is 2.460×10-3 μm2.This pool is characterized by medium-strong heterogeneity,major types of reservoir space are intergranular dissolved pores and original intergranular pores,assemblage of pore throat exhibits medium pore-fine throat and medium pore-micro throat.According to reservoir lithology and petrophysics and in combination with productivity status,the reservoir is divided into four types.On the basis of reservoir evaluation and reserves re-estimation,using dynamic and static data and in combination with the lithology,pore texture,logging,testing and pilot production data,this paper introduces the economic index for reservoir development and production and storage capacity coefficient as the division criterion of storage types.The reserves of Penglaizhen gas pool can be divided into three types and the size and distribution of near usable reserves is pointed out as well.