摘要
四川盆地东北部飞仙关组鲕滩储层主要是鲕粒坝(滩)经云化及溶蚀作用改造后形成的残余鲕粒云岩类孔隙性储渗体,是四川气田目前勘探的重点区层。储层分布明显受沉积相带控制,庞家山—月溪场—紫水坝一线以西为储层发育的最有利区,向北东方向储层物性变差。目前已发现渡口河、铁山坡、罗家寨及金珠坪等四个大中型鲕滩岩性—构造复合圈闭气藏,获天然气探明+控制+预测储量1822.77×10~8m^3。储层预测表明,在四川盆地东北部近4000km^2范围内,储层地震异常分布广泛,分布面积达上千平方千米,资源潜力大,勘探领域广阔。
Oolitic beach reservoir of Feixianguan in the northeast of Sichuan basin mostly is relict oolitic dolomitite with large porosity and permeability, which was formed by dolomitization and solution of oolitic grainstone. At present, it is the important exploration zone in the gas fields of Sichuan. Distribution of reservoir is obviously under the control of sedimentary facies. The best region where resevoir developed lies in the west of Penjiashan-Yuexichang-Zishuiba, whereas, the porosity and permeability of reservoir becomes worse towards the northeast of the region. At present, four large or middle oolitic beach compound trap gas pools which were controlled by lithogical character and structure have been discovered in Dukouhe, Tieshan, Luojiazhai and Jingzhuping, obtained geological reserves 1822.77×10~8m^3. According to reservoir prediction, in the scope of 4000 km^2 in the northeast of Sichuan basin, reservoir seismic abnormity distributed widespread, whose area is more than one thousand square kilometers, Showing great resource potential and broad exploration domain.
出处
《中国石油勘探》
CAS
2002年第1期46-55,共10页
China Petroleum Exploration
