论文部分内容阅读
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。
The oolitic beach reservoirs in the Feixianguan Formation in the northeastern Sichuan Basin are mainly oolitic dolostone-type porosity reservoirs formed after the alteration of the oolitic dam (beach) by cloudification and dissolution. These are the key areas currently explored in Sichuan gas field Floor. The reservoir distribution is obviously controlled by sedimentary facies belt. The west of Pangushan-Yuexichang-Zi dam is the most favorable area for reservoir development, and the physical property of the reservoir to the easterly direction becomes worse. At present, four large and medium-sized oolitic lithologic-structural composite trap gas reservoirs have been found, including the Dukouhe River, Tieshanpo, Luojiazhai and Jinzhuping, with proven reserves of 1822.77 × 10 ~ 8m ~ 3. The reservoir prediction shows that there is a wide range of seismic anomalies in the area of 4000km ~ 2 in the northeastern Sichuan Basin, with a distribution area of over 1000 km 2, with great potential for resource exploration and broad prospecting.