四川盆地东部下三叠统嘉陵江组储层特征

RESERVOIR CHARACTERISTICS OF T_1j IN THE EAST PART OF SICHUAN BASIN

四川盆地东部下三叠统嘉陵江组(T1j)天然气探明程度约为T1j总资源量的10%,显示勘探潜力较大。文章通过对T1j储集空间特征、储集条件及储集类型等综合研究,认为T1j纵向上多套储产层由于孔洞缝发育程度的差异,T1j15、T1j34、T1j22主要为裂缝—孔隙型储层,T1j14—T1j3、T1j32、T1j12—T1j1主要为孔隙—裂缝型或裂缝型储层;T1j22—T1j1、特别是T1j22孔隙储层是有利目的层;云安厂构造带中—北段、磨盘场—老湾构造、高峰场构造T1j22—T1j1及洋渡溪构造T1j22是有利的目标区块,有良好的油气勘探前景。

The proved natural gas of T1j in the east of Sichuan Basin is about 10% of its total of resources, which indicates the exploration potential is great. Through studying the reservoir spatial characteristics, reservoiring conditions and reservoiring types T1j, it is considered that there are many pay zones due to different pores, vugs and fractures. T1 j3, T1 j34 and T1j 22 belong to the type of fracture-pore reservoir; T 1j14 - T1 j3, T 132 and T1j12 - T1j1 belong to the type of pore-fracture or fracture reservoir; T1j22 - T1j1 especially T1j22 belongs to the type of pore reservoir being the main pay zone. The central section-north section, Mopanchang - Laowan structure, Gaofengchang structure T1j2 2 - T1j1 and Yangduxi structure T 1j22 are favorable target zones with better exploration prospects.