四川盆地东部下三叠统嘉陵江组储层特征

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TT₁j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，T₁j⁵₁、T₁j⁴₃、T₁j²₂主要为裂缝-孔隙型储层，T₁j⁴₁-T₁j³、T₁j²₃、T₁j²₁-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。

RESERVOIR CHARACTERISTICS OF T1j IN THE EAST PART OF SICHUAN BASIN

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. T1j31,  T1j43 and T1j T1j22 belong to the type of fracture pore reservoir; T1j41—T1 j3 , T1j23 and T1j21—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 T1j22—T1j1 and Yangduxi structure T1j22 are favorable target zones with better exploration prospects.