The block of YanMuXi in Tu Ha oil-field belongs to loose sandstone reservoir, which has features of loose consolidation, high content of shale and carbonate cement.

• 吐哈油田雁木西疏松砂岩油藏,储层胶结疏松,泥质含量和碳酸盐胶结物含量较高,常规酸化易造成岩石骨架松散,地层出砂,酸后无效。