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青海东部气田属第四系气藏，成岩性差，岩层间以泥质胶结为主。台南５ 井岩石Ｘ 射线衍射分析表明粘土含量２０％ ～３０％ ，以绿泥石、伊利石为主；薄片鉴定结果为：碎屑部分占７５ ％ ，胶结部分占２５ ％ ，胶结类型为充填—孔隙式胶结。通过室内化学酸敏实验，选用合适酸浓度范围为ＨＣｌ７－５％ ～１０％ ，ＨＦ２％ ～４ ％ ，Ｈ３ＰＯ４１０％～１５ ％ 。原子吸收光谱分析残酸离子浓度、铁离子浓度高，达３ ５００ｍｇ／Ｌ～４ ０００ｍｇ／Ｌ，酸化液中需加入防铁离子沉淀剂，以减少对地层渗透率的损害。
The eastern gas field in Qinghai is a Quaternary gas reservoir with poor diagenesis and dominated by muddy cementation. X-ray diffraction analysis of the rock in Tainan 5 shows that the content of clay is 20% -30%, mainly chlorite and illite. The identification results of the flake are as follows: 75% of the debris, 25% of the cemented part and the cementation type of filling- Pore cementing. Through laboratory acid-lab experiments, suitable acid concentrations ranged from 7-5% to 10% HCl, from 2% to 4% HF and from 10% to 15% H3PO4. Atomic absorption spectrometry analysis of residual acid ion concentration, high iron concentration, up to 3 500mg / L ~ 4 000mg / L, the acid solution should be added anti-iron ion precipitant to reduce the permeability damage.