油气保存条件是影响南方海相油气勘探决策的关键因素.研究了南盘江坳陷油气保存条件的基本特点,在整体不利的区域地质背景下,依据断裂带的流体化学-动力学响应特征、泥岩盖层封闭性、剥蚀作用的破坏影响及现今地下水动力场特征与水文地质开启程度,排除高风险区,分析对比筛选出相对有利勘探区块.结果表明:南盘江断裂带、右江断裂带的开启程度高,现今大气水下渗循环深度大,不利于油气保存;南盘江坳陷的坝林构造有中温温泉出露,不利于天然气的保存;在中三叠统泥岩、粉砂质泥岩现今残存覆盖的秧坝区块,断裂破碎作用较弱,油气藏可能得到继续保存,是较有利的油气勘探区块;南盘江坳陷分别在三叠纪末印支运动和白垩纪后的燕山—喜山运动期间经历了抬升剥蚀作用.印支运动使得印支期形成的油气藏遭受了一定的破坏,但破坏作用相对较弱.燕山—喜山运动使得沉积盖层遭受了强烈的挤压、抬升剥蚀作用,对南盘江地区油气藏造成了严重的破坏.其中,影响最强烈的地区主要为二叠系或其以下地层直接出露地表的地区,而三叠系覆盖区残留的二叠系、石炭系和泥盆系地层仍有勘探希望. The hydrocarbon preservation conditions are the key factors that influence the oil and gas exploration and decision-making of the southern marine facies.The basic characteristics of oil and gas preservation conditions in the Nanpanjiang Depression are studied.Under the unfavorable regional and geologic background, according to the fluid chemical-dynamic response characteristics of the fault zone, Mudstone caprock and denudation, as well as the current characteristics of groundwater hydrodynamic field and hydrogeological open degree, excluding high-risk areas, and comparatively filtering out relatively favorable exploration blocks.The results show that the Nanpanjiang fault zone, the Youjiang fault The degree of opening of the belt is high, and the depth of the atmospheric infiltration cycle is large today, which is not conducive to the preservation of oil and gas. The dam structure in Nanpanjiang Depression is exposed by moderate temperature hot springs, which is not conducive to the preservation of natural gas. In the Middle Triassic mudstone, silt The reservoirs that are now covered by mudstone in the mudstone are weak, and the reservoirs in the Nanpanjiang depression are relatively favorable for oil and gas exploration. At the end of the Triassic, the Indosinian movement and the Cretaceous After the Yanshan-Himalayan movement experienced uplift and erosion during the Indosinian movement caused the Indosinian formation of reservoirs suffered some damage, but the damage is relatively weak. - The Himalayan movement made the caprock subjected to strong compression and uplifting and denudation, which caused serious damage to the oil and gas reservoirs in the Nanpanjiang area, of which the most affected areas were mainly the Permian directly or below However, the remaining Permian, Carboniferous and Devonian strata in Triassic covered areas still have exploration potential.