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羌塘盆地是目前国内石油勘探的热点地区之一,作者综合研究了羌塘盆地的地球物理、石油地质调查资料及INDEPTH-3深部调查结果,得出:1, 盆地内烃源层、储集层、盖层及其组合条件很好, 局部构造发育,有利于形成和保存油气藏,断裂不会成为致命问题,提出了今后工作的主要目的层为上三叠世-中侏罗系组成的中构造层;2,对盆地二级构造作了新的划分,否定羌中隆起,提出盆地表层的主要构造方向为北西-南东向,成“三凹三隆”及“一深凹”的地壳结构特征,其中主沉降带内部及其两侧是最有利的找油气远景地带;3,本区壳幔之间的相互作用较强,盆地北部火山及热活动多,对油气远景评价有较大影响,而盆地南部沉积厚度大,受深层热影响相对较小,是找油气的更有利的地段。4,强调查明深部地层物性、油气赋存状况,烃类物质的来源和上下构造符合情况是当务之急。重点是加强点上的调查和评价研究;5,提出不能轻视伦坡拉陆相第三系盆地找油前景,它可能汇聚有两侧海相地层的油气。
The Qiangtang Basin is one of the hotspots in the field of petroleum exploration in China. The authors comprehensively studied the geophysical and petroleum geological survey data and the INDEPTH-3 deep investigation results in the Qiangtang Basin. The conclusions are as follows: 1. The source rocks in the basin, The strata, caprocks and their assemblage conditions are good. The local tectonics are favorable for the formation and preservation of oil and gas reservoirs. The fracture will not be a fatal issue. The main target of future work is proposed to be composed of the Upper Triassic-Middle Jurassic 2) The new structure of the secondary structure of the basin was divided and the Qiangtang uplift was denied. The main tectonic orientation of the surface layer of the basin was northwest-south eastward, forming “three concave three-long” and “one deep concave” The structural features of the crust, of which the main subsidence zone and the two sides are the most favorable oil and gas prospect; 3, strong interaction between the crust and mantle in the area, volcanic and thermal activity in the northern part of the basin, However, the sedimentary thickness in the south of the basin is large and the influence of deep heat is relatively small. It is a more favorable area for oil and gas exploration. 4. Emphasize the urgent need to identify the physical properties of the deep strata, the status of oil and gas occurrences, the source of the hydrocarbons and the conformity of the upper and lower structures. The focus is to strengthen the point of investigation and evaluation of the study; 5, proposed that we can not underestimate the Lunpola continental Tertiary oil-finding prospects, it may bring together the marine strata on both sides of the oil and gas.