在大量岩心、铸体薄片、扫描电镜、X衍射全岩矿物、测井等资料分析的基础上，系统研究了柴北缘超深层（深度超过7 000 m）基岩油气藏的储层主控因素及成藏条件。研究表明：①中酸性花岗质基岩作为储层的优质岩性，在多期变质、构造成缝、风化剥蚀等有利成储因素的耦合效应下，形成以裂缝及溶蚀孔为主要储集空间且受埋藏压实影响小的风化壳与内幕2类成因的有效储层；②侏罗系碳质泥岩（亦是烃源岩）与古近系路乐河组膏质泥岩2套有效盖层为油气长距离运移和有效聚集创造了条件；③生烃期与输导断层及圈闭形成期同步是油气富集成藏的关键因素；④主要分布于凹陷区的侏罗系高成熟煤型气源岩与下伏基岩储层构成侧接式上生下储源储组合，并以断层和基岩顶部的不整合面为烃类运移通道，形成源外、源内2类油气藏。受接替式油气运移机制及盖层条件控制，形成构造高部位聚集石油且充满度与丰度低，构造中—低部位聚集天然气且充满度与丰度高的成藏特点。认为柴北缘超深层基岩具备较大的油气勘探潜力。

Based on analysis of a large number of core samples, thin sections, scanning electron microscopy, X-ray diffraction of whole-rock minerals, and well logging data, a systematic study is conducted on the favorable geological factors and conditions for hydrocarbon accumulation in the bedrock (at depths exceeding 7 000 m) reservoirs in the northern Qaidam Basin. The specific findings are as follows: (1) Intermediate-acidic granitic bedrocks serve as high-quality reservoir lithologies. Under the coupled effects of multiple phases of metamorphism, tectonic fracturing, weathering and erosion, and other favorable reservoir-forming factors, two genetically distinct effective reservoirs have formed: weathering crust and interior reservoirs, with fractures and dissolution pores as the main storage spaces and minimal impact from burial compaction. (2) Two effective sealing layers, namely Jurassic carbonaceous mudstones (which are also source rocks) and Paleogene Lulehe Formation gypsiferous mudstones, provide condition for long-distance hydrocarbon migration and effective accumulation. (3) The synchronization of hydrocarbon generation periods with conductive faults and trap formation periods offers excellent conditions for hydrocarbon enrichment and reservoir formation. (4) The Jurassic high-maturity coal measure gas source rocks, primarily distributing in the depression area and overlying the bedrocks, form a laterally adjacent source-reservoir association with the bedrock reservoirs, with faults and the unconformity at the top of the bedrock serving as hydrocarbon migration pathways, resulting in two types of hydrocarbon reservoirs: extra-source and intra-source. Controlled by differential or successive hydrocarbon migration mechanisms, the reservoirs exhibit characteristics of oil accumulation at structurally high positions with low fullness and abundance, and gas accumulation at structurally medium to low positions with high fullness and abundance. The research indicates that the ultra-deep bedrocks still hold significant potential for hydrocarbon exploration. The analysis of the favorable conditions for hydrocarbon accumulation and their spatiotemporal configuration in these ultra-deep bedrocks can provide target areas for hydrocarbon exploration in this region and also contribute to a deeper understanding of the reservoir-forming and hydrocarbon accumulation processes in deep to ultra-deep bedrocks.