| This thesis based on the most use of drilling, seismic data, logging and analytical data we studied the stratigraphy , structure and reservoir conditions of xinglongtai buried hill. We sum up the reservoir forming condition and main factors controlling hydrocarbon accumulation, which will guide the work of reserves calculation, exploration and development of Xinglongtai buried-hill.The research results is as followed:1,Study of inner Xinglongtai buried hill stratigraphy:①the Xilongtai Archaeozoic buried-hill was made up of metamorphic rock and magmatic rock, while metamorphic rock can be divided into three categories 25species and magmatic rock can be devided into three categories 8 species.②t he identification of the Buried-hill lithology through the dynamic integration of curves has been realized, we found that the rocks in inner buried hill are layer like or so.③We first use the grain zircon U Pb dating skill identified the metamorphic rock are formed in Paleoproterozoic while intrusiverocks instruded in late Triassic.2,study on Structure Characteristic and their origin:①we confirmed the Xinglongtai buried hill was composed by Paleozoic and Mesozoic, put forward the the structure of Xinglongtai buried hill was due to thrusting.②For the first time we introduced the grain zircon U Pb dating skill and the analysis of petrochemical characteristics in the study of evolution.③The thrusting nappe struc-ture in Xinglongtai buried hill was formed in late Triassic which was due to the N S compressional stress that are formed by Indosinian.3,Accumulation and formation patterns:①by multiple phase of tectonic movements, the overall fracture of Xinglongtai hill is well developed in the main formation period of the Dongying;②the fractured reservoirs development degree mainly controlled by three aspects :the tectonic stress field, lithology , the character and scale of local structural factors③rock physics simulation demonstrates the formation of cracks in metamorphosed rocks of different lithology in varying degrees of difficulty, with the dark mineral content increasing the fracture decreased, which form a reservoir with advantage of lithologic sequence;④T he reservoir-seal assemblages vertically with lithology as the dominant factor, the barriers are dense films, the reservoir are structural fracture.⑤Due to the multi-period tectonic movement, the buried hill have formed east, south, west, north, multidirectional Large-Scale oil widows.⑥large-scale faults , regional unconformity and several stages cracks composed the pass of the migration of oil and gas.⑦Have established the Reservoiring patterns of the metamorphic rock buried hill.4. Guided by the results of thesis research, the exploration work achieves remarkable effect:①It deploys 11 exploration wells and 7 exploration wells of which are drilled, the commercial oil and gas flow is found especially the high oil and gas production flow is found in Xinggu 12 and other 4 wells;②It breaks the recognition of high structural location control hydrocarbon accumulation in Ar buried mountain, and the oil and gas are same enrichment in the low position of the buried hill;③It breaks the recognition that the 2700 meters is the bottom oil boundary and extends it to 4700 meters;④The reported cumulative three-stage reserves of Xinglongtai buried hill belt is 2.4×108t which forms a hundred million tons reserves, so it lays a good foundation for an annual production of 100 million tons of crude oil in this area.
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