| Huangqiao si located in the southwest of Huangqiao town of the Taixing city,belongs to the transition zone between Subei depression and Sunan uplift, Huangqiao slope.In recent years, a large number of oil-bearing strata were founded in Upper Paleozoic of Huangqiao region, for example,carbon dioxide gas reservoir was founded in the the Qixia group, and put into development achieved significant economic benefits.Recently, for breakthrough in the oil and gas exploration reserves,the intensity of exploration is greatly enhanced.Especially in the Permian Longtan Formation of the Upper Paleozoic, Qixia group, as the research of hydrocarbon migration and accumulation system have great significance in reduce the risk of exploration, lower the capital investment for exploration and speed up the process of exploration, so research of Upper Paleozoic Permian hydrocarbon migration and accumulation system is necessary and of great significance。Rocks of Upper Paleozoic, Permian reservoir in Huangqiao areas has a poor capacity of storage and infiltration, it belongs to low porosity and low permeability reservoir rock-non-reservoir rock。This thesis is mainly based on the description of the single well data, to make up oil and gas migration and accumulation model, Use the skills just as the strata wave impedance inversion, Coherence analysis, Velocity analysis and so on to conduct oil and gas ease and description of the reservoir system.That is three aspects were discussed in this paper,that is the distribution characteristics of Permian cap. The growth characteristics of holes sewn and the impact of break in oil and gas migration.During the study, we can find that Qixia group of Upper Paleozoic Permian is mainly of carbonate strata, Dalong group-Longtan group-Gufeng group in Permian are mainly of clastic rocks。 The cap rock development in the work area is mainly of abnormal pressure of cover type in Dalong group-Longtan group, the cracks are mainly distributed in the Permian clastic rocks fracture development band、the holes are mainly located in the Permian Xixia Carbonate. Tectonic movement and its fracture have great significance in constructing micro-crack formation and distribution, cracks in Huanglong group and cracks and caves caused high-yield carbon dioxide gas flow in Qixia group all have a close relationship with the fracture, Fracture has great significance in improve the stratigraphic accumulation performance as well as oil and gas re-migration.The above studies the Permian strata of the Upper Paleozoic crack with kongjiaqiao well-Su174well fracture zone, N4well-Changshengl well fracture zone and Haian-Rugao of fracture zone; cover the area of the Dalong-Longtan Formation abnormal pressure of cover area;there were fault system in the NE-NNE fault system and the NWW trending fault system. |
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