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The paper is guided by the theory of sedimentology,reservoir geology,earthquake geology, develop geology and the latest gas reservoir description theories from domestic and international. The main studied objects are the information of drilling, logging, earthquake and the dynamic develop data of the gas reservoir. With multi-subjects, multi-techniques synthesis methods and advanced analysis techniques, it is carried out detailed description to the sedimentary facies, structures,characteristics, faultage characteristics,crack characteristics,reservoir characteristic, stratum pressure system, fluid property and gas-water connection of the reservoir of Buhai-Xiaohelong erea.Using lasted 2D seismic analysis data and drilling data of studied area,it has new understanding and sets the development and distribution characteristics of structure and faultage,and analysis the structure and faultage influence on gas-water distribution.Taking structure distribution and reservoir as studied focus,accurate explain structure,optimum analysis studied clue,it gives accurate gas reservoir geology distribution study to realize gas turn-in stratagem in this area.Theory analysis on Buhai-Xiaohelong erea,it believes that Buhai-Xiaohelong erea is combined medium, low-abundance, low-yield energy, in the shallow, low porosity and low permeability gas reservoir of natural gas.
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