| By comprehensive utilization of seismic, logging, production testing and other related datum , the accumulation law of the Sudeerte Xing'anling Group is studied. Through using the biomarkers, similarity of aromatic content, analysis of gas chromatography and other geochemical index , we can determine that primary oil of Xing'anling Group is mainly from the oil source rocks of Nantun group with a small amount from Xing'anling Group source rocks.Through core observation ,section identification and other related materials ,it is known that theâ… andâ…¡pay sets of the reservoirs of Xing'anling group are composed of transitional rock between pyroclastic debris and normal sediment clastic debris; the reservoir pore type of Xing'anling Group is mainly the primary pore, followed by the crack-cavity pore.By studying the cap rock and its seal ability ,it indicates that the main cap rock is Xing'anling Group mudstone cap rock and the mudstone of the memcer 1 and 2 of Nantun group. There exist capillary seals and abnormal fluid pressure seals in the caprock.The results of comprehensive evaluation of reservoir show that the relative good reservoirs are theâ…¢andâ…£pay sets in the west of Bei 16 block,â…£,â… andâ…¡pay sets of Bei 14 block,â…£andâ…¢pay sets in the east and north-east of Bei 28 block.Combining with genesis, reserve, cap and preservation conditions, we can know that fault block reservoir and fault-lithological oil pool are the main types of reservoirs of Xing'anling Group and the oil-gas reservoir forming and distribution are controled by source rock, migrating channels and the types of traps.
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