Reservoir-forming Law And Target Evaluation Of Linze And Zheduo Areas

Gaoyou sag is one of the foremost exploration areas of Jiangsu oilfield. The difficulty of exploration increased, exploration benefit decreased, but the superseded areas are still noncommittal, so the exploration complexion is comparatively serious. Therefore, we do this research, which belongs to basic and exploratory study of new developed area and new series of strata. The aim is looking for replaced areas of hydrocarbon resources by integrated studying. This study is based on comprehensive evaluation of hydrocarbon resources, the golden rule is hydrocarbon theory, the method is to explain the complex minor block subtly,evaluate oil sources and analyse hydrocarbon reservoir-forming patterns, identify trap of low SNR areas, find out complex block trap, choose advantaged traps,depict and evaluate traps subtly, provide advantaged exploration areas and well goal. The study of Linze and Zheduo exploration areas is less, using combination interpretation technic and anatomise work area's structural through-going whole, we find Gaoyou north slope,Linze south slope and Zheduo low salient show itself a salient in sag in holistic structure. Generating rock's analysis shows that oil sources of Linze middle salient and Linze north slope come from Linze basin, oil sources of Zheduo come from deep and slope of Gaoyou basin. Sedimentary facies and reservoir- caprock combination's analysises demonstrate that sand of work area is well-developed , major facies zones are subsea distributary channel,river mouth bar,frontal sand sheet and so on, these facies zones developed well and the reservoir conditions of them are favorable,which have three reservoir-cover arraies. Reverse structure reservoir-forming pattern researches point out the main migration pathways'patterns of Linze area is hydrocarbons migrate near the oil source, while the main migration pathways'patterns of Zheduo area is vertical migrate from distance. Linze area's exploration method is surrounding the oil-generation center and choosing part salients near sags, Zheduo area's exploration method is breaching step by step from south to north. According the research,there are three advantaged exploration areas and six advantaged well goals.This outcome will offer well goal for oil exploration and gist for disposing seism directly. In a word, this thesis sums up Linze and Zheduo areas'structure trellis systematic, reverses structure reservoir-forming pattern and control factors, potential of exploration and exploration thinking for the first time,and has some innovations in reverse structure reservoir-forming pattern and control factors, showing biggish potential of exploration.