| Jiangsu lower Yangtze area is in the southeast of Huaiyin-Xiangshui and Tanlu fracture, and the area have sea facies aggradation distributing in middle and south of Jiangsu Province. In tectonic framework, it is in the east of the lower Yangtze area of the east of the Yangtze plate. The exploration acreage is about 77,000 km2. The area had come through many times reformation of tectonic cycle, the tectonic distortion of marine facies Mesozoic group and Proterozoic erathem were very intricate. The article used multi-method of geochemistry to research character of making hydrocarbon and evolvement of marine facies Mesozoic group and Proterozoic erathem, and distributing and source of oil and gas show, and took apart pool character and a period of time, and discussed control factor of pool, and etc. We obtained as follows main cognition:Marine facies Mesozoic group and Proterozoic erathem oil source rock came through many times tectonic movement, and formed many times course of making hydrocarbon. We got across many analyse artifice , for example fission track , vitrinite reflectance ratio, inclusion temperature , the evolvement character of clay mineral etc, and created complex imbed history in many gyration evolvement area. According as these, we resume many times making hydrocarbon history of oil source rock. The whole area accumulative total maked 14,623 bill ton oil, and 637,919 thousand bill square gas , add up 652,542(bill ton, thousand bill square). Most of phase making hydrocarbon quantity is Silurian period, the second is Late Cretaceous, Carboiferous to Permian , Cambrian to Ordovician, Triassic, early Tertiary, every part is 39.3%,14.5%,14.3%,11%,10.5%,9% of total making hydrocarbon quantity. Thereinto, afternoon is quarter of all. The larger area of the lower Proterozoic erathem making hydrcarbon intension is in Subei . The larger area of the higher Proterozoic erathem making hydrcarbon intension is in Jurong-Haian.Oil & gas show of marine facies Mesozoic group and Proterozoic erathem in macroscopy can set off show cincture that asphaltum in south, light oil & hydrocarbon gas & CO2 in middle, general weighty & gas in north. Using carbon isotopes and organism sign compound and character of maturity to compare, we think that asphaltum show in south cincture is from three set source rock of different carbon isotopes-lower Silurian to middle and upper Ordovician, middle and upper Cambrian lower Cambrian & Sinian; oil & oil show in middle is from source rock of Qinglong formation of lower Triassic and Permian: oil & oil show in north is from source rock of tertiary, the source rock of Yanchcng ga.; is from Qixia formation of lower Permian. The different type in south, middle and north fit separate makinghydrocarbon center from forepart in lower Proterozoic erathenu afternoon in upper Proterozoic erathem and indentation in tertiary.Using inclusion analysis technology, we made sure times of representative pool in this area. Jurong pool is once-form, the time is about 90Ma. The time just grow hydrocarbon fastigium in upper Proterozoic erathem, oil & gas move active, and have good collocate relationship. Zhujiadun natural gas store have two times to immit, firstly is Sanduo formation sediment time that natural gas immit less and have little inclusion; secondly is Yancheng formation sediment time that is gas store main form time and have much inclusion. Huangqiao gas store have three times to immit,firstly is in about 90Ma that mostly immit oil & gas; secondly is in about 60Ma that mostly immit oil & gas and have CC moving and form store; the third is in about 25Ma that CC2 immit and drive out early hydrocarbon. The result of analysis form store's times, the area's oil & gas store of preserving now were form later, after late Cretaceous at all, these ideas explain that hydrocarbon and store form later is important to prospect for this area and have real sense.The base on analysis course of making hydrocarbon and evolvement> oil & gas show and character of oil & gas store, after we researched the type of...
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