The Kuidong Tectonic Zone-the Yannan Fault Zone, Hydrocarbon Source Rock Evaluation And Oil And Gas Characteristics

Liaohe tidal zone Liaohe Oilfield important resource replacement, source rocks and oilsource is relatively weak, shallow source rocks the oil-generating capacity, the mainhydrocarbon kitchen, the source beds, migration, accumulation and distribution patterns. Theproblem is not very clear.-Geochemical characteristics of the the Yannan fault zone sourcerocks on the the Kwai east tectonic belt use in the previous studies on the basis of the evaluationmethods of organic geochemistry, migration and accumulation of oil source to explore, toachieve the following understanding.Kuidong well geochemical system evaluation reveal the southern section of the eastern seabeach Kuidong tectonic belt development Shahejie group of three sections of dark graymudstone with brown-gray with gray thick mudstone, with a total thickness of593m. Show thatthe eastern region of sea beach Shahejie Formation source rock extended to the Yannan faultzone, the area has a rich material basis for generating oil and gas.Controlled by the tectonic evolution and sedimentary conditions construct of Kuidong-theYannan fault zone, hydrocarbon source rocks, forming the cover islet hydrocarbon kitchen,development of thick Shahejie group-Dongying Formation source rocks, organic matterabundance, type and The evolution of the degree of comprehensive evaluation indicates that:Shahejie group of three sections of hydrocarbon source rocks of the highest type of good is themain source rocks; Shahejie hydrocarbon source rocks is also higher, type, better and more hasreached maturation stage is the secondary source rocks in this area. Furthermore, depression inthe eastern sea beach, Dongying Formation of three sections of abundance of organic matter wasalso higher, slightly better type to achieve a better level of source rocks, some of the maturitystage, a local source rocks.Eastern Beach Sea source rocks of hydrocarbon generation amount and the amount ofresources were calculated.Kuidong structure, the Yannan buried hill oil and gas physical characteristics andgeochemical characteristics show: Kuidong of crude oil stored in the shallow Dongyinggroup, normal oils and some mild biodegradable oil, low wax content and low freezing pointhigh glial asphaltenes, low viscosity; Yannan buried hill crude shallow depth, the degradation ofheavy oil, normal oil-before the peak of mature crude oil.Controlled by the tectonic evolution and sedimentary conditions construct of Kuidong-theYannan fault zone, hydrocarbon source rocks, forming the cover islet hydrocarbon kitchen,development of thick Shahejie group-Dongying Formation source rocks, organic matterabundance, type and evolution degree assessment Kuidong structure-the the Yannan fault zoneoil source from the cover islet depression depression, the main source rocks Shahejie group,followed by the Shahejie sea Dongying group of three upper hydrocarbon source rock types maybe relevant to the crude oil, but this section of the source rock maturity is not enough, so thecontribution is limited; overland Dongying Formation source rocks with the existing reservoir is not relevant.Construct of Kuidong-the the Yannan fault zone oil and gas migration and accumulationof oil and gas exploration potential of the preliminary analysis shows that: the Yannan fault asthe main migration pathway; the period of oil and gas migration eastward advantage of lateralmigration, the eastern sea beach has the resource base of the formation of large oil and gas fieldsand superior accumulation geological conditions.