Research Of Fluid Inclusion In Cambrian-Ordovician Reservoir At Yingmai 7-Yaha Region In Northern Tarim Basin

Yingmai7-yaha district which located in the north of upheaval in Tarim Basin,is one of the most oil and gas enrichment areas.Based on comprehensive analysis,such as fluid inclusions,ore-bearing veins,temperature and salinity,fluorescence and component,we studied on crack stage of veins which contains hydrocarbon inclusions,ESR time of quartz veins,temperature,the depth related to sedimentary burial history,characteristics of oil and carbon isotope and so on;divided stage of hydrocarbon inclusions;confirmed the time of accumulation;deduced the oil and gas filling path;all of those are important to guide the next exploration,and owing realistic significance.Through the research,some main achievements and cognition we get goes as follows:The hydrocarbon inclusions in Yingmai7 district can be divided into four stages,they are brown high matured oil inclusions in stage ?,yellow medium matured normal inclusions in stage ?,blue light oil inclusions in stage ? and dark grey gaseous hydrocarbon inclusions in stage ?.The distribution of Stage ? and stage ? is limited,but stage ? and stage ? are widely distributed.The brown-yellow-blue high matured light oil in stage ? and blue high matured condensate oil and gaseous hydrocarbon inclusions in the stage ? are mainly appeared in Yaha district.Stage ? widely distributed,experienced from low matured to high matured evolution process.The distribution of stage ? is limited.Systematic determine was used for homogenization temperature in stage ?,the depth and time of formation was estimated.For the first time we used ESR year to ensure the form time about hydrocarbon inclusions in stage ? and stage IV.ESR age of Inclusions in stage ? is 16.3-23.5Ma,belongs to early Himalayan;ESR age of Inclusions in is 8.5 Ma,belongs to Late Himalayan.Pr/Ph and carbon isotope analysis results show that crude oil in Yingmai7-yaha district comes from continental hydrocarbon source rocks in northern kuche depression,formed in the stage ? and stage ?.To sum up,there are 4 reservoirs in yingmai7-yaha district.Late caledonian to early hercynian,oil-gas in stage 1 from Cambrian-ordovician source rocks filling to this local areas;Late hercynian,oil-gas in stage ? comes fromCambrian-ordovician source rocks from south to north along the way that stage I to yingmai32 district.Early Himalayan,light oil-gas from continental filled in from north to south;Late Himalayan,condensate oil-gas from continental filled in from north to south,then formed condensate reservoir in Yaha district;A large number of light component of natural gas removed to yingmai7 district,and the two period of oil-gas when filling in Himalayan has dicisive effection on the reservoir.