Burial History Of Source Rock In Oil-gas Bearing Basin And Its Relationship To Reservoir Formation

The main task of this article is analysing the major source rock's burial history of oil-gas-bearing basin in china and in other countries ,and researching different burial history type basin's reservoir characteristic,and relationship between the phase of reservoir formation and different burial history type basin.the basic thoughtfulness is firstly analysing the rebuilding burial history theory and ways,then classifing and analysing the source rock's burial history of oil-gas bearing basin in china and in other countries,and analysing the reservoir characteristic of different burial history type basin and reservoir formation phase of different burial history type basin.There are three types of burial history,they are subsidence type, uplift type;and there are two types for uplift type, one is subsidence-uplift type the other is subsidence-uplift-subsidence type .statistical analysis shows that there are 28 basins in china, 25 basins is uplift type, it is 89.7% or so ,and 3 basins is continuing subsidence type,it is 10.3% or so.there are 36 basins that is uplift type in other countries,it is 53%,and 32 basins is continuing subsidence type,it is 47%.The maximal depth of source rock in china is distributed in 3000-4000 metres,the average subsidence rate of a basin is no more than 100 metres each million year ,and maximal subsidence rate is more than 300 metres each million year;the uplift rate is also no more than 100 metres each million year, and maximal uplift rate is more than 300 metres each million year,the maximal degradation thickness is more than 2000 metres.There are 3 types of reservoir for the continuing subsidence type basin, there are diapir reservoir, fault reservior, drape reservoir, and the source rock is apart from the reservoir,they are contact by fault; and there are anticline reservoir, fault reservoir, incline reserve ir,mudstone reservoir under the denudation area, and the source rock is contact with the reservoir.The phase of reservoir formation can be the period when the basin is the subsidence such as the reservoir of Shixi 2 well, Shi 002 well, Shi nan 4 well, Cai san 2 well in Zhungeer basin, Tuo 76 well; the phase of being reservoir can be the period when the basin is the uplift such as the reservoir of Songliao basin, Miyang basin, Dongpusag, Eerduosi basin, Yaqi basin.