Hailar Basin Hydrodynamic Simulation Of Hydrocarbon Migration And Accumulation Characteristics - To Wuerxun, Beier Depression, For Example,

Wuerxun and Beier depression are regarded as prosperity in exploration.lt is very important that the Palaeo-Hydrodynamic effect on the hydrocarbon migration and accumulation. And then the palaeo-hydrodyonamics during different geologic periods are restored in Wuerxun and Beier depression. What has been done wants to explore the feature of hydrocarbon migration and accumulation in this two depression.During research, the background of palaeo-hydrodyonamics has been analyzed for the first time. A large quantity of information of geology,test,well logging and earthquake has been well used. Basing on comprehensive study and moving analysis, the really geological pattern is selected and the hydro-dynamical field is described using mathematics. And then the hydrodynamic is used to clue, the mathematical model on hydrodynamic fitting to Wuerxun and Beier depression has been set up. It is burial and fluid pressure development history and so on . the time and space domains is solved by the method of iteration in circles and finite element respectively.The development and research at present not only about the theory of hydro-dynamic but also that of hydrocarbon migration and accumulation has been sum up in the beginning. The following are main conclusion and recognition:Firstly,basing on the study mudstone compaction,drawing a conclusion is that the profile and plane feature of palaeo-pressure in Y3, On profile, the pressure ranged from 5Mpa to 10Mpa In the southern area of wuerxun. Usually, High pressure was in n1 or t. In the northern area of Wuerxun, high pressure almost reached to 5Mpa, high pressure usually was in d1 or n2. In beier depression , high pressure reached to 5Mpa, and in different area the high pressure appear in different stratum; On plane, the high pressure in the southern area of wuerxun was higher than that of In the northern area. In conclusion, the pressure was increased from southern to northern in d1 of Beier depression, however, in n2 , it was increased from Hup-2 well to northern and south-east.Secondly, having analyzing the feature of palaeo-pressure and nowadays pressure,there has had a high pressure in geologically history periods. However, there has normal-pressure or low-pressure. According to those analysis and the background of geological evolution of basin, the kind of hydrodynamics was regarded as compaction before y3 and then as compaction-osmosis after y3.Futhermore,the key time of Oil and gas reservoir formation was summarized, It isFurthermore, the main cause of high pressure formation was believed that the compaction was not enough in paleogeothermal gradient, meanwhile, analyzing the cause of the low pressure nowadays,it was the uplift and erosion of stratum or pressure divulgence because of seal and so on.Finally, the palaeo-hydrodyonamics of main stratum during different geologic periods was restored. It was shown that the oil potential of ys can almost be inherited from y3 to nowadays. Based on the theory of hydrocarbon migration and accumulation, the feather of hydrocarbon migration and accumulation of main stratum was analyzed and the favorable areas were forecasted, It is Su-8~su-18, Wu-7~Wu-15 well area in d1 of Wuerxun depression, and bei-17~Bei-13~ De-2,BeiD2~Bei-1 well area in n of beier depression.