Assessment On Source Rock Of Hydrocarbon In Binbei Area Of Songliao Basin

Binbei area of Songliao basin had been explorated several times. But all explorations have not make an substantive breakthrough yet. An area's assessment of hydrocarbon source rock , the key to the Binbei area's exploration, has very important theory significance to its exploration prospect .Based on the assimilation, induction and summary of predecessors'achievements and on the old and new wells'information, this paper make an new assessment to the hydrocarbon source rock of Binbei area. Primarily take the qualitative research, using new wells'information maked a new qualitative assessment to the hydrocarbon source rock of Binbei area. Take the quantificative assessment of hydrocarbon generation and expulsion aside, using the chemistry kinetics research method, calculated the hydrocarbon generation capacity of the source rock in Binbei area. Based on the calculation of liquid state hydrocarbon quantity, the rock adsorbed gas, the oil dissolves gas, the water soluble gas, and the proliferation spirit residual to the source rock, using the material balance principle, studied the amount of hydrocarbon generation and expulsion and the hydrocarbon history of the aimed formation. The amount of oil and gas resources has been researched, to forecast the advantageous exploration area and serve for the area's next exploration.By the calculation we can reach the result that the total oil generation is 165.801×108t, and the total gas generation is 23.714×1011m3, which is 7 times to the oil. Obviously, it is relate to the less deep depth and the low gas conversion rate, in addition to the low gas transport rate to the crude oil transport rate. It means that the quantity applied by the middle slow formation is very limited. Hei yupao depression, Qi Jiabei, Anda, Mingshui terrace of Central sag genrated the most quantity of oil and gas, so they are the main exploration target. Low production and low hydrocarbon discharge rate in Binbei area, make most gas can't drain out. So the conclusion is that the source rock condition in the north Binbei area is not good as some explores forecast.