Abstract:

According to the concept of petroleum accumulation systems and the basic principles of analytical hierarchy process,the Tertiary in Huanghua depression can be divided into four petroleum accumulation systems and sixteen subsystems.Quantitative evaluation method of petroleum accumulation system has preliminarily been established.22 geological factors in respect of source rocks,carrier rocks and traps have been selected,including organic carbon content,type of organic matter,maturity,thickness of source rock,areal coefficient of hydrocarbon delivery and intensity of hydrocarbon generation,fault,reservoir,unconformity,as well as their spacial combination.Quantitative evaluations of the elements and maturity of petroleum accumulation systems and subsystems in Huanghua depression show that the three elements,i.e.source rocks,carrier rocks and traps of the 4 systems are remarkably different,of which the Qibei system in the central part of the depression has the best development conditions,followed by the Qinan system in the same area,while the system in the south is relatively poor and the system in the north is the poorest.The maturities of the Qibei and Qinan systems in the central part of the depression are high,while those in the south and in the north are low.

Key words: petroleum accumulation system, element, maturity, quantitative evaluation, Huanghua depression, Tertiary