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yi ji fan ying fang cheng de jin si jie ji qi zai you qi ding liang yu ce zhong de ying yong

**Author(s):** Yang Wenkuan
**Pages:** 99-

112
**Year:** 1982
**Issue:**
2

**Journal:** *Oil & Gas Geology*
**Keyword:** 干酪根; 一级反应方程; 初次运移; 近似解; 定量预测方法; 速率因数; 碳质残渣; 地表温度; 油气预测; 时间间隔;
**Abstract:** The thermal evolution of the carbon atoms which can gradually trans-migrate from kerogen into bitumen and are called potential carbon or avail- able carbon by the author is considered as an unimolecular 1st-order re-action:V=-dB/dt=KB=aBexp(-E/RT ) (1)ln(B_p/B_0)=-sum from i=1 to p integral from (t_(i-1))~(t_i) K_idt=-sum from i=1 to p S_i (4)S_i=aΔt_i·exp(-E/RT_i) (T_i=const) (5)S_i=(1.95a Δt_i)/(ΔT_i){(T_i~2)/(E+3.07 T_i)e~(-E/RT_i)-(T_(i-1)~2)/(E+3.07 T_(i-1))e~(-E/RT_(i-1))}(T(?)const) (8)The cracking of liquid bitumen(“crude oil”)may be described byfollowing equations:V~*=dq/dt=K~*y=a~*y·exp((-E~*)/(RT)) (10)V~*=K~*(1-α_i-q_(i-1)-0.5 V_(i-1)~*Δt_i)/(1+0.5 K~*Δt_i) (16)Δq_i=0.5(V_i~*+V_(i-1)~*) Δt_i (15)q_i=q_(i-1)+Δq_i (13)y_i=1-α_i-q_i (11)Herein the symbol y shows the carbon of liquid bitumen in source rock,q is the carbon in gas and carbonic residue,a=B/B_0 is called residualratio of available carbon,a is ca. 3.292×10~7/m.y.,E is ca.15,950 cal/mol,a~* is ca.8×10~(25)/m.y.,E~* is ca.50,000 cal/mol.After putting them into practise,we found out that the equations pro-posed in this paper are helpful in quantitative prediction of petroleum.

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