川东北地区上二叠统大隆组烃源岩生烃动力学应用

为了确定川东北地区大隆组烃源岩的生烃特征,选取广元矿山梁大隆组的暗色泥岩进行了Rock-Eval（开放体系）热模拟实验。同时选取飞仙关组抽提物进行了金管（密闭体系）热模拟实验以确定大隆组原油裂解成气特征。通过热模拟实验数据对成烃动力学模型进行标定。标定的大隆组泥岩样品动力学参数揭示其样品活化能主要分布在（190—230）kJ/mol之间,平均活化能为212 kJ/mol。川东北地区大隆组成烃史指出大隆组烃源岩自210 Ma左右开始大量生烃,到170 Ma（中侏罗世）干酪根生烃基本结束。油裂解成气主要发生在（180—160）Ma期间。川东北地区大隆组开江-梁平海槽和广元-旺苍海槽内平均生气强度为（10—20×10⁸）m³·km²,大隆组烃源岩累计生气量达到32.63×10¹²m³。大隆组烃源岩生烃期短,成烃期较晚,对成藏贡献大。

Chemical Kinetics application of Hydrocarbon Generation of Upper Permian Dalong stratum in the northeastern Sichuan Basin

To determine hydrocarbon source rock characteristics of Dalong stratum in the northeastern Sichuan Basin,it is selected dark mudstone in Kuangshanliang of Guangyuan to launch Rock-Eval (open system) thermal simulation, and Brass instrument thermal simulation ( closed system) is done e to determine the gas characteristics cracking from crude Generation by Dalong Stratum and Migration into Feixianguan Stratum.Through thermal simulation data to demarcate a kinetic model, the Dalong Stratum mudstone samples reveal the kinetic parameters of activation energy is mainly distributed in 190-230 (kJ/mol), the average activation energy is 212(kJ/mol).Oil and gas generation history indicates that the considerable hydrocarbon generation geological time around 210Ma to 170Ma (Middle Jurassic), and basically get termination hydrocarbon generation after 170Ma (Middle Jurassic), oil cracking gas occurs mainly in the period 180-160Ma. Oil and gas generation history is short and late of Dalong Stratum source rocks, made great contributions to the accumulation.