A method is described in which the time taken for molecules evolved during simultaneous TG

The Northern Carnarvon Basin is located at the southern end of the North West Shelf of Australia. It was developed by rifting during the Jurassic-earliest Cretaceous. Heat flow and thermal maturity in seven wells, from three sub-basins, Rankin Platform and Exmouth Plateau of the Northern Carnarvon Basin, were modelled using BasinMod 1D program. Multiple thermal maturity parameters were used to constrain the influence of anomalously low vitrinite reflectance. Those Tmax data with reliable quality can be applied to correlate with vitrinite reflectance, establish thermal maturity and calibrate the modelled results. The modelled results indicated that the measured maturity data in some wells were consistent with the rift heat flow model (Jarvis & McKenzie) associated with the Jurassic rift and the earliest Cretaceous seafloor spreading events. The maximum values of heat flow were in the range from 67mW/m2 (Jurabi-1) to 105mW/m2 (Bowers-1) in the Exmouth and Barrow Sub-basins. On the Exmouth Plateau, the maximum values of heat flow were modelled to be 72mW/m2 in the Jupiter-1 well and 78mW/m2 in the Investigator-1 well. These maximum values were modelled to occur during syn-rift phase, which were 29-88% and 33-37% greater than their current heat flow values in the sub-basins and on the Exmouth Plateau, respectively. This study suggests that maturity indicators are less diagnostic of rifting thermal histories if the maximum thermal effect is associated with Cretaceous and Cainozoic burial in this basin.

运用扫描电镜观察和X 射线衍射分析等技术，在对泌阳凹陷核桃园组砂岩储集层中黏土矿物分布特征研究的基础上，从黏土矿物的形成条件和形成过程入手，详细分析了地质流体的性质、组成、流动方式、迁移速度等对砂岩储集层中黏土矿物形成和分布的影响，指出砂岩储集层中参与成岩反应的碎屑活性组分和地质流体对砂岩储集层中黏土矿物的形成和分布具有控制作用，并讨论了它们的形成机理。研究表明，黏土矿物的形成和分布能够不同程度地影响砂岩储集层的孔渗性和含油气性；高岭石发育层段与次生孔隙的发育和渗透率的增加以及油气的富集层段具有良好的对应关系。

在对南阳油田东庄次凹烃源岩评价和一维、二维地质建模研究的基础上，利用IES盆地模拟软件对东庄油田的南69井、南77井、东9井和东10井以及过东庄次凹的一条二维测线L450-612.5进行了烃源岩热演化史模拟研究。模拟结果表明：①东庄次凹核三段和核二段烃源岩主体处于生油窗内，镜质体反射率Ro介于0.5%～0.8%间，现今生油门限深度约为1920m，门限温度约为87℃；②二维烃源岩热演化模拟显示，廖庄组开始沉积时（距今大约27Ma），东庄次凹核三段Ro达到0.5%，现今Ro为0.7%～0.8%，处于中等成熟阶段早期；核二段距今约20Ma时，Ro达到0.5%，现今Ro为0.60%～0.65%，处于低成熟阶段；核一段至今仍未达到生油门限；③在距今27Ma时，二维测线L450-612.5的成熟度和温度模拟剖面显示，油气开始生成时的门限深度为2000m，门限温度为93℃，大于现今的门限深度和门限温度。