摘要
在深入研究川西地区上三叠统烃源岩埋藏史的基础上,应用实测烃源岩地球化学参数与盆地模拟相结合的方法,对川西地区上三叠统烃源岩的热演化史进行了研究,结果表明,川西地区上三叠统烃源岩演化程度较高,处于成熟~过熟阶段,实测Ro为0.84%~2.14%,通过拟合公式计算出烃源岩生油门限深度约为2119m。7口单井的模拟研究表明,川西地区南部平均古地温梯度较高,为36.5℃/km,北部偏低,为34℃/km,但受构造运动影响,南部烃源岩沉积厚度较薄,埋深浅,因此其成熟时期要晚于北部。
Based on the deep research of burial history of Upper Triassic in Chuanxi area,the source rock thermal evolution history was analysed using measured values of geochemical parameters and basin modeling.The results indicate that the source rock of Upper Triassic reached the stage of middle and late maturity,and the Ro ranged from 0.84% to 2.14%.The depth of oil generative threshold is about 2119m.The modeling of seven wells show that the average palo-themal gradient in south of Chuanxi area is relatively high,about 36.5℃/km,and the average palo-themal gradient in north of Chuanxi area is about 34℃/km.However,under the influence of tectonic,the source rock in south of Chuanxi area had characteristics of thinner thickness and lower burial,and its mature phase is later than that in north of Chuanxi area.
出处
《内蒙古石油化工》
CAS
2010年第13期118-120,共3页
Inner Mongolia Petrochemical Industry
关键词
川西地区
热演化史模拟
镜质体反射率
成熟度
Chuanxi Area
Thermal Evolution Modeling
Vitrinite Reflectance
Maturity
