塔里木盆地台盆区中上奥陶统烃源岩排烃史  

Hydrocarbon Expulsion History of Middle-Upper Ordovician Source Rocks in Tarim Basin

作　　者：梁则亮[1] 刚文哲[2] 叶治续[3] 

机构地区：[1]中国石油新疆油田分公司勘探开发研究地球物理研究所,乌鲁木齐830013 [2]中国石油大学,北京102249 [3]中国石油冀东油田分公司勘探开发研究院,河北唐山063000

出　　处：《新疆石油地质》2008年第1期53-56,共4页Xinjiang Petroleum Geology

摘　　要：通过对台盆区中、上奥陶统烃源岩空间展布及地质、地球化学特征的研究,根据吸附作用模型计算烃源岩排烃效率,建立了中、上奥陶统烃源岩的排烃史模型,并计算了台盆区中、上奥陶统烃源岩在各地质历史时期的排烃强度和排烃量。台盆区中、上奥陶统烃源岩排油量与排气量分别为325.10×108t和610.25×1011m3,总排烃量811.35×108t,主要排烃期为中、晚奥陶世与志留-三叠纪2个阶段;灰质烃源岩排烃中心主要分布在北部凹陷隆起区、塔中隆起、巴楚隆起南部以及麦盖提斜坡部分地区,泥质烃源岩排烃中心主要分布在满加尔凹陷与阿瓦提凹陷。The Middle-Upper Ordovician source rocks are one of the main marine source rocks in Tarim basin. This paper studies the spatial distribution and the geological and geochemical characteristics in the Middle-Upper Ordovician source rocks, estimates the hydrocarbon expulsion efficiency of them by adsorption model and develops the model for simulating the hydrocarbon expulsion history of such source rocks, obtaining the intensity and the quantity of hydrocarbon expulsion of them in each geological history time. The oilexpelled quantity and gas-expelled quantity are estimated by 325.10×10^8t and 610.25×10^11m^3, respectively, totaling about 811.35×10^8t in hydrocarbon expulsion quantity. The main hydrocarbon expulsion time for calcareous source rocks is in the Middle-Late Ordovician and the Silurian-Triassic, centering in uplift of north sag, Tazhong （central Tarim） uplift, southern Bachu uplift and partial area of Maigaiti slope; the hydrocarbon expulsion center for muddy source rocks is mainly in Manjiaer sag and Awati sag.

关 键 词：塔里木盆地 中奥陶统 上奥陶统 烃源岩 排烃量 强度 

分 类 号：TE112.11[石油与天然气工程—油气勘探]