THERMAL EVOLUTION AND HYDROCARBON GENERATION IN THE CAOHU SAG OF THE TARIM BASIN-BASED ON IES BASIN SIMULATION TECHNOLOGY
-
摘要: 利用IES-PetroMod盆地模拟软件,在塔里木盆地草湖凹陷单井埋藏史模拟的基础上,进行热史和生烃史模拟与分析。研究表明:1)凹陷区寒武—奥陶系烃源岩在奥陶纪中期Ro就达到0.5%,开始成熟生烃,生烃高峰期为加里东中期—海西早期;寒武系烃源岩在海西早期就已进入过成熟阶段;奥陶系烃源岩在海西早期进入高成熟生气阶段,海西晚期达到过成熟。2)东西缘斜坡区寒武系烃源岩生油高峰期为加里东中期—海西晚期;奥陶系烃源岩生油高峰期为海西期—印支期。3)库尔勒鼻凸寒武—奥陶系烃源岩在海西早期已达成熟—高成熟阶段;在海西晚期大幅抬升,停止生烃,早期生成的油气被破坏;燕山晚期—喜山期持续沉降,但埋深有限,几乎无二次生烃的可能。Abstract: On the basis of single well burial history simulation in the Caohu Sag of the Tarim Basin, studies of thermal evolution and hydrocarbon generation histories have been carried out with the IES-PetroMod basin modeling software. Several conclusions were made. a) In the sag, Ro of the Cambrian and the Ordovician source rocks had reached 0.5% during the middle Ordovician and had begun to generate hydrocarbon. The peak stage of hydrocarbon generation was from the middle Caledonian to the early Hercynian. The Cambrian source rocks had entered the over mature stage during the early Hercynian. The Ordovician source rocks had entered the highly mature gas generation stage in the early Hercynian and had reached the over mature stage in the late Hercynian. b) In the east and the west edge of the sag, the Cambrian source rocks reached the oil generation peak in the middle Caledonian and the late Hercynian. The Ordovician source rocks reached the oil generation peak in the Hercynian and the Indosinian. c) In the Kuerle uplift, the Cambrian and the Ordovician source rocks had entered the mature and the highly mature stages in the early Hercynian. During the late Hercynian, hydrocarbon generation stopped and the early hydrocarbon was destroyed. From the late Hercynian to the Himalayan, the Kuerle structural nose continued subsiding, but the burial depth was limited and there was nearly no probability for secondary hydrocarbon generation.
-
Key words:
- hydrocarbon generation /
- thermal evolution /
- basin modeling /
- Caohu Sag /
- Tarim Basin
-
[1] BURNHAM A K,SWEENEY J J.A Chemical kinetic model of vitrinite maturation and reflectance[J].Geochimica et Cosmochimica Acta.1989,53(10):2649-2656. [2] SWEENEY J J,BURNHAM A K.Evaluation of a simple model of vitrinite reflectance rased on rhemical rinetics[J].AAPG Bulletin,1990,74:1559-1570. [3] 魏志彬,张大江,许怀先,等.EASY%R.模型在我国西部中生代盆地热史研究中的应用[J].石油勘探与开发,2001,28(2):43-46. [4] 傅强,洪学海.塔里木盆地草湖凹陷含油气系统与油气勘探目标[J].石油实验地质,2001,23(2):160-163. [5] 傅强,叶茂林.塔里木盆地草湖凹陷-库尔勒鼻凸烃源岩演化[J].同济大学学报(自然科学版),2005,33(4):535-539. [6] 赵锡奎,李国蓉,付强,等.塔里木盆地草湖凹陷油气勘探的基本条件及前景分析[J].矿物岩石,2001,21(4):48-52. [7] 赵永强,王斌.塔里木盆地草湖凹陷勘探潜力与目标评价研究报告[R].北京:中国石化石油勘探开发研究院,2009. [8] 赵锡奎,何建军,张小兵,等.阿克库勒凸起构造演化与古构造研究报告[R].成都:成都理工大学,2009. [9] 胡圣标,何丽娟,汪集旸.中国大陆地区大地热流数据汇编(第三版)[J].地球物理学报,2001,44(5):611-626. [10] 邱楠生.中国西部地区沉积盆地热演化和成烃史分析[J].石油勘探与开发,2002,29(1):6-8. [11] 邱楠生.中国西北部盆地岩石热导率和生热率特征[J].地质科学,2002,37(2):196-206. [12] 李慧莉,邱楠生,会之钧,等.塔里木盆地塔中地区地质热历史研究[J].西安石油大学学报(自然科学版),2004,19(4):36-39. [13] 邱楠生,金之钧,李京昌.塔里木盆地热演化分析中热史波动模型初探[J].地球物理学报,2002,45(3):398-406. -
计量
- 文章访问数: 2895
- HTML全文浏览量: 128
- PDF下载量: 1092
- 被引次数: 0