油气藏评价与开发 ›› 2018, Vol. 8 ›› Issue (6): 7-12.

• 油气地质 • 上一篇    下一篇

塔里木盆地下寒武统玉尔吐斯组烃源岩热演化模拟分析

郑见超,李斌,刘羿伶,肖鹏程,李琪琪   

  1. 西南石油大学地球科学与技术学院,四川 成都 610500
  • 收稿日期:2018-03-14 出版日期:2018-12-26 发布日期:2018-12-13
  • 作者简介:郑见超(1986—),男,硕士,油气成藏方向的研究。
  • 基金资助:
    四川省教育厅青年基金“深层页岩储集物性研究”(15ZA0047)

Study on thermal evolution modeling of lower Cambrian Yuertusi source rock, Tarim Basin

Zheng Jianchao,Li Bin,Liu Yiling,Xiao Pengcheng,Li Qiqi   

  1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China
  • Received:2018-03-14 Online:2018-12-26 Published:2018-12-13

摘要:

玉尔吐斯组烃源岩作为塔里木盆地重要的烃源岩之一,其热演化史至今仍缺乏较为客观的认识,从而影响下一步勘探方向的选择。在钻井资料和分析测试基础上,运用盆地模拟技术中的Easy%Ro模型,对盆地不同构造单元的玉尔吐斯组烃源岩进行热演化史及热演化差异性分析,提出有利的勘探区,对下一步深层碳酸盐岩油气藏勘探具有重要意义。研究结果表明:玉尔吐斯组烃源岩的热演化受构造运动和热液活动的双重控制,具有多期、动态差异的特征;在环满地区以及塘沽巴斯坳陷区,玉尔吐斯组烃源岩在奥陶世先后进入生烃门限,其中孔雀河斜坡和古城墟隆起东段在志留世进入生烃停滞阶段;顺托果勒底隆起西部和满西地区受热液活动的影响,分别在中二叠世初期和早石炭世初期进入生烃枯竭阶段且枯竭范围逐渐扩大;麦盖提斜坡东部地区的热演化进程明显晚于盆地其他地区,现今处于晚成熟阶段;沙雅隆起西部、顺托果勒低隆起西部、麦盖提斜坡东部以及塘沽巴斯坳陷西部斜坡带均为有利勘探区。

关键词: 塔里木, 玉尔吐斯组, 热演化模拟, 有利区带

Abstract:

As one of the important source rocks in Tarim basin, Yuertusi source rock, whose thermal evolution history is still lacking of objective knowledge which restricting the choice of exploration direction. On the basis of drilling data and analysis test, the Easy%Ro model of basin modeling technology was used to analyze the thermal evolution history and its dissimilarity of Yuertusi source rock in different tectonic units, and the favorable exploration areas were raised, that was important to the further deep carbonate reservoir exploration. The results showed that the source rocks with multiphase and differences dynamic characteristics in thermal evolution were controlled by tectonic movement and hydrothermal activity. The source rock in the ring with depression of Manjiaer and Tanggubasi entered the hydrocarbon generation threshold successively in Ordovician, but the source rock in the Kongquehe slope and eastern Guchengxu uplift entered the stagnation of hydrocarbon generation in Silurian. The Shunxi to Manxi area entered the stage of hydrocarbon generation dried up in Permian and Carboniferous and the range of depletion has gradually expanded. The thermal evolution process of the source rock in the eastern Maigaiti slope significantly was later than that of other areas; it was still in the late mature stage today. The predicted favorable zones were west Shaya uplift, west lower uplift of Shuntuoguole, east Maigaiti slope and west Tanggubasi depression slope.

Key words: Tarim, Yuertusi formation, thermal evolution modeling, exploration favorable area

中图分类号: 

  • TE122