新疆石油地质

›› 2016, Vol. 37 ›› Issue (5): 1-1.doi: 10.7657/XJPG20160505

• 论文 •    

应用定量颗粒荧光恢复莫索湾凸起侏罗系油气充注史

麻伟娇1，王然2，王峰2，李秀丽1，3   

  1. (1.中国石油 勘探开发研究院,北京 100083;2.中国石油 新疆油田分公司 勘探开发研究院,新疆 克拉玛依 834000;3.中国石油集团 盆地构造与油气成藏重点实验室,北京 100083)
  • 出版日期:2019-01-01 发布日期:1905-07-16

Application of Quantitative Grain Fluorescence Technique in Restoration of Hydrocarbon Charging History of Jurassic Reservoirs in Mosuowan Swell, Junggar Basin

MA Weijiao1, WANG Ran2, WANG Feng2, LI Xiuli1,3   

  1. (1.Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China; 2.Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China;3.Key Laboratory of Basin Structure and Hydrocarbon Accumulation, CNPC, Beijing 100083, China)
  • Online:2019-01-01 Published:1905-07-16

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摘要： 准噶尔盆地腹部莫索湾凸起，在白垩纪处于构造背斜的高部位，是油气运聚的有利指向区，然而目前很少证据证明莫索湾凸起曾经聚集古油藏。选取准噶尔盆地莫索湾凸起盆参2井区典型探井莫深1井，通过定量颗粒荧光技术，对下侏罗统三工河组24个岩屑样品进行精细对比和分析，结合录井资料、构造发育、生排烃史和油气成藏期次，恢复了盆参2井区油气藏复杂的充注过程。结果表明，三工河组二段在白垩纪存在古油藏，油水界面深度为4 456 m，古近纪末喜马拉雅运动使古油藏泄漏，油水界面深度上升至4 412 m，而在新近纪，侏罗系烃源岩再次充注油气，导致现今油水界面深度为4 440 m，低于古近纪油水界面，同时还使没有古油藏的三工河组一段砂体聚集了油气。研究结果为莫索湾凸起三工河组油藏成藏史研究提供了新的证据。

Abstract: Mosuowan swell in the hinterland of Junggar basin which was located in the high position of the structural anticline during Cretaceous is the favorable area for hydrocarbon migration and accumulation. But little evidence can prove the hydrocarbon accumulation in the paleo-reservoir in Mosuowan swell. This paper selectes the typical exploration Well Moshen-1 in the Wellblock Pencan-2 in Mosuowan swell of Junggar basin, correlates and analyzes 25 cutting samples from the Sangonghe formation of Lower Jurassic in detail using quantitative grain fluorescence technique, and restores the complex reservoir charging process in Wellblock Pencan-2 based on the combined study of log data, structural development, hydrocarbon generation and expulsion history and hydrocarbon accumulation periods. The results show that paleo-reservoir occured in the second member of Sangonghe formation during Cretaceous with the water-oil contact (WOC) at 4 456 m in depth. Himalayan movement resulted in the leakage of the paleo-reservoir at the end of Paleogene and the WOC rose to 4 412 m. In Neogene, Jurassic source rocks charged with oil and gas again resulted in the present WOC at 4 440 m in depth (lower than WOC of the Paleogene) and allowing oil and gas accumulation to appear in sand bodies of the first member of Sangonghe formation under the conditions of no paleo-reservoirs. The research result provides new evidence for the study on hydrocarbon accumulation history of Sangonghe formation in Mosuowan swell

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