准噶尔盆地西北缘烃源灶迁移演化及其对油气藏的定位作用

Oil accumulation related to migration of source kitchens in northwestern margin structural belt, Junggar Basin

柳波 刘定勇 郭天旭 黄志龙 刘振宇 吴凡

Liu Bo Liu Dingyong Guo Tianxu Huang Zhilong Liu Zhenyu Wu Fan

东北石油大学 非常规油气成藏与开发省部共建国家重点实验室培育基地,黑龙江 大庆 163318 中国石油大学 油气资源与探测国家重点实验室,北京 102249 中国地质调查局 油气资源调查中心,北京 100029 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

Accumulation and Development of Unconventional Oil and Gas, State Key Laboratory Cultivation Base Jointly-constructed by Heilongjiang Province and the Ministry of Science and Technology, Northeast Petroleum University, Daqing, Heilongjiang 163318, China State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China Oil & Gas Survey, China Geological Survey, Beijing 100029, China Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China

根据油气源对比、成藏期次及烃源灶迁移演化分析认为，3套烃源灶的迁移演化控制了准噶尔盆地西北缘现今油气的分布：佳木河组气源灶早期生成的天然气没有保存下来，现今气源灶的位置控制了气藏的分布；风城组烃源灶在玛湖凹陷中心已处于过成熟阶段，只有灶缘还在生成油气，控制了其贡献的油气藏也主要分布在西北缘两翼；乌尔禾组烃源灶成熟演化总体相对滞后，凹陷中部仍处于大量生油气阶段，来源于该套烃源灶的油气藏也主要分布在西北缘地区的中部。单个烃源灶在不同地质时期供烃强度不同，多个烃源灶在同一地质时期供烃强度也不同，所以在西北缘不同地区形成了不同的烃源灶供烃模式，控制了油气藏的分布格局。

According to the analyses of hydrocarbon-source correlation, hydrocarbon accumulation periods and source kitchen migration, the present hydrocarbon distributions in the northwestern margin of the Junggar Basin are controlled by three sets of source kitchen migration. The natural gas which generated during the early stage from source kitchens in the Jiamuhe Formation has not been preserved, and the present location of source kitchens controls reservoir distribution. The source kitchens in Fengcheng Formation at the centre of the Mahu Sag can not generate gas since they are over-matured. Only the source kitchens at the margin of the sag can generate hydrocarbon and control the location of oils generated from them. The source kitchens in Wuerhe Formation can still generate oil and gas in the center of the sag and also control the location of oil generated from them. Because of the different hydrocarbon-generation intensity for the same source kitchen during different geological periods and different source kitchens at the same geological period, different hydrocarbon supply modes develop and control the location of hydrocarbon in the northwestern margin of Junggar Basin.

国家重点基础研究发展计划（973）项目（2006CB202300）和国家青年自然科学基金（41202101）资助。

https://doi.org/10.11781/sysydz201306621