机构地区: 西北大学地质学系大陆动力学国家重点实验室
出 处: 《地质科技情报》 2011年第5期69-73,共5页
摘 要: 运用流体包裹体测温与磷灰石裂变径迹热史模拟相结合的油气成藏年代学研究方法,系统探讨了鄂尔多斯盆地东北部上古生界油气成藏期次和时间。基于流体包裹体均一温度的分析表明,二叠系砂岩储层总体上经历了2~3期次的油气充注过程;结合单井的热演化史研究,推算油气的充注时间为168~156,148~132,32Ma。综合分析认为,鄂尔多斯盆地东北部二叠系油气成藏过程总体经历了早期(168~156Ma)低温成藏和中期(148~132Ma)高温成藏两个期次的原生油气成藏事件,以及晚期(32Ma)主要发生在上二叠统的中温次生油气成藏事件。 The homogenization temperature of fluid inclusions and AFT thermal history analysis offers the opportunity to reveal the time of oil-gas accumulation in the Upper Paleozoic of northeastern Ordos Basin.The analysis of homogenization temperature of fluid inclusions shows that the sandstone reservoirs of Permian experienced 2-3 periods of oil-gas charging process.This analysis combined with thermal evolution of single wells indicates the time of oil-gas is 168-156 Ma,148-132 Ma and 32 Ma.Therefore,the Permian sandstone reservoirs experienced low-temperature oil-gas charging process during 168-156 Ma,high-temperature oil-gas charging process during 148-132 Ma,middle-temperature oil-gas charging process in 32 Ma.