不整合面上底砾岩控制油气运聚的流体证据

发布时间：2018-08-17 15:34

【摘要】：准噶尔盆地腹部地区侏罗系和白垩系清水河组之间存在区域不整合面,之前有关不整合面之上底(砾)砂岩对中浅层油气藏运移与聚集的影响的研究较少,缺乏流体方面的证据。为恢复盆地内清水河组油气充注过程,选取该盆地腹部地区莫索湾凸起盆参2井区的莫深1井为典型井,结合现有地质成果,对12个岩屑样品进行颗粒定量荧光实验(QFT)。结果表明:白垩纪受风城组和乌尔禾组成熟原油充注,清水河组底(砾)砂岩存在古油层,古近纪末,喜马拉雅构造运动使得古油藏泄漏,QGF-E和TSF波谱图显示异常也证明油气有明显被排替的痕迹,侏罗纪成熟烃源岩有可能再次向底(砾)砂岩充注油气;现今研究层段原油的成熟度变化范围大,清水河组底(砾)砂岩油藏是油气聚集、调整、再接受充注的综合体现。研究结果从动态角度恢复了盆参2井区的成藏过程,为底(砾)砂岩作为优质储层和优势运移通道提供了流体证据。
[Abstract]:There are regional unconformities between Jurassic and Cretaceous Qingshuihe formation in the hinterland of Junggar Basin. Lack of fluid evidence. In order to restore the oil and gas filling process of Qingshuihe formation in the basin, a typical well Moshen 1 in the Mosuowan uplift basin of Shen2 well area in the central part of the basin was selected as a typical well. Combined with the existing geological results, 12 lithic cuttings samples were tested with quantitative particle fluorescence (QFT). The results show that the mature crude oil of Fengcheng formation and Wuerhe formation was charged in Cretaceous period, and the bottom (gravel) sandstone of Qingshuihe formation existed paleooil layer and late Paleogene. The Himalayan tectonic movement caused the oil and gas to leak out QGF-E and TSF spectra also proved that the oil and gas have obvious trace of displacement, Jurassic mature source rocks are likely to fill the bottom (gravel) sandstone again. The maturity of crude oil in the present studied formation varies greatly, and the bottom (gravel) sandstone reservoir of Qingshuihe formation is a comprehensive embodiment of oil and gas accumulation, adjustment, and recharge. The results show that the process of reservoir formation is restored from the dynamic point of view, which provides fluid evidence for the bottom (gravel) sandstone as a high quality reservoir and an advantage migration channel.
【作者单位】：中国石油勘探开发研究院;中国石油新疆油田分公司;中国石油盆地构造与油气成藏重点实验室;
【基金】：国家科技重大专项“岩性地层油气藏成藏规律、关键技术及目标评价”(2011ZX05001)
【分类号】：P618.13

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