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| 1 | 歧口凹陷古近系沙河街组热液作用及其对湖相碳酸盐岩储层的影响显示文摘综合利用岩心薄片观察、流体包裹体和地球化学分析手段,研究歧口凹陷古近系沙河街组沉积时期热液活动对湖相碳酸盐储层物性的控制作用。结果表明:碳酸盐岩地层中广泛发育鞍状白云石,同时伴生黄铁矿和石英;多数碳酸盐岩样品富集轻稀土元素,Eu正异常明显,同时具有较低的87 Sr/86 Sr比值;流体包裹体均一温度普遍高于埋藏时的古地温;研究区热液活动对碳酸盐岩储层有着明显的改造作用。在深部富CO2热液的侵蚀下,碳酸盐岩形成大量溶蚀孔、扩大溶蚀缝和晶间孔,储层物性有着明显的改善;但随之产生的白云岩化作用在一定程度上堵塞已形成的孔隙,给物性带来负面影响;歧口凹陷热液碳酸盐岩储集相被深大走滑断裂所控制,在负花构造部位最为发育,热流体上涌的根源可能为新近系的广泛热事件。 | 杨扬 高福红 蒲秀刚 | 2020 | 中国石油大学学报(自然科学版)2020，44，2： | 4 |
| 2 | Base level changes based on Basin Filling Modelling:a case study from the Paleocene Lishui Sag,East China Sea Basin显示文摘Estimation of base level changes in geological records is an important topic for petroleum geologists.Taking the Paleocene Upper Lingfeng Member of Lishui Sag as an example,this paper conducted a base level reconstruction based on Basin Filling Modelling(BFM).The reconstruction was processed on the ground of a previously interpreted seismic stratigraphic framework with several assumptions and simplification.The BFM is implemented with a nonlinear diffusion equation solver written in R coding that excels in shallow marine stratigraphic simulation.The modeled results fit the original stratigraphy very well.The BFM is a powerful tool for reconstructing the base level,and is an effective way to check the reasonableness of previous interpretations.Although simulation solutions may not be unique,the BFM still provides us a chance to gain some insights into the mechanism and dynamic details of the stratigraphy of sedimentary basins. | Jing-Zhe Li Pi-Yang Liu Jin-Liang Zhang Shu-Yu Sun Zhi-Feng Sun Dong-Xing Du Ming Zhang | 2020 | Petroleum Science2020，17，5： | 0 |
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