阿拉伯板块塞诺曼尼亚-图尔尼世演替的层序地层学、古地理和含油气油气藏:更新综合

IF 1.8 4区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Journal of Petroleum Geology Pub Date : 2022-03-24 DOI:10.1111/jpg.12810

A. D. Bromhead, F.S.P. van Buchem, M.D. Simmons, R.B. Davies

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引用次数: 15

摘要

为了寻找新的油气藏概念和勘探机会，编制了阿拉伯板块塞诺曼—土尔盆期层序地层综合资料。综合基于已发表的数据集，这些数据集在生物地层学和同位素地层学限制的时间框架内进行了分析。高地层学分辨率使得研究区古地理可以在三级沉积层序范围内作图，并可以评价海平面上升和构造对盆地发育的相对影响。这大大提高了在整个构造板块尺度上对地层构型和沉积形态的预测。根据露头和地下观测得到的概念模型已被应用于描述陆架内盆地在沉积环境中的发育特征，这些沉积环境要么与硅塑性分离(对称陆架内盆地模型)，要么受硅塑性影响(不对称陆架内盆地模型)。层序地层模型在区域测井样条上的应用有助于理解地层结构，并对生成一套新的总沉积环境(GDE)图起到重要的控制作用。这些地图以前所未有的分辨率和尺度描绘了高相对海平面(最大洪水面和高水位系统域)和低相对海平面(低水位系统域)时期的古地理特征。这些地图由序列等径图补充，序列等径图揭示了随时间和空间的变化。这种方法有助于刻画油气系统要素的保存分布和地层构型。在Shilaif(阿联酋)、Natih(阿曼)和Sarvak(伊朗)陆架内盆地，富集的富有机质碳酸盐烃源岩是在受限缺氧条件下沉积的。这些盆地是由海侵体系域碳酸盐台地的差异沉积作用形成的。在高水位沉积过程中，沿陆架内盆地边缘发育粒状、富含粗砾岩-碎屑的碳酸盐岩储层。上覆层序中的粘土可能形成地层内封印，沉积于与海平面上升有关的海岸线退积过程中。相比之下，在Najaf陆架内盆地(伊拉克)，有大量来自阿拉伯地盾的硅塑料成分。这一流入形成了盆地近西缘碳酸盐-硅屑混合斜坡沉积体系，而在盆地中央演替中明显缺乏富有机质层段。粒状碳酸盐岩储层局限于东缘，受下伏地层中较老的烃源岩充注。GDE图记录了Cenomanian-Turonian段内这些含油气系统元素的配置，并为储层筛选奠定了基础。Cenomanian-Turonian interval被主要的中turonian不整合所打断，这是一个具有重要地质和经济意义的构造地层边界。在阿拉伯板块的南部和东部，这种不整合具有不同的侵蚀剖面，有利于形成具有勘探潜力的亚作物。识别微妙的地层圈闭是具有挑战性的，但通过将GDE相与每个层序的绘制保存极限相结合，可以识别出具有潜在喀斯特增强作用的富含砾岩的储层相被区域性粘土岩封闭覆盖的区域，以及具有潜在亚层圈闭潜力的高品位区域。

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查看原文本刊更多论文

SEQUENCE STRATIGRAPHY, PALAEOGEOGRAPHY AND PETROLEUM PLAYS OF THE CENOMANIAN – TURONIAN SUCCESSION OF THE ARABIAN PLATE: AN UPDATED SYNTHESIS

In order to facilitate the search for new play concepts and exploration opportunities, a sequence stratigraphic synthesis of the Cenomanian–Turonian interval of the Arabian Plate has been compiled. The synthesis is based on published datasets which have been analysed within a temporal framework constrained by biostratigraphy and isotope stratigraphy. The high stratigraphic resolution allows the palaeogeography of the study area to be mapped within 3rd order depositional sequences, and the relative influence of eustacy and tectonics on basin development to be evaluated. This significantly improves the prediction of stratigraphic architecture and depositional morphology at the scale of the entire tectonic plate.

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来源期刊

Journal of Petroleum Geology 地学-地球科学综合

CiteScore

3.40

自引率

11.10%

发文量

审稿时长

6 months

期刊介绍： Journal of Petroleum Geology is a quarterly journal devoted to the geology of oil and natural gas. Editorial preference is given to original papers on oilfield regions of the world outside North America and on topics of general application in petroleum exploration and development operations, including geochemical and geophysical studies, basin modelling and reservoir evaluation.