北美典型致密油区可采资源富集规律

doi:10.3969/j.issn.1672-7703.2018.04.007

摘要/Abstract

摘要： 致密油可采资源的富集规律一直是现阶段研究的热点问题。主要基于多个全球性非常规数据库资料，获得致密油盆地资源分布情况，重点解剖北美威利斯顿盆地、二叠盆地和海湾盆地3个致密油高产盆地，结合上千口典型致密油井实际产量数据，依次从致密油烃源条件、地层组合特征和局部甜点发育情况等三方面分析致密油可采资源富集的控制因素，为北美以外地区致密油的勘探提供依据。研究结果表明，全球致密油可采资源，平面上主要分布于美洲科迪勒拉山前带、俄罗斯西西伯利亚、北非—中东古特提斯域等常规油气较发育区；层系上以上侏罗统、白垩系、上泥盆统、中—下二叠统、上志留统为主，与全球广泛性发育的主力烃源岩相对应。致密油可采资源有3条富集规律：紧邻广泛性分布的高丰度、成熟度适中的烃源岩；以源间式和互层式地层组合类型为主的致密油层系资源最富集；在靠近沉积中心且构造活动较弱的盆地斜坡带上发育甜点区。

关键词: 致密油, 北美, 可采资源, 分布特征, 富集规律

Abstract: The accumulation law of recoverable tight oil resources has been a hot point in present studies. The distribution of oil resources in tight oil basins is firstly investigated based on multiple global unconventional databases, especially in three basins with high tight oil production:the Williston Basin, Permian Basin, and Gulf Basin in North America, and then control factors on the accumulation of the recoverable tight oil resources are analyzed from the conditions of hydrocarbon sources, the characteristics of stratigraphic assemblages, and the development of local sweet spots, based on field production performances of thousands of typical tight oil wells, with the purposes for providing basic data for the exploration of tight oil outside North America. The study results indicate that, geographically, recoverable tight oil resources are mainly distributed in conventional oil and gas areas such as the Cordillera front belt in the Americas, the Western Siberia in Russia, and the Paleo-Tethys region in North Africa-the Middle East; and geologically, they are dominant in the Cretaceous, Upper Devonian, Middle-Lower Permian and Upper Silurian formations, and related to the primary source rocks developed all over the world. These recoverable tight oil resources show three accumulation laws:close to extensively distributed source rocks with high abundance and moderate maturity; in tight reservoirs dominated by inter-source and interbedded assemblages; and in sweet spot zones developed on the slope belt close to sedimentary centers and weak in tectonic activity.

Key words: tight oil, North America, recoverable resources, distribution characteristics, accumulation law

中图分类号:

张新顺, 马锋, 王红军, 王克铭, 李文浩, 秦雁群. 北美典型致密油区可采资源富集规律[J]. 中国石油勘探, 2018, 23(4): 58-66.

Zhang Xinshun, Ma Feng, Wang Hongjun, Wang Keming, Li Wenhao, Qin Yanqun. Accumulation laws of recoverable resources in typical tight oil zones in North America[J]. China Petroleum Exploration, 2018, 23(4): 58-66.

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