新疆石油地质

新疆石油地质 ›› 2006, Vol. 27 ›› Issue (1): 127-133.

• 国外油气地质 • 上一篇    下一篇

西西伯利亚含油气省北部侏罗系油气藏的渗容特征随埋深的变化规律

Г.Г.谢明, А.Ю.涅哈耶夫   

  1. 俄罗斯科学院西伯利亚分院石油与天然气研究所,俄罗斯新西伯利亚630090
  • 收稿日期:2005-10-08 发布日期:2020-10-19
  • 作者简介:Г.Г.ШеминДокторгеоюго-минералогическихнаук.（Tel）007- 383- 3356420（E- mail）veraa1@ngs.rn.

Poroperm Char acter istics and Their Var iation with Changing of Bur ied Depth of Jurassic Reservoir s in Nor th Par t of West Siber ian Province

G. G. Xiemin, A. U. Niehaev   

  1. Research Institute of Oil and Gas, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090, Russia
  • Received:2005-10-08 Published:2020-10-19

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摘要： 在侏罗系油气藏地区划分和对大量分析资料（ 约8 000 有效孔隙度和粒间渗透率样品）分析的基础上,阐明了侏罗系粒状储集层的渗容特征,并查明了它们随埋藏深度而变化的规律。指出,侏罗系油藏储集层总的特点是具有中、低孔隙度和较低、低的渗透率。在区域性的油气藏中,牛津阶和巴统阶具有最大的渗容值,而阿林巴依奥斯阶和托阿尔阶的渗容值较低,普林斯巴赫和赫唐- 辛涅缪尔阶渗容值最低,而生产层$Ю_{1}^{1}-Ю_{1}^{4}$,Ю2,Ю3 层的特点是中等孔隙度和中等、较低的渗透率。油气藏储集层的渗容值取决于储集层的埋深,上侏罗统砂具有中等有效孔隙度和粒间渗透率,孔隙度由14.2%降至11.2%,粒间渗透率由19.62×10- 3μm2,降至236×10- 3μm2,而下侏罗统在2 750—3 750 m,有效孔隙由14.8%降至7%,粒间渗透率由7.90×10- 3μm2 降至0.03×10- 3μm2,4 250 m 以下,侏罗系粒状储集层的分布空间有限,其含油气远景可能与欠压实次生作用和裂隙型储集层的发育带有关。随着储集层埋深的加大,渗容值降低,这主要与上覆地层压力作用下的压实作用有关。

关键词: 油气藏, 储集层, 渗容特征, 有效孔隙度, 粒间渗透率

Abstract: The regional classification of Jurassic reservoirs and a great deal of data about porosity and permeability of 8 000 samples are analyzed. It is pointed out that the Jurassic reservoirs are generally characterized by moderate-low porosity and lower permeability, where the Oxfordian and Bathonian stages are of the maximum values, while the Alinbayios and Toar stages the relatively low, and the Plinsbahe and Hettangian-Xinemuer stages the minimum. The pay zones$Ю_{1}^{1}-Ю_{1}^{4}$,Ю2,Ю3 are moderate in porosity and moderate-lower in permeability. How well the poroperm characteristics of these reservoirs depend upon the buried depths of them. The Upper Jurassic sands are moderate in effective porosity ranging from 14.2% to 11.2% and intergranular permeability from 236×10-3μm2 to 19.62×10-3μm2; the Lower Jurassic sands (in depth of 2 750—3 750 m) range from 14.8% to 7% and from 7.90×10-3μm2 to 0.03×10-3μm2; below depth of 4 250 m the granular reservoirs of Jurassic are in limited distribution, their petroleum potentials are possibly related to secondary undercompaction and fractured reservoirs development. It is concluded that the values of poroperm characteristics of Jurassic reservoirs in northern West Siberian province are decreased with the buried depth due to different compactions of the overburden pressures.

Key words: oil-gas pool, reservoir rock, poroperm characteristics, effective porosity, intergranular permeability

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