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AGER, 2017, 1(3): 190-202 柳河盆地致密储层主控因素及物性下限

已有 800 次阅读 2018-1-14 18:01 |个人分类:AGER期刊|系统分类:论文交流| 期刊

[主要内容]本文通过对柳河盆地柳参1井进行密集采样(岩心、岩屑),并开展铸体薄片、扫描电镜、X射线衍射、高压压汞和核磁共振等测试分析,根据实验结果探讨了下桦皮甸子组致密储层的岩石学特征、储集空间类型和成岩作用,结果表明压实作用和胶结作用是下桦皮甸子组储层致密化的决定性因素,后期构造作用在一定程度上改善了储层的物性。依据水膜厚度法厘定了致密储层的理论孔隙度下限为3.3%,最终确定研究区有效储层主要分布于下桦皮甸子组上段(埋深小于800m)。本文研究成果有助于认识柳河盆地下桦皮甸子组致密储层储集机理,为盆地内致密油气前期勘探工作提供理论依据。

Advances in Geo-Energy Research. 1(3) : 190-203 网址http://www.astp-agr.com/index.php/Index/Index/detail?id=34

Controlling factors and physical property cutoffs of the tight reservoir in the Liuhe Basin


Zhaozhao Tan, Weiming Wang, Wenhao Li, Shuangfang Lu, Taohua He

(Published: 2017-12-25)

Corresponding Author and Email: Weiming Wang, 41560387@qq.com

Citation: Tan, Z., Wang, W., Li, W., et al. Controlling factors and physical property cutoffs of the tight reservoir in the Liuhe Basin. Adv. Geo-energ. Res. 2017, 1(3): 190-202, doi: 10.26804/ager.2017.03.06.

Article Type: Original article

Abstract:
Tight gas sandstone reservoirs of the Lower Cretaceous Xiahuapidianzi Formation are the main exploration target in the Liuhe Basin in China. Petrology characteristics, reservoir space (pore space), controlling factors and physical property cutoffs of the tight sandstone reservoir in the Liuhe Basin were determined through the integrated analysis of several methods including: casting thin section, field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), mercury intrusion porosimetry (MIP), nuclear magnetic resonance (NMR) and nitrogen gas adsorption (N2GA). The sandstones dominated by lithic arkoses and feldspathic litharenites are characterized by low porosity, low permeability and strong microscopic heterogeneity. The porosity has a range between 0.48% and 4.80%, with an average of 2.26%. Intercrystalline pores, intergranular pores, dissolved pores and microfractures can be observed through the casting thin section and FE-SEM images. Compaction and carbonate cementation are the two primary mechanisms resulting in the low porosity of the Liuhe sandstones. Microfractures improve the permeability of the tight sandstones and provide pathways for fluid migration and the storage of hydrocarbon accumulations. Moreover, the theoretical cutoff of the porosity in the Xiahuapidianzi Formation tight sandstones is 3.3%.

Keywords: Reservoir space, controlling factors of physical properties, physical property cutoffs, water film, tight reservoir.

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