Characterization of micro-nano pore networks in shale oil reservoirs of Paleogene Shahejie Formation in Dongying Sag of Bohai Bay Basin, East China

Hu, Qinhong; Zhang, Yuxiang; Meng, Xiangbao; Zheng, Lirong; Xie, Zhihui; Li, Maowen

doi:10.1016/s1876-3804(17)30083-6

Cited by 136 publications

(70 citation statements)

References 21 publications

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“…The data processing of MICP tests is shown for sample B-13010 as an example. Springer shale samples have multiple pore-throat size distributions in μm-nm ranges, but mostly centering on 10 nm in pore-throat sizes [13]. Therefore, an intensive sampling at the high-pressure region is employed ( Figure 3C).…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, an intensive sampling at the high-pressure region is employed ( Figure 3C). For lowpressure region with a small change of intrusion volumes, the results are resized to identify the inflection points L t for each connected pore network ( Figure 3A), from which L max is calculated ( Figure 3B) to obtain the values of permeability and tortuosity via 1 and 2 [13].…”

Section: Resultsmentioning

confidence: 99%

“…The MICP method determines a range of pore structure characteristics, including a direct measurement of the bulk and particle densities, porosity, total pore volume, and median pore-throat diameter, as well as empirical estimate of total pore surface area [41], permeability with 1 [42,43], and tortuosity with 2 [11,13,44].…”

Section: Geofluidsmentioning

confidence: 99%

“…After tracer imbibition test of 24 hrs, the shale sample was lifted out of the fluid reservoir, flash-frozen with liquid nitrogen, kept at −80°C in a freezer, freeze-dried as a batch at −50°C and near-vacuum (less than 1 Pa) for 48 hours, then stored at <10% relative humidity prior to tracer mapping analyses by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) [11,13,55]. The instruments used are laser ablation system (UP-213; New Wave, Freemont, CA) and ICP-MS (ELAN DRC II; PerkinElmer/ SCIEX, Sheldon, CT).…”

Section: Fluid Imbibition and Vapormentioning

confidence: 99%

“…This study evaluates the petrophysical attributes, with respect to pore structure and fluid movement, of the Springer shale for more effective exploration and production. While such studies have been performed for other major shale plays [11][12][13], the literature survey indicates minimal results for the Springer shale. Located at depths of 3353-4267 m, the Springer shale has a thickness of 18-36 m, total organic content (TOC) of 3-4%, and porosity of 3-9% [14].…”

Section: Introductionmentioning

confidence: 99%

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Pore Structure and Fluid Uptake of the Springer/Goddard Shale Formation in Southeastern Oklahoma, USA

Zhou

Huggins

et al. 2018

Geofluids

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Hosting an emerging play of the Springer/Goddard shale, the South Central Oklahoma Oil Province (SCOOP), is also the main production field for the underlying Woodford Formation. Understanding the reservoir quality of the Chesterian-age Goddard shale, currently little has been achieved, is vital to sustainable hydrocarbon production and exploration. Using polar (DI water and/or API brine) and nonpolar (n-decane) fluids to probe hydrophilic and hydrophobic pore networks, the purpose of this study is to examine wettability, pore connectivity, fluid imbibition, and tracer migration of the Springer shale. To achieve this, we collected core samples from two wells located at the heart of the play and performed mercury injection capillary pressure, wettability, fluid imbibition, and vapor absorption tests. Results from these studies show that the Springer shale has a stronger affinity to oil (n-decane in this study), compared to DI water and API brine. With porosity values averaging at 6.32 ± 0.75% and permeability of 20.0 ± 6.52 nD, the majority of pore-throat sizes for the Springer shale are 5–50 nm. The utility of wettability tracers of different molecular sizes helps tease out the intertwined relationship of pore-throat sizes, connectivity, and associated wettability of shale. The imbibition results suggest a molecular entanglement effect at the scale of 0.5 nm, even for the tracer penetration of a wetting fluid of n-decane. A petrophysical analysis of the Springer shale presented in this work is beneficial to further understand the pore structure and fluid movement within the shale to facilitate increased production and accurate economic evaluations.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%