Hydrocarbon evaporative loss from shale core samples as revealed by Rock-Eval and thermal desorption-gas chromatography analysis: Its geochemical and geological implications

Jiang, Chunqing; Chen, Zhuoheng; Mort, Andy; Milovic, Marina; Robinson, Rachel; Stewart, Ross; Lavoie, Denis

doi:10.1016/j.marpetgeo.2015.11.021

Cited by 83 publications

(27 citation statements)

References 25 publications

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“…Inappropriate storage before analysis can result in up to a 38% decline in gaseous and light hydrocarbons (up to C10) over a period of less than a day, based on Rock-Eval analyses [64]. The loss is strongly governed by the TOC content of the shale, with high TOC (>11%) significantly limiting the loss over time.…”

Section: Discussionmentioning

confidence: 99%

“…It is advisable to discard the outer 1-2 mm layer of sediment that has been in contact with the plastic or metal liner for potential contamination, especially for isotopic and elemental analyses. Extracting samples from the central portion of any drill core for geochemical analyses can minimise the superficial effects of core retrieval and contamination from handling e.g., [15,60,[62][63][64]. Hammering should be avoided as it can damage the core.…”

Section: Samplingmentioning

confidence: 99%

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Best Practices for Shale Core Handling: Transportation, Sampling and Storage for Conduction of Analyses

Basu

Jones

Mahzari

2020

JMSE

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Drill core shale samples are critical for palaeoenvironmental studies and potential hydrocarbon reservoirs. They need to be preserved carefully to maximise their retention of reservoir condition properties. However, they are susceptible to alteration due to cooling and depressurisation during retrieval to the surface, resulting in volume expansion and formation of desiccation and micro fractures. This leads to inconsistent measurements of different critical attributes, such as porosity and permeability. Best practices for core handling start during retrieval while extracting from the barrel, followed by correct procedures for transportation and storage. Appropriate preservation measures should be adopted depending on the objectives of the scientific investigation and core coherency, with respect to consolidation and weathering. It is particularly desirable to maintain a constant temperature of 1 to 4 °C and a consistent relative humidity of >75% to minimise any micro fracturing and internal moisture movement in the core. While core re-sampling, it should be ensured that there is no further core compaction, especially while using a hand corer.

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Section: Discussionmentioning

confidence: 99%

Section: Samplingmentioning

confidence: 99%

Best Practices for Shale Core Handling: Transportation, Sampling and Storage for Conduction of Analyses

Basu

Jones

Mahzari

2020

JMSE

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“…However, these two approaches for measuring actual residual hydrocarbon amount are not perfect. During the sampling and sample preparation, gaseous residual hydrocarbons are inevitably easily lost on the surface (Jiang et al 2016). Therefore, gaseous hydrocarbons amount in rock is mostly not included in the parameters 'A' or 'S 1 '.…”

Section: Model For Calculating Actual Residual Hydrocarbon Amountmentioning

confidence: 99%

Method for identifying effective carbonate source rocks: a case study from Middle–Upper Ordovician in Tarim Basin, China

Chen

Pang

et al. 2020

Pet. Sci.

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Hydrocarbon expulsion occurs only when pore fluid pressure due to hydrocarbon generation in source rock exceeds the force against migration in the adjacent carrier beds. Taking the Middle–Upper Ordovician carbonate source rock of Tarim Basin in China as an example, this paper proposes a method that identifies effective carbonate source rock based on the principles of mass balance. Data from the Well YW2 indicate that the Middle Ordovician Yijianfang Formation contains effective carbonate source rocks with low present-day TOC. Geological and geochemical analysis suggests that the hydrocarbons in the carbonate interval are likely self-generated and retained. Regular steranes from GC–MS analysis of oil extracts in this interval display similar features to those of the crude oil samples in Tabei area, indicating that the crude oil probably was migrated from the effective source rocks. By applying to other wells in the basin, the identified effective carbonate source rocks and non-source rock carbonates can be effectively identified and consistent with the actual exploration results, validating the method. Considering the contribution from the identified effective source rocks with low present-day TOC (TOCpd) is considered, the long-standing puzzle between the proved 3P oil reserves and estimated resources in the basin can be reasonably explained.

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“…The evaluation method of shale oil resource potential mainly adopts volumetric methods and includes the volumetric method based on porosity (Chen and Jiang, 2016;Modica and Lapierre, 2012) and based on pyrolytic S1 yield (Jiang et al, 2016a(Jiang et al, , 2016bLi et al, 2019;Michael et al, 2013). Modica and Lapierre (2012) proposed the PhiK approach for calculating the organic matter porosity of shale.…”

Section: Introductionmentioning

confidence: 99%

“…The core problem of this method is how to effectively correct S1 yield, which includes the calculation of evaporative loss of S1, the absorbed oil, and their impact on the total oil yield (TOY) estimation as well as shale oil mobility evaluation. Many authors (Abrams et al, 2017;Burnham et al, 2018;Chen et al, 2018;Jarvie, 2012Jarvie, , 2018Jiang et al, 2016aJiang et al, , 2016bLi et al, 2019;Michael et al, 2013;Romero-Sarmiento, 2019) have discussed these questions.…”

Section: Introductionmentioning

confidence: 99%

Evaluation method for resource potential of shale oil in the Triassic Yanchang Formation of the Ordos Basin, China

Guo

Chen

Liuzhuang

et al. 2020

Energy Exploration & Exploitation

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The widely distributed, thick Chang 7 Shale is the richest shale oil formation in China. A calculation method for the evaporative hydrocarbon recovery coefficient based on formation volume factor is proposed considering the correction of heterogeneity-based total organic carbon differences to improve the adsorbed oil calculation method, and light hydrocarbon evaporative sampling losses, which can make mobile and total oil calculations more accurate. The adsorbed oil, S1 evaporative loss, total oil yield, and movable oil yield of 200 shale samples from the Chang 7 Member were calculated using the new methods. Results show that S1 evaporative loss accounts for 29% of S1, total oil yield is 3.5 times S1, and movable oil yield accounts for 37% of total oil yield. Based on the calculated total oil yield and movable oil yield results, the relationships among total oil yield, movable oil yield, and total organic carbon of the Chang 7 were established yielding total oil yield and movable oil yield estimates of 11.12 × 109 t and 4.01 × 109 t, respectively, revealing its tremendous shale exploration potential.

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Hydrocarbon evaporative loss from shale core samples as revealed by Rock-Eval and thermal desorption-gas chromatography analysis: Its geochemical and geological implications

Cited by 83 publications

References 25 publications

Best Practices for Shale Core Handling: Transportation, Sampling and Storage for Conduction of Analyses

Best Practices for Shale Core Handling: Transportation, Sampling and Storage for Conduction of Analyses

Method for identifying effective carbonate source rocks: a case study from Middle–Upper Ordovician in Tarim Basin, China

Evaluation method for resource potential of shale oil in the Triassic Yanchang Formation of the Ordos Basin, China

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