Development of an Improved Methodology to Assess Potential Unconventional Gas Resources

Salazar, Jesus; McVay, Duane A.; Lee, W. John

doi:10.1007/s11053-010-9126-9

Cited by 8 publications

(2 citation statements)

References 5 publications

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“…It considers an area with a high exploration degree as the analog area, mainly based on the estimated ultimate recoverable reserves (EUR) of production wells. It includes the FORSPAN model and its improved method from the U.S. Geological Survey (Schmoker, 2002;Salazar et al, 2010). In 2010, in Calgary, Canada, the Third International Symposium on oil and gas resource evaluation methods was held.…”

Section: Evaluation Of Total Shale Oil Resourcementioning

confidence: 99%

Evaluation Method of Movable Shale Oil Resource: A Case Study of the Shahejie Formation in the Dongying Sag, Jiyang Depression

Wang

et al. 2021

Front. Earth Sci.

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Although China has enormous shale oil resource potential, oil recovery is limited at present, largely because its movable resource is not evaluated. In this study, an evaluation method for movable shale oil resources is proposed. The process first evaluates the total shale oil resource (Qtotal), and then two-dimensional nuclear magnetic resonance (NMR) technology is used to measure the free oil ratio (Rfree) and further define the quantitative relationship (F) between the movable ratio (Rm) in the free oil and centrifugal force. The movable oil resource is calculated by the total shale oil resource, free oil ratio, and movable oil ratio (Qm = Qtotal × Rfree × Rm). This method was applied to the Shahejie Formation of the Dongying Sag, Jiyang Depression, in Bohai Bay Basin, and the relationship between the free oil ratio (Rfree) and depth was established based on several core 2D NMR data. Based on the formation pressure, flowing bottom hole pressure, and relationship (F), the movable shale oil ratio (Rm) in the target area was determined. The results showed that the movable shale oil ratio (Rm) of the lower Es3 is approximately 18.9–20% in the depth range of 3,200–3,700 m, and the movable shale oil resource is approximately 2.52 × 108 t.

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Section: Evaluation Of Total Shale Oil Resourcementioning

confidence: 99%

Evaluation Method of Movable Shale Oil Resource: A Case Study of the Shahejie Formation in the Dongying Sag, Jiyang Depression

Wang

et al. 2021

Front. Earth Sci.

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“…Gary et al pointed out that much of the uncertainty inherent in shale gas reservoirs could not be appropriately quantified through deterministic analysis and hence decision making for shale gas development based on results with a deterministic method would be biased. A probabilistic method usually uses Monte Carlo simulations to simulate uncertainties which are integrated with either a volumetric method [16], rate-transient analysis [17][18][19], or numerical simulation [20,21]. The volumetric method is limited because of the poor estimation in fraction of gas-in-place that can be recovered, although the recent advancement in core and petrophysical analyses may improve this method for resource assessment [22].…”

Section: Introductionmentioning

confidence: 99%

Probabilistic assessment of shale gas production and water demand at Xiuwu Basin in China

Zou

Yang

et al. 2016

Applied Energy

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This study presents an integrated probabilistic framework by combining Monte Carlo Simulation with a gas transport model of a horizontal well with multi-fracturing stages to assess shale gas resources in the Wangyinpu Formation of the Xiuwu Basin, China. Modeling results suggest that the 30-year cumulative production of a single horizontal well is predicted at a likely value of 3.50×10 8 m 3 with a maximum of 6.78×10 9 m 3. Potential shale gas production from a "sweet spot" area is estimated at a range of 1.13×10 10 m 3 to 1.76×10 13 m 3 with a likely value of 8.24×10 11 m 3. Sensitivity analysis indicates that the gas production rate and cumulative gas production of a single horizontal well are most sensitive to the relative volume occupied by kerogen in the bulk volume of the shale, gas desorption rate, number of fracturing stages, and permeability of the stimulated zone. Assessment of water demand for horizontal well drilling and hydraulic fracturing suggests that shale gas development at the Xiuwu Basin will not likely cause regional water-supply stress because of abundant water resources in the region. The probabilistic approach presented in this study can provide valuable information for planning shale gas development and can also be applied to other shale gas reservoirs.

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Natural Resources Research Publications on Resourcing Future Generations, and Introduction of Papers in this Special Issue

Carranza

2018

Nat Resour Res

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Development of an Improved Methodology to Assess Potential Unconventional Gas Resources

Cited by 8 publications

References 5 publications

Evaluation Method of Movable Shale Oil Resource: A Case Study of the Shahejie Formation in the Dongying Sag, Jiyang Depression

Evaluation Method of Movable Shale Oil Resource: A Case Study of the Shahejie Formation in the Dongying Sag, Jiyang Depression

Probabilistic assessment of shale gas production and water demand at Xiuwu Basin in China

Natural Resources Research Publications on Resourcing Future Generations, and Introduction of Papers in this Special Issue

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