The Potter Sandstone, Midway-Sunset Field, Kern County, California

Gardiner, Ronald; Wylie, Albert S.; Gagner, Mike

doi:10.32375/2001-gb75.9

Geology of the Midway-Sunset Oil Field and Adjacent Temblor Range San Joaquin Basin, California 2001

DOI: 10.32375/2001-gb75.9

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The Potter Sandstone, Midway-Sunset Field, Kern County, California

Ronald Gardiner¹,

Albert S. Wylie²,

Mike Gagner³

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2017

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Midway-Sunset 35Z Case Study: A Journey from Geo-Cellular Grids to Field Operations

Ardali¹,

D'Cruz²,

Erickson³

et al. 2017

SPE Western Regional Meeting

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The Olig heavy oil zone at 35Z is a shallow dipping reservoir with estimated oil in place of more than 20 MMBO and upside potential of 50-70% oil recovery with an optimal depletion strategy. The successful thermal development at Midway-Sunset section 35Z was facilitated by early collaborative reservoir characterization and modeling efforts. In this study, integrated subsurface mapping, petrophysical analysis and modeling technology were utilized to estimate the potential of the Olig sands and evaluate various field development options. The multidisciplinary effort between petrophysicists, geoscientists and engineers analyzed and integrated various sources of data into a full-field geological model. The model was calibrated and used to investigate various field development strategies. This work allowed the team to identify a development scenario that maximized both oil recovery and capital efficiency. The study led to technical recommendations that were implemented in 35Z Midway-Sunset field operations. The main deliverables of the study were as follows: Well spacing for any short-term and long-term thermal development was switched to 2-Acre spacing from original 1-Acre spacing. Therefore, the proposed number of wells drilled were reduced by almost half, resulting in significant capital cost savings.Modeling work quantified various long-term field development options. While Cyclic Steam Injection (CSI) provides significant oil recovery, continuous steam injection offers significantly higher oil recovery. Crestal steamflooding is superior compared to pattern steamflooding if geological continuity is confirmed. The early characterization and modeling work on the 35Z Olig informed the team's decision-making and helped grow the area from a 6-well pilot to an economic full-field thermal development in less than 2 years.

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Midway-Sunset 35Z Case Study: A Journey from Geo-Cellular Grids to Field Operations

Ardali¹,

D'Cruz²,

Erickson³

et al. 2017

SPE Western Regional Meeting

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show abstract

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The Potter Sandstone, Midway-Sunset Field, Kern County, California

Cited by 1 publication

References 0 publications

Midway-Sunset 35Z Case Study: A Journey from Geo-Cellular Grids to Field Operations

Midway-Sunset 35Z Case Study: A Journey from Geo-Cellular Grids to Field Operations

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