Pacific Section AAPG Convention

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Development Of Kern County's Rose Oil Field

Abstract

We provide a data-rich update for Kern County's Rose oil field after reviewing the play, reservoir properties and a tiltmeter evaluation of frac propagation, as were documented in a cluster of publications ca. 2003. Our recent synthesis and themed evaluation is drawn from publically-accessible online DOGGR data through early 2015. It includes both production information and well histories that include directional surveys, completion information and geologic markers. A “heat map” is presented showing incremental and cumulative production posted over completion intervals and not wellheads. We also present 3-D visualizations showing completion intervals. Decline curves are presented. A discussion of trends in completion and frac programs is presented. The Rose oil field is an unconventional play discovered in 2000. It was indicated by seismic modeling and drill data extrapolated from the nearby North Shafter field. The play is a burial-induced permeability increase attributed to the diagenetic transformation of opal-CT to quartz diatomite within the McLure shale member of the Monterey Formation. The field is structurally simple; the McLure dips gently SW in an apparently unfaulted homocline. The play was confirmed in mid-2000 when EOG Resources recompleted, fraced and flow-tested the Tulare 25-1 in the McLure, previously untested in the area. Shortly after, EOG spudded the discovery well Goodshow 1H to confirm commercial production from the McLure and establish the pattern for developing the field. Rose production wells are vertical drills to approximately 7500 ft TVD, builds of ∼86 degrees or ∼94 degrees and laterals of ∼2500 to ∼5500 ft length toward the NNE or SSW. Rose field has a cumulative production >4 Mbbl BOE. Current production is from ∼52 wells with a GOR of ∼430 cf/stb and watercut of ∼70%. Completion of production wells is as follows: ∼20 wells in 2000-2003, ∼3 wells in 2004-2006, none in 2007-2010 and ∼22 in 2011-2014. Produced water is injected at depths of ∼2500 to 6000 ft into the Etchegoin and San Joaquin Formations. There are ∼15 open permits for new wells of all types within or associated with the field.