TROLLing Laura A. Janda, Tore Nesset, Gillian Ramchand UiT The Arctic University of Norway.
Kathy Nesset
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Transcript of Kathy Nesset
Presented by: Kathleen Neset
Wellsite Geology and Mudlogging
North Dakota Stratigraphic Column
Bakken Formation~360 Million Years OldPaleozoic EraMississippian/Devonian Period~110’ thick
Three Forks/Sanish~370 Million Years OldPaleozoic EraDevonian Period~240’ thick
Bakken
Three Forks
StratigraphyStratigraphy
Three Forks FormationThree Forks Formation
Bakken FormationBakken Formation
Lodgepole FormationLodgepole Formation
lower
middle
upper
Pelmatozoan limestone
“False Bakken”
Devon
ian
Mis
sis
sip
pia
n
“Sanish”
GR Res
Lithofacies 7 - SiltstoneLithofacies 7 - Siltstone
Lithofacies 4 – Interbedded Dark Grey Lithofacies 4 – Interbedded Dark Grey Shale and Buff Silty SandstoneShale and Buff Silty Sandstone
Lithofacies 3 - SandstoneLithofacies 3 - Sandstone
Lithofacies 2 – Interbedded Dark Grey ShaleLithofacies 2 – Interbedded Dark Grey Shale and Buff Silty Sandstoneand Buff Silty Sandstone
Lithofacies 1 - SiltstoneLithofacies 1 - Siltstone
(From LeFever and others, 1991)Lower Shale
Upper Shale
Lithofacies of the Middle Lithofacies of the Middle MemberMember
DrillpipeNon-magnetic Drill Collar
Bent Sub
Mud MotorRotating Sub
HS (0)
90R90L
45R45L
135R135L
180 (LS)
Upper SS
Gamma 60-80 API
ROP 30-60 ft/hr
Lithology Sandstone
MiddleStringer
Gamma 90-100+ API
ROP 50 ft/hr
Lithology Shale
Target
Gamma 30-50 API
ROP 70 ft/hr
Lithology Sandstone
Base Target
Gamma 60-90 API
ROP 25-40 ft/hr
Lithology Sandstone/Siltstone
Three Forks
Gamma 100+ API
ROP 20-30 ft/hr
Lithology Shale
ND Research – study in currently drilling wells to determine fracture stimulation growth – continued research frac methods.
Very early in learning Bakken/Sanish.
Bottineau County – Spearfish & Three Forks.
Request update study by USGS.
Widespread Bakken deposits
Phase I – initial drilling – define limits of pay
Phase II – development drilling – hold leases
Phase III – infill drilling – multipad drilling
Phase IV – secondary & tertiary recovery
Phase I
Phase III