Petroleum Engineering Handbook: Volume I

The 18 chapters in the Petroleum Engineering Handbook (PEH) Volume I are as follows:

C1-3: Math
C4: Fluid Sampling
C5: Gas Properties
C6: Oil Correlations
C7: Thermo/Phase
C8: Phase Diagrams
C9: Asphaltene/Wax
C10: Produced Water
C11: Phase Behavior
C12: Emulsions
C13: Rock Properties
C14: Permeability
C15: Relative Permeability
C16: Economics
C17: International Law
C18: 21st Century Law

The first chapter in Volume I that is worth reviewing is C4: Fluid Sampling.
Below is an outline. If any of the material is unfamiliar (especially terminology) read those sections in detail until it makes sense. Otherwise, the outline should suffice.

I would especially note the section on "gas sampling for reservoir oil remix"; understand how to use the chart.

Note the list below seems pretty short and simple at first glance, but it's really not. It literally took hours to cull the wheat from the chaff to make this reference. Be aware: 90% of this chapter lacks utility for the average engineer but it's hard to sort it out at a glance.

_______________________________________________ 
Fluid Sampling: RP44

BS&W: Basic Sediment & Water

DST: Drill Stem Test; note samples often unconditioned (early flow)

GOR: Gas Oil Ratio; often largest sample error

P&T: Pressure & Temperature

RFT: Repeat Formation Tester; several depths gradient; note filtrate contamination.

SI: Shut In

WELL CONDITIONING: Flow until stable (WHP/mud filtrate/workover fluids/reaction products).

WHP: Well Head Pressure

Samples:

·           Preserve P&T state during handling/storage.

·           Multiple before excessive drawdown.

·           Asphaltenes: single-phase (monophasic) sampler keeps at reservoir psi.

·           Water: aquifers vary laterally & by depth; RP 45: pH, T, alkalinity, O2, CO2, H2S, iron, turbidity.

·           Waxes: use heated chamber samplers.

·           Separator sample method: 1) drop flow rate by steps, 2) take sample when GOR/flow stabilizes.

·           Separator gas sample volume for reservoir oil remix; need separator GOR & PSI: FIG 4.4 (I-190).

·           Wellhead/Flowline: single phase only (e.g. dry gas, very-low GOR, or high-P high-T condition).

·           Split-stream sample (isokinetic): two-phase; side stream equal velocity (e.g. gas condensate).

·           Choke may change GOR: due to 1) two-phase flow effect, 2) phase changes, 3) gas condensate.

·           Downhole capture method: 1) SI for pressure, 2) flow low to clean near wellbore, 3) SI, 4) sample.

·           Downhole capture tools: by timer, mechanical clock, or electrical signal.