first Flashcards
What is net sand thickness

Discribe the linearity of the closed reservoir of arbitrary geometry PSSF equation

what is the log log method for a gas well build up test

what is “L” when calcualting two point derivative

Describe sandface rate when production goes to 0 or increases fast

What is the equation for wellbore storage coeffcient

what is the gas flow equation and how does it compare to the oil flow equation

Any increase in flow capacity (kh) will cause the pressure derivative to deviate ____ from IARF profile

in a Gringarten-Bourdet Type Curve, well bore storage is has a _____ slove

What is the simulation / history matching process

A ____ boundary (no-flow or constant-pressure) can be appropriate ONLY if the well is MUCH closer to ONE BOUNDARY than to any other

What is a core analysis test in terms of alternate tests

What is the productivity index

When does IARF end and PSSF start for a Well In The Center Of A Closed Circular Reservoir

what is a linear constant pressure boundary

what is the manual log log analysis method for gas reservoir build up test

how does the use of adjusted pressure and adjusted time modify the diagnositic plot

What is the recommended procedure for drawdown semilog analysis with varying rates

What is the Horner Pseudoproducing Time Approximation

what is the procedure to do a gas well build up test semilog analysis

how do you determine the skin effect while using a Gringarten Type Curve

What is the equation for infinite acting radial flow

What is the Horner method

what is the symbol for real gas pseudopressure

Name an anomaly during Final Flowing Wellbore Pressure


What is the Equivalent-Time Method procedure for build up test analysis

What is the viscosity versus pressure graph for gas

when do you use p versus p2 during gas drawdown test
in between 2000 and 3000, there is no approximation, you need to calculate

What is the equation for steady state radial flow

What is PSS

The top equation is for ________
and the bottom equation is for _______

top = well bore storage
bottom = reservoir


in a Gringarten-Bourdet Type Curve, IARF has a _____ slope

what is the Ei function with dimensions
typed, arrow point

What is the wellbore flow equation for PSSF for a closed circular reservoir?





What is the recommended procedure for Reservoir Limits Test Analysis

Describe linear no-flow boundary


what is adjusted time

Radius of investigation is a function of what

what is TD

Dimensionless time
What is the Agarwal Equivalent-Time Method



Describe Circular Constant-Pressure Boundary

What is the formation volume factor versus pressure graph for gas

A Gringarten Type Curve has a ____ log-log plot

What is the viscosity versus pressure graph for water

The derivative for the IARF period all approach what?

1/2
Solution for ____Boundary condition can be solved using the method of image wells



What is the formation volume factor versus pressure graph for oil

What is total compressibility

What does PSSF begin

What is the MDH method

what is the symbol for adjusted pressure
pa

What is a drawdown test

Gas wells often exhibit rate dependent or ____ skin factor

What is an exploration well test

what is IARF
infinite acting radial flow
What is the principal of superposition in time

What is pore volume compressibility

________ are solutions to the diffusivity equation in dimensionless form displayed graphically.

what is the log log drawdown test procedure for a gas reservoir

What is the equation for fluid compressibility

ka > ko means the reservoir is what?

In a constant-rate drawdown test, the well is initially shut in, and the reservoir is at _______ pressure

The wellbore storage coefficient depends on what?

What are the assumptions for the Dietz & Ramey-Cobb Methods


What is a deliverability test

what are some observations of this data


What is the radius of investigation

what are the assumptions for a Gringarten-Bourdet Type Curve

In PDD, a unit-slope line in derivative suggests the presence of a _____reservoir, while in PBU, it happens only if the reservoir is not ____

What is a transient test



What is the Diffusivity equation for radial flow

ka < ko means the reservoir is what?

what are the types of well model for type curves

Any reduction in flow capacity will cause the pressure derivative to deviate ____ from IARF profile

Descripe pressure response for linear no flow boundary

what are the two steps to use Buildup Test Analysis using Drawdown Type Curves:

what are the types of inner boundary conditions for type curve models

What is a build up test

What is type curve matching in terms of interpretation methods

when matching up type curves during a drawdown test, ___ and ___ are calculated after matching up the x and y axis
k, CD –> C, and S

The Gringarten-Bourdet Type Curve is a type of _______ plot
diagnostic plot
During pseudosteady-state flow from a closed reservoir, Pa and ta , may be used to predict gas-well behavior, provided the adjusted time is evaluated using fluid properties at _____ pressure as a function of time

What is formation volume factor?

Average reservoir pressure can be calculated using conventional material balance, p/z vs Gp , if the reservoir ______ and _____ are known.

What is the inverse problem

what is the two point method to calcualte derivative

What is the forward problem

describe closed circular reservoir

what is the semi-log drawdown test procedure for a gas reservoir



• If the pressure changes during drawdown in less than 10% of the initial pressure, the ____ equation may be used with acceptable results.

What is the MBH Procedure for estimating Average Drainage-Area Pressure

How do you factor in varying rate during a drawdown test

What is the equation for steady state linear flow

what is psuedotime

The a larger difference between the Gringarten and Bourdet Type Curve indicates what?
more skin

What is a single well test

What is the wellbore pressure equation

what two things need replaced when using oil equations during gas drawdown tests



What is wireline formation testing in terms of alternate tests



How can we estimate three independent quantities (k, s, pi ) from a straight line on the Horner plot?

What is a log-derived permeability estimate in terms of alternate tests

What are some additional pressure drop equations due to permeability alteration

show the Gringarten-Bourdet type curve for damaged, undamaged, and stimulated wells

What is the formation volume factor versus pressure graph for water

What is the Ei function without dimensions
hand written

What is the straight line method in terms of interpretation methods

What is a rate transient test in terms of alternate tests

In practice, what is the best workflow for well test interpretation

During gas build-up tests, don’t forget to replace pressure and time with the _____pressure and adjusted time, respectively, and the oil properties with gas properties evaluated at _______

what are the types of outer boundary conditions for type curve models

The best fit of a type curve can be used to calculate ____, ____, ______, _____, or other reservoir properties

For Gringarten Type Curve, CDe2s reflects effects of ____ and ____
wellbore storage and skin

What is well test interpretation

what is the bourdet three point method

What is the principal of superposition in terms of a buildup test

what is a Gringarten-Bourdet type curve

______ means the pressure gradients in the reservoir are small enough – reservoir pressure may be treated as uniform throughout the reservoir

how do you do a manual log log analysis

What is the completion efficiency ratio

What is the effect of flow rate on the radius of investigation



what is the manual log log analysis for a gas reservoir



The pseudopressure and the adjusted pressure depend only on:



When does IARF end?

What is the Diffusivity equation for 1D linear flow



What is a development well test

What is the Dietz method procedure

What is the Horner method

what are the types of reservoir media for type curve models

What does the MBH pressure function graph look like for a 2x1 square

what is the adjusted pressure equation used during a gas well build up test semilog analysis

What is the equation for a closed reservoir of arbitrary geometry under PSSF?



What are the simplist boundary models

What is a multi well test

what is the equation for adjusted pressure

What is the principal of superposition in space

The Bourdet derivative is a _____ derivative
logarithmic



What is the MBH method?



• Many physical reservoir boundaries give similar ____ response and requires additional data to confirm the boundary type

What is the viscosity versus pressure graph for oil

Use Gringarten-Bourdet type curve for build up test if:



Describe pressure response for linear constant pressure boundary

what is the least square curve fitting method



What is a permanent monitoring test in terms of alternate tests



What is the pressure profile equation for a drawdown test

what are the 3 types of reservoir boundaries

What is Darcy’s law

what is CD

dimensionless wellbore storage
How do you linearize a drawdown test graph and what equatiosn results
