Chaudhri - Oil Well Testing Handbook

693

Index terms			Links
R
Reservoir oil flow analysis	13
Steady state flow equation	13
Radial flow	14
Pseudo steady state flow	17
Flow equations	18
Unsteady state (transient) flow	21
Radial diffusivity equation	21
Various dimensionless flow geometry	24	25
Linear flow	24
Radial cylindrical flow	25
Radial spherical flow	25
Numerical models	26
Reservoir model development process	26
Reservoir model construction process	27
Model solution process	28
One-dimensional horizontal model	29
One-dimensional dipping model	29
Two-dimensional horizontal model	30
Three-dimensional layered model	30
Two-dimensional coning model	31
Two-dimensional vertical model	31
Three-dimensional continuous model	32
Three-dimensional continuous (section)
model	32
Calculating pressure distribution in
directional well	33
Long time approximation	34
Reservoir geometry	117
Radial flow	25	86
Rectangular drainage area	62	63	65

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694
Index terms		Links
Rate dependent skin factor (see Turbulent
factor)
Reservoir rock properties	623
Formation compressibility	623
Reservoir water PVT properties (see Water
PVT properties)
Radial cylindrical flow	25
Radial spherical flow	25
Reservoir system characterization flow chart	6
Reservoir consisting of commingled zones and
crossflow layers	509
Radius of investigation	213	399
Reservoir layer conductivity	509
Reservoir Pressure	221	231 234
References:
Fluid flow equations to oil systems	13
Well testing techniques in horizontal oil
wells	44
Drawdown test analysis methods	107
Buildup test analysis methods	153
Type curve matching techniques	287
Massive hydraulic fractured oil well	372
behavior analysis	372
Well behavior analysis by bilinear flow
theory	339
Multilayered reservoir systems	504
Pressure behavior analysis in heterogeneous
systems	523
Field case studies	348
Reservoir system characterization flow chart
process using integrated approach	6

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					695
Index terms			Links
Reservoir modeling	26
Russell after analysis plot	203
Reservoir size	173	174
Pressure drop due to damage	179
Radial permeability	332	366
Radius of investigation	117	116	409
S
Selection of oil wells for optimum treatment	5
Slider method	190
Skin effect: See Skin factor
Skin factor	52	53	54	63	71
	97	99	100	101	107
	110	113	114	118	122
	124	126	128	129	132
	133	134	137	139	142
	143	144	148	149	154
	155	160	166	167	169
	172	179	184	186	187
	191	193	195	198	201
	294	205	207	209	211
	219	220	227	228	230
	263	265	296	300	318
	322	324	327	348	362
	365	368	397	401	403
	410	413	469	475	481
	483	498	492	496	499
Estimating from DST in horizontal wells	397
Estimating from drawdown testing in
horizontal wells	112
Estimating from buildup testing in
horizontal wells	96

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696
Index terms			Links
Skin factor (Continued)
Estimating from drawdown testing	112	122	125	131	138
	141	143	144	148
Estimating from buildup testing	154	159	165	179	183
	186	188	190	191	195
	198	200	204	207	209
	228	230
Estimating by type curve matching	296	300	302	318	322
	324	327
Shaped factor-dependent skin factor	68
Schematic pressure time history for constant
rate drawdown test	108
Schematic late transient drawdown plot	112
Semilog late transient analysis plot	114
Shapes of buildup curves	174	175
Selection of oil wells for optimum treatment	2	8
Semilog plots
Pressure drawdown test analysis	114	131	150
Pressure buildup test analysis	155	165	179	182	184
	187	188	193	223
Average reservoir pressure	244	250
Naturally fracture reservoir	258	262	269	273
Type curve analysis	295	321
Bilinear flow analysis	355
Hydraulic fractured oil well	383
Drill stem testing	408	413	415	426
Injection well testing	467	468	474	481	487
	491	495
Shaped factor dependent skin factors	68
Schematic of a horizontal well located in a
rectangular drainage area	69

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					697
Index terms			Links
Shaped related skin factors	74
Schematic late transient drawdown analysis
plot	112
Semilog late transient analysis plot	114
Superposition based on logarithm of the
approximation	150
Semilog single rate buildup data pit	165
Schematic representation of rate variation
preceding a pressure buildup test	207
Semilog type curves for early and late time
data analysis	400
Selecting proper straight-line limits	213
Upper time limit	213
Lower time limit	213
Shape factor	367
T
Type curve matching	287
Ramey’s type curve	287
Earlougher and Kersch type curve	289
McKinley type curves	302
Fracture type curves	313
Type curve for vertical fracture well	317
Type curve for horizontal fracture well	329
Pressure drawdown test data for Type curve
matching	284	297	305	309	319
	325	332
Pressure drawdown test data matching
curves	295	298	301	306	307
	310	311	323	326	333
Pressure derivative type curves	359

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698
Index terms			Links
Type curve matching (Continued)
Pressure derivative application	360
Pressure buildup testing	361
Pressure drawdown testing	362
Fractured reservoir system	365
Pseudo state interporosity flow	365
Transient interporosity flow	368
Pressure derivative trends	370
Typical pressure drawdown behavior curve
shapes for fissured reservoir	257
Two rate drawdown test plot	127
Technique to estimate average pressure
Using modified Muskat method	241	244	250
Using Arps and Smith method	245
Typical pressure drawdown behavior curves,
shapes curves
Using Warren and Root model	257
Using Kazemi model	257
Total system mobility	195	196	198
Total compressibility	195	198	212
True skin factor	179
U
Use of SI	577
Unit-slope straight line	110	289
Unit	11	577
Units systems	577
Unsteady-state (transient) flow	21
Uses of interference tests in fissured and
matrix formations	275

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			699
Index terms			Links
V
Variable-rate testing: See Multiple-rate testing	269	283
Vertical interference testing: See Interference	507
Vertical permeability	335	336
Vertical pulse testing	511
Vertically fractured wells	423
Estimating fracture length	323	324	327
Estimating permeability	323	324	326 328 332
	335	336
Finite-conductivity fracture	373
Horner plot	384
Infinite-conductivity fracture	372
Interference testing	429
Linear flow analysis	384
Conventional method of analysis	382
Pulse testing	511
Reservoir Limit testing	511
Type-curve matching	509
Uniform flux fracture	416
Estimating fracture skin factor	406	448
Viscosity:
Oil	618
Water	624
Values of dimensionless pressure as a function
of dimensionless time	36
Various methods to determine the distance to a
linear discontinuity	526
Various reservoir parameters and their uses	3
Various pressure analysis methods to
determine important reservoir parameters	7
View of a skin near wellbore	55

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700
Index terms			Links
View of fractured vertical well	65
Variable rate drawdown test plot	131
Variable rate-Odeh and Jones plot	136
Various analysis techniques, their applications,
and their limitations	147
Variable-rate pressure buildup analysis plot	209
Variable rate pressure buildup plot	212
Various analysis techniques, their applications,
and limitations	218
Various flow periods and their identification in
naturally fractured reservoirs	279
W
Water PVT properties-gas free conditions	624
Formation water compressibility	625	627	629	631	633
	635	637
Gas solubility	625	627	629	631	633
	635	637
Water formation volume factor	625	627	629	631	633
	635	637
Formation water density	625	627	629	631	633
	635	637
Density gradient	625	627	629	631	633
	635	637
Water viscosity	625	627	629	631	633
	635	637
Water PVT properties-gas saturated conditions	625
Formation water compressibility	626	628	630	632	634
	636	638
Gas solubility	626	628	630	632	634
	636	638

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					701
Index terms			Links
Water PVT properties-gas saturated conditions (Continued)
Water formation volume factor	626	628	630	632	634
	636	638
Formation water density	626	628	630	632	634
	636	638
Density gradient	626	628	630	632	634
	636	638
Wellbore damage Improvement (see
stimulation)
Wellbore storage	64	68	89	422
Unit-slope straight line	109
Wellbore storage coefficient	110	111	262	268	300
	302	349	362	365	401
	403	410
Wellbore storage constant, (see wellbore
storage coefficient)
Wellbore storage effect	291
Wellbore radius	315
Well geometry	297
Well test interpretation models for naturally
fractured reservoirs	254
Pseudo-steady state model	258
Transient state model	261
Pressure gradient models	261
Streltsova and DeSwaan techniques	261
Type curve matching techniques	262
Pressure derivative method	263
Wireline formation test data evaluation	414
Open hole formation test	415
Empirical interpretation charts	418	421
Closed hole formation test	429

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702
Index terms			Links
Wireline formation test data evaluation (Continued)
Reservoir rock’s porosity distribution
system analysis	422
Pollard plot	423
Matrix pore volume calculation	424
Fracture pore volume calculation	424
Partitioning coefficient estimation	424
Well skin effects	425
Formation test pressure difference plot	426
Porosity partitioning coefficient	427
Wellbore storage and skin type curves in a
double porosity reservoir	263
Water permeability	195	198
Wellbore storage constant	289	290	298 307
Wellbore storage coefficient	300	302	303
Well transmissibility	307	311	312
Wellbore volume	469
Water permeability	480

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