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Chaudhri - Oil Well Testing Handbook

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683

Index terms

 

 

Links

 

 

Linear data plots (Continued)

 

 

 

 

 

Injection well test data plots

465

497

501

 

 

Logical well test data acquisition and analysis

 

 

 

 

 

program

4

 

 

 

 

Late time radial flow (pseudo-radial flow)

87

 

 

 

 

Linear flow analysis-high conductivity

 

 

 

 

 

fractures

384

 

 

 

 

Late data parameter

312

 

 

 

 

Layer fracture conductivity

509

 

 

 

 

M

 

 

 

 

 

Mathews-Brons-Hazebrock

236

 

 

 

 

Miller-Dyes-Hutchison

237

 

 

 

 

Muskat method

240

 

 

 

 

Total mobility ratio

195

196

198

 

 

Multiple-rate testing

463

 

 

 

 

Analysis plot, slope, intercept

487

491

495

 

 

Estimating permeability

469

470

473

477

487

 

491

492

493

 

 

Estimating skin factor

481

487

488

491

492

 

496

499

502

 

 

Estimating pressure drop across skin

469

475

481

 

 

Radius of investigation

469

 

 

 

 

Distance to well bank

471

471

487

 

 

Radius of drainage

471

 

 

 

 

Flow efficiency

471

 

 

 

 

Injectivity index

481

 

 

 

 

Calculate compressibility in swept zone

482

 

 

 

 

Mobility ratio

488

 

 

 

 

Volume of oil bank

489

 

 

 

 

Volume of water bank

490

 

 

 

 

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684

 

Index terms

Links

Multiple-rate testing (Continued)

 

Fracture gradient

497

Multilayered reservoir systems

504

Classification of layered reservoir systems

551

Crossflow reservoirs

504

With crossflow

505

Without-crossflow reservoirs

506

Commingled reservoirs

507

Composite reservoir

507

Interlayered crossflow reservoirs

508

Two-layered reservoir without crossflow

512

Three layer without crossflow reservoirs

506

Four layer crossflow reservoir

505

Muskat plot characteristics

516

MDH method

516

Constant producing rate

511

Constant producing pressure

510

Determine degree of communication and

 

types of crossflow

513

Pressure buildup behavior curve in two-

 

layered gas reservoir

563

Factors affecting performance

520

Relative permeability

520

Pore size

520

Reservoir geometry

520

Permeability anisotropy

520

Reservoir n-layer system

521

Economic aspects

521

Most common gas well test interpretation

 

methods

5

Major flow regimes in horizontal oil wells

86

This page has been reformatted by Knovel to provide easier navigation.

685

Index terms

 

Links

Methods of evaluating MHF oil wells

372

 

Match of interference test data

433

 

Muskat straight-line intercepts for two-layer

 

 

reservoirs without cross flow

506

 

Muskat plot for-layer reservoir with a

 

 

permeability contract of 2

518

 

Mechanical skin factor

73

 

Multiphase pressure buildup plot

197

 

MDH drawdown pressure plot

237

 

Muskat graph for average pressure

250

 

Main characteristics of matrix block and

 

 

fracture system

256

 

Main characteristics and behavior of naturally

 

 

fractured reservoir

260

 

Mud gradient

392

 

Model selection process or optimum selection

28

 

Multi rate drawdown test plot

141

 

MBH graph

180

 

MDH graph

181

188

Muskat data plot

184

189

Multiphase pressure buildup data plot

197

 

Multiphase and multi-rate pressure buildup

 

 

data plot

217

 

MDH dimensionless pressure for circular and

 

 

square areas

237

 

Main characteristics of matrix blocks and

 

 

fracture systems

256

 

Most common interpretation methods for

 

 

naturally fractured reservoirs

259

 

This page has been reformatted by Knovel to provide easier navigation.

686

 

 

Index terms

 

Links

Main characteristics and behavior of naturally

 

 

fractured reservoirs

260

 

Methods of evaluating MHF oil wells

373

 

Matrix storage

274

 

Matrix permeability

272

 

Matrix block shape factor

369

 

Mud gradient

408

 

Matrix pore volume

424

 

Matrix porosity

424

 

Mobility ratio

488

 

N

 

 

Nomenclature

640

 

No-flow barrier

342

526

Numerical models and their applications

26

 

Solution of radial diffusivity equation

21

 

Various dimensional flow geometry

24

 

Linear flow

24

 

Radial cylindrical flow

25

 

Radial spherical flow

25

 

Reservoir model development process

26

 

Selection of numerical simulation models

 

 

and their applications

27

 

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

 

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687

Index terms

 

Links

Numerical models and their applications (Continued)

 

Three-dimensional continuous (section)

 

 

model

32

 

O

 

 

Original reservoir pressure

234

 

One-dimensional coordinate systems

24

 

Linear flow

24

 

Radial cylindrical flow

25

 

Radial spherical flow

25

 

Oil saturation

432

554

Oil well test data acquisition, analysis, and

 

 

management

2

 

Oil well test analysis programs

2

 

Oil wells for optimum stimulation treatment

2

 

Odeh’s equation for calculating skin factor due

 

 

to restricted entry

168

 

P

 

 

Pulse tests

429

 

Pressure buildup analysis methods

153

 

Single-rate

162

 

Two-rate test

173

 

Buildup following variable rate test

201

 

Production stimulation, (see stimulation)

 

 

Pseudo-steady state (finite) flow

17

 

Pseudo skin factor with a finite conductivity

 

 

vertical fracture

258

274 366

Pressure response in pulse test

434

 

Pulse test responses with flow and shut-in time

434

 

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688

 

 

 

 

 

Index terms

 

 

Links

 

 

Pressure derivative trends for common flow

 

 

 

 

 

regimes

370

371

 

 

 

Pressure derivative type curves

361

366

369

 

 

Calculating interporosity flow parameter

258

259

263

265

269

 

283

 

 

 

 

Calculating ratio of matrix permeability to

 

 

 

 

 

fracture permeability

264

258

267

271

273

Pulse test design procedure

453

 

 

 

 

Pressure buildup for crossflow oil reservoir

505

 

 

 

 

Pressure buildup curve for a layered reservoir

 

 

 

 

 

system

513

 

 

 

 

Pressure buildup behavior in a two-layer oil

 

 

 

 

 

reservoir

520

 

 

 

 

Porosity partition in heterogeneous porous

 

 

 

 

 

media

424

 

 

 

 

Partitioning coefficient estimation

427

 

 

 

 

Procedures and guidelines to describe

 

 

 

 

 

reservoir heterogeneity

537

 

 

 

 

Pseudoskin factor

97

98

99

282

 

Porosity-compressibility product:

 

 

 

 

 

Estimating by type curve matching

293

 

 

 

 

Estimating from interference testing

433

 

 

 

 

Estimating from pulse testing

436

 

 

 

 

Porosity-compressibility-thickness product:

 

 

 

 

 

Estimating from interference test,

 

 

 

 

 

Estimating from pulse test

445

457

458

459

460

 

461

 

 

 

 

Pressure drop due skin

123

122

124

128

132

 

134

137

143

146

161

 

186

193

216

398

401

 

409

469

 

 

 

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689

Index terms

 

 

Links

 

 

Pore volume

112

114

115

120

 

Pseudoproducing time

163

265

326

328

338

 

355

480

 

 

 

Permeability:

 

 

 

 

 

Estimating by type-curve matching of

 

 

 

 

 

vertical oil wells

290

296

300

 

 

Of fractured oil wells

314

317

319

323

 

Estimating from drawdown testing of two-

 

 

 

 

 

rate drawdown test

122

 

 

 

 

Estimating from drawdown testing after

 

 

 

 

 

short shut in

389

 

 

 

 

Estimating from interference testing

431

 

 

 

 

Estimating from multi-rate pressure buildup

 

 

 

 

 

testing

210

 

 

 

 

Estimating from pressure buildup testing

154

165

179

183

186

 

190

193

200

204

207

 

218

228

230

 

 

Estimating from pulse testing

442

446

461

 

 

Estimating in composite system

505

 

 

 

 

Estimating permeability and thickness

 

 

 

 

 

product

112

113

148

200

264

 

268

392

482

487

566

Partial differential equations:

 

 

 

 

 

One-dimensional model

24

 

 

 

 

Linear flow

24

 

 

 

 

Radial cylindrical flow

25

 

 

 

 

Radial spherical flow

25

 

 

 

 

Pressure buildup test and data

154

163

178

186

198

 

194

196

201

202

205

 

208

213

214

215

216

 

222

223

 

 

 

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690

 

 

 

 

 

Index terms

 

 

Links

 

 

Pressure buildup curves

155

156

164

165

174

 

176

179

180

181

182

 

184

187

188

189

193

 

197

203

206

209

212

 

217

223

227

229

230

 

231

 

 

 

 

Pressure drawdown test and data

118

127

131

135

140

 

144

145

 

 

 

Pressure drawdown curves

108

109

110

112

114

 

119

120

123

127

131

 

136

141

149

150

 

Pressure data analysis

347

 

 

 

 

Bilinear flow type of analysis

348

 

 

 

 

Pressure data partially match curve for the

 

 

 

 

 

transition period between bilinear and

 

 

 

 

 

linear flow

350

 

 

 

 

Pressure data exhibit a half slope line on a

 

 

 

 

 

log-log graph

351

 

 

 

 

Pressure data partially falling in the pseudo

 

 

 

 

 

radial flow period

352

 

 

 

 

Pseudo skin factor equation

168

 

 

 

 

Calculating skin factor due to restricted

 

 

 

 

 

entry

168

 

 

 

 

PVT properties

 

 

 

 

 

Oil PVT properties

607

 

 

 

 

Saturation pressure

608

 

 

 

 

Solution gas oil ratio

612

 

 

 

 

Oil formation volume factor

613

 

 

 

 

Total formation volume factor

616

 

 

 

 

Oil density

616

 

 

 

 

Oil viscosity

618

 

 

 

 

Oil compressibility

622

 

 

 

 

This page has been reformatted by Knovel to provide easier navigation.

 

 

 

 

 

691

Index terms

 

 

Links

 

 

PVT properties (Continued)

 

 

 

 

 

Water PVT properties

624

 

 

 

 

Gas free conditions

625

627

629

631

633

 

635

637

 

 

 

Gas saturated conditions

626

628

630

632

634

 

636

 

 

 

 

Pore volume

112

115

120

191

 

Purpose and objective of reservoir simulation

26

 

 

 

 

Pressure time histories for a const rate

 

 

 

 

 

drawdown test

108

 

 

 

 

Pressure buildup plot dominated by afterflow

199

 

 

 

 

Pressure buildup curve in naturally fractured

 

 

 

 

 

reservoir

258

 

 

 

 

Pressure derivative type curves

264

 

 

 

 

Pressure derivative applications in oil well

 

 

 

 

 

testing

 

 

 

 

 

Infinite-acting Homogeneous reservoir.

 

 

 

 

 

Systems

361

 

 

 

 

Fractured reservoir systems

365

 

 

 

 

Pseudo-state interporosity flow

365

 

 

 

 

Transient interporosity flow

368

 

 

 

 

Pressure derivative trends for other common

 

 

 

 

 

flow regimes

370

 

 

 

 

Pore volume

17

 

 

 

 

Productivity index

166

 

 

 

 

Pseudo-steady state time

20

21

177

239

 

Pressure drop due to skin

113

134

137

139

143

 

186

187

210

 

 

Calculating from drawdown testing

113

114

118

122

130

 

132

134

137

139

 

Calculating from buildup testing

186

187

210

 

 

This page has been reformatted by Knovel to provide easier navigation.

692

 

 

Index terms

 

Links

Pressure chart interpretation for various testing

 

 

conditions

391

 

Fluid loss before packer

392

 

Leak in drill pipe

392

 

Leak in drill pipe

392

 

Packer failed and could not be set

393

 

Runaway clock. Clock spring released

393

 

Tool failed to close, no buildup is obtained

393

 

Effect of large seperpressure. Pressure

 

 

buildup during flow and buildup

 

 

period

393

 

Low permeability formation

393

 

Gauge plugged after packer was set but

 

 

before tool was opened

394

 

Two-layer effects. Caused by two producing

 

 

zones

394

 

DST is usually too short to notice

 

 

interference with today’s well pacing

394

 

Two tests with the same gauge

394

 

Gauge gradually plugged during flow period

394

 

Gauge plugged during flow and unplugged

 

 

late in buildup

395

 

Single test with two gauges

395

 

Pressure drop through

595

 

Hagedorn and Brown method

596

 

Beggs and Brill method

602

 

Computer flow diagram for the Beggs and

 

 

Brill method

503

 

Porosity estimation

410

433

Using DST Testing

410

 

Using Interference testing

433

 

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