Abstract

This paper presents an analytical methodology for production forecasting of wells exhibiting boundary-dominated flow in unconventional volatile oil reservoirs. An analytical model using single-phase analogy is established to predict the production rate of a multi-fractured horizontal well under multiphase flow. Pseudo-variables are employed to linearize governing differential flow equations. Therefore, the analytical model for efficiently handling multiphase flow is essentially an advanced adaptation of existing single-phase models, in which we derive new multiphase fluid properties. To calculate the pseudo-variables accurately, we summarize accessible methods for the determination of saturation–pressure (S–P) relation and further provide an appropriate way to calculate multiphase pseudo-variables in unconventional volatile oil reservoirs based on simulation results. The simulation study indicates that the S–P relation given by constant volume depletion data for near-critical volatile oils leads to satisfactory results, and the S–P relation derived from the tank-type model is appropriate for ordinary volatile oils. The analytical solution and associated methods were validated through comparison with results from a compositional simulator; the excellent agreement during boundary-dominated flow demonstrated the accuracy of the analytical methodology. The analytical methodology can greatly reduce computation and is justified to make production forecasting in unconventional volatile oil reservoirs, this tractable methodology should be attractive to the industry.

References

1.
Perrine
,
R. L.
,
1956
, “
Analysis of Pressure-Buildup Curves
,”
Drill. Prod. Pract.
,
216
, pp.
482
509
.
2.
Martin
,
J. C.
,
1959
, “
Simplified Equations of Flow in Gas Drive Reservoirs and the Theoretical Foundation of Multiphase Pressure Buildup Analyses
,”
Trans. AIME
,
216
(
1
), pp.
321
323
.
3.
Raghavan
,
R.
,
1976
, “
Well Test Analysis: Wells Producing by Solution Gas Drive
,”
SPE J.
,
16
(
04
), pp.
196
208
.
4.
Raghavan
,
R.
,
1989
, “
Performance of Wells in Solution-Gas-Drive Reservoirs
,”
SPE Form. Eval.
,
4
(
04
), pp.
611
620
.
5.
Bøe
,
A.
,
Skjaeveland
,
S. M.
, and
Whltson
,
C. H.
,
1989
, “
Two-Phase Pressure Test Analysis
,”
SPE Form. Eval.
,
4
(
04
), pp.
604
610
.
6.
Saleh
,
A.
, and
Stewart
,
G.
,
1992
, “
Interpretation of Gas Condensate Well Tests With Field Examples
,”
SPE Annual Technical Conference and Exhibition
,
Washington, DC
,
Oct. 4–7
, Paper No. SPE-24719-MS.
7.
Fevang
,
Ø
, and
Whitson
,
C. H.
,
1996
, “
Modeling Gas-Condensate Well Deliverability
,”
SPE Res. Eng.
,
11
(
4
), pp.
221
230
.
8.
Sureshjani
,
M. H.
, and
Gerami
,
S.
,
2011
, “
A New Model for Modern Production-Decline Analysis of Gas/Condensate Reservoirs
,”
J. Can. Pet. Technol.
,
50
(
7
), pp.
14
23
.
9.
Sureshjani
,
M. H.
,
Behmanesh
,
H.
, and
Clarkson
,
C.
,
2014
, “
A New Semi-Analytical Method for Analyzing Production Data From Constant Flowing Pressure Wells in Gas Condensate Reservoirs During Boundary-Dominated Flow
,”
SPE Western North American and Rocky Mountain Joint Meeting
,
Denver, CO
,
Apr. 17–18
, Paper No. SPE-169515-MS.
10.
Behmanesh
,
H.
,
Hamdi
,
H.
, and
Clarkson
,
C. R.
,
2015
, “
Production Data Analysis of Tight Gas Condensate Reservoirs
,”
J. Nat. Gas Eng.
,
22
, pp.
22
34
.
11.
Zhang
,
M.
,
Becker
,
M. D.
, and
Ayala
,
L. F.
,
2016
, “
A Similarity Method Approach for Early-Transient Multiphase Flow Analysis of Liquid-Rich Unconventional Gas Reservoirs
,”
J. Nat. Gas Sci. Eng.
,
28
, pp.
572
586
.
12.
Makinde
,
I.
, and
Lee
,
W. J.
,
2016
, “
Forecasting Production of Shale Volatile Oil Reservoirs Using Simple Models
,”
SPE/IAEE Hydrocarbon Economics and Evaluation Symposium
,
Houston, TX
,
May 17–18
, Paper No. SPE-179964-MS.
13.
Tabatabaie
,
S. H.
, and
Pooladi-Darvish
,
M.
,
2017
, “
Multiphase Linear Flow in Tight Oil Reservoirs
,”
SPE Res. Eval. Eng.
,
20
(
1
), pp.
184
196
.
14.
Wu
,
Y.
,
Cheng
,
L.
,
Huang
,
S.
,
Bai
,
Y.
,
Jia
,
P.
,
Wang
,
S.
,
Xu
,
B.
, and
Chen
,
L.
,
2019
, “
An Approximate Semianalytical Method for Two-Phase Flow Analysis of Liquid-Rich Shale Gas and Tight Light-Oil Wells
,”
J. Pet. Sci. Eng.
,
176
, pp.
562
572
.
15.
He
,
Y.
,
Cheng
,
S.
,
Qin
,
J.
,
Wang
,
Y.
,
Chen
,
Z.
, and
Yu
,
H.
,
2018
, “
Pressure-Transient Behavior of Multisegment Horizontal Wells With Nonuniform Production: Theory and Case Study
,”
ASME J. Energy Resour. Technol.
,
140
(
9
), p.
093101
.
16.
He
,
Y.
,
Qiao
,
Y.
,
Qin
,
J.
,
Tang
,
Y.
,
Wang
,
Y.
, and
Chai
,
Z.
,
2022
, “
A Novel Method to Enhance Oil Recovery by Inter-Fracture Injection and Production Through the Same Multi-fractured Horizontal Well
,”
ASME J. Energy Resour. Technol.
,
144
(
4
), p.
043005
.
17.
Qin
,
J.
,
Cheng
,
S.
,
He
,
Y.
,
Wang
,
Y.
,
Feng
,
D.
,
Yang
,
Z.
,
Li
,
D.
, and
Yu
,
H.
,
2019
, “
Decline Curve Analysis of Fractured Horizontal Wells Through Segmented Fracture Model
,”
ASME J. Energy Resour. Technol.
,
141
(
1
), p.
012903
.
18.
Qin
,
J.
,
Xu
,
Y.
,
Tang
,
Y.
,
Liang
,
R.
,
Zhong
,
Q.
,
Yu
,
W.
, and
Sepehrnoori
,
K.
,
2022
, “
Impact of Complex Fracture Networks on Rate Transient Behavior of Wells in Unconventional Reservoirs Based on Embedded Discrete Fracture Model
,”
ASME J. Energy Resour. Technol.
,
144
(
8
), p.
083007
.
19.
Shi
,
W.
,
Liu
,
X.
,
Gao
,
M.
,
Tao
,
L.
,
Bai
,
J.
, and
Zhu
,
Q.
,
2023
, “
Pressuredrop Response Characteristics for Multi-Injection Well Interfered Vertical Well in Heterogeneous Fractured Anticline Reservoirs
,”
ASME J. Energy Resour. Technol.
,
145
(
9
), p.
092902
.
20.
Wattenbarger
,
R. A.
,
El-Banbi
,
A. H.
,
Villegas
,
M. E.
, and
Bryan Maggard
,
J.
, “
Production Analysis of Linear Flow Into Fractured Tight Gas Wells
,”
SPE Rocky Mountain Petroleum Technology Conference/Low-Permeability Reservoirs Symposium
,
Denver, CO
,
Apr. 5–8
, Paper No. SPE-39931-MS.
21.
Walsh
,
M. P.
, and
Towler
,
B. F.
,
1995
, “
Method Computes PVT Properties for Gas Condensate
,”
Oil Gas J.
,
93
(
31
), pp.
83
86
.
22.
Tarner
,
J.
,
1944
, “
How Different Size Gas Caps and Pressure Maintenance Programs Affect Amount of Recoverable Oil
,”
Oil Weekly
,
144
(
2
), pp.
32
34
.
23.
Walsh
,
M.
, and
Lake
,
L. W.
,
2003
,
A Generalized Approach to Primary Hydrocarbon Recovery
,
Elsevier Science
,
Amsterdam
, pp.
224
230
.
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