Reservoir Pressure Evaluation using Multi-rate SNL презентация

Agenda
Introduction
Theory and Lab Tests
Calculation procedure
Case Study

PR(A)
PR – Reservoir Pressure
Crossflow
Unit A
Unit B
PR(B)
Introduction

Simulated Multi - Layered Injector
0 %
100 %
Unit A
Unit B
45 %
55 %
25 %
75 %

Noise power, mV2
McKinley (1994):
N - Noise Power
Q - Volumetric rate
- Pressure drop
Theory

Lab tests

Darsy law for a single-phase fluid:
Noise Power:
Dual-rate SNL:
Calculation procedure. SNL Dual-rate

Calculation procedure. SNL Multi-rate
Numerical optimization

Case Study

Case 1. Smart completion (SS – Inj, LS – Shut-in)
100%
75%
50%
9-5/8”
3-1/2”

Case 1. Noise power
100%
75%
50%
SI

Calculation procedure
PR=2137 psi
PR=1992 psi
SNL Multi-rate:
SNL Dual-rate:

9-5/8”
Pc = 2110 psi
PSI = 2205 psi
PInitial = 3416 psi
Case 1. Shut-in

Case 2. Oil Producer
Divergence

Case 2. Oil Producer

Calculation procedure
Depth X475 ft:
Npow= -0.001*(PR-Pwf) 2+0.072*(PR-Pwf)
PR = 3598 psi
Depth X532 ft:
Npow= -0.001*(PR-Pwf) 2+0.073*(PR-Pwf)
PR = 3617 psi
Depth X812 ft:
Npow= -0.0007*(PR-Pwf) 2+0.004*(PR-Pwf)
PR = 3761 psi
Depth X948 ft:
Npow= -0.002*(PR-Pwf) 2+-0.0016*(PR-Pwf)
PR = 3660 psi

SNL Multi-rate & RFT
RFT Data
SNL
3,611 psi
3,648 psi
3,598 psi
3,617 psi

Conclusion
Multi-rate SNL is more accurate than Dual-rate SNL;
Shut-in survey is not mandatory;
Multi-rate SNL is applicable for multi-phase fluid;