Case Study of a Novel Acid-Diversion Technique in Carbonate Reservoirs

1999 ◽  
Author(s):  
F.F. Chang ◽  
T. Love ◽  
C.J. Affeld ◽  
J.B. Blevins ◽  
R.L. Thomas ◽  
...  
Keyword(s):  
Carbonate Reservoirs ◽  
Acid Diversion

A Case Study of Salt-Tolerant Functional Polymer For EOR in Carbonate Reservoirs with Ultra-High Salinity

2020 ◽  
Author(s):  
Aidar Zamilevich Mustafin ◽  
Kexing Li ◽  
Mikhail Alekseevich Varfolomeev ◽  
Chengdong Yuan ◽  
Rail Ilgizarovich Kadyrov ◽  
...  
Keyword(s):  
High Salinity ◽  
Carbonate Reservoirs ◽  
Salt Tolerant ◽  
Functional Polymer

scholarly journals Improved CRM Model for Inter-Well Connectivity Estimation and Production Optimization: Case Study for Karst Reservoirs

Energies ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 816 ◽  
Author(s):  
Daigang Wang ◽  
Yong Li ◽  
Jing Zhang ◽  
Chenji Wei ◽  
Yuwei Jiao ◽  
...  
Keyword(s):  
Time Delay ◽  
Net Present Value ◽  
Water Injection ◽  
Injection Rate ◽  
Production Optimization ◽  
Carbonate Reservoirs ◽  
Karst Reservoir ◽  
Control Step ◽  
Multi Phase Flow

Due to the coexistence of multiple types of reservoir bodies and widely distributed aquifer support in karst carbonate reservoirs, it remains a great challenge to understand the reservoir flow dynamics based on traditional capacitance–resistance (CRM) models and Darcy’s percolation theory. To solve this issue, an improved injector–producer-pair-based CRM model coupling the effect of active aquifer support was first developed and combined with the newly-developed Stochastic Simplex Approximate Gradient (StoSAG) optimization algorithm for accurate inter-well connectivity estimation in a waterflood operation. The improved CRM–StoSAG workflow was further applied for real-time production optimization to find the optimal water injection rate at each control step by maximizing the net present value of production. The case study conducted for a typical karst reservoir indicated that the proposed workflow can provide good insight into complex multi-phase flow behaviors in karst carbonate reservoirs. Low connectivity coefficient and time delay constant most likely refer to active aquifer support through a high-permeable flow channel. Moreover, the injector–producer pair may be interconnected by complex fissure zones when both the connectivity coefficient and time delay constant are relatively large.

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