Laboratory Testing and Well Productivity Assessment of Drill-in-Fluid Mud Systems in Order To Determine the Optimum Mud System for Alaskan Heavy-Oil-Multilateral Field Developments

2005 ◽  
Author(s):  
Eric R. Davis ◽  
David Hale Beardmore ◽  
Robert C. Burton ◽  
James Herbert Hedges ◽  
Richard M. Hodge ◽  
...  
Keyword(s):  
Heavy Oil ◽  
Laboratory Testing ◽  
Fluid Mud ◽  
Well Productivity ◽  
Productivity Assessment

Integrated Study for Well Productivity Enhancement in a Heavy Oil Reservoir in Northern Kuwait

2018 ◽  
Author(s):  
Arun Kharghoria ◽  
Khalid Ahmad ◽  
Abdullah Abdul Karim Al-Rabah ◽  
Kaustubh Guha ◽  
Devesh Kalia ◽  
...  
Keyword(s):  
Heavy Oil ◽  
Oil Reservoir ◽  
Well Productivity ◽  
Heavy Oil Reservoir ◽  
Integrated Study ◽  
Productivity Enhancement

Estimation of Horizontal-Well Productivity Loss Caused by Formation Damage on the Basis of Numerical Modeling and Laboratory-Testing Data

SPE Journal ◽  
2018 ◽  
Vol 24 (01) ◽  
pp. 44-59 ◽  
Author(s):  
Dmitry D. Vodorezov
Keyword(s):  
Analytical Solutions ◽  
Laboratory Testing ◽  
Horizontal Well ◽  
Damage Zone ◽  
Formation Damage ◽  
Well Productivity ◽  
Skin Factor ◽  
Damaged Zone ◽  
Variable Distribution ◽  
The Impact

Summary This paper presents a new numerical model of inflow to a well with a zone of damaged permeability. It is built on the principle of dividing the wellbore and damaged permeability zone into numerous segments. Simultaneous work of the segments is modeled with the method of velocity-potential theory. The model is applicable for wellbores of different trajectories including horizontal and multilateral wells. The model is focused on the extended application of results obtained during laboratory core testing that include a return-permeability (RP) profile of the core and cleanup parameters. The developed solution includes the effects of anisotropy, reservoir-boundary conditions, and a nonuniform distribution of formation damage in both radial and axial directions. The paper presents the new approach to include depth-variable distribution of damage in skin-factor models. The approach provides for the evaluation of pressure drop in a depth-variable damage zone by the resulting permeability that is defined by flow regime. Laboratory-obtained overall core permeability is associated with a linear flow, and when applied to a zone near the wellbore with radial or elliptic flow, it causes an error because of the depth-variable distribution of damage. The provided numerical simulations show that the impact of this factor on horizontal-well productivity is significant. The developed model is compared with existing analytical solutions of Furui et al. (2002) (FZH) and Frick and Economides (1993) (FE) for the case of a horizontal well with a cone-shaped damaged zone. The results show that a skin-factor transformation originally proposed by Renard and Dupuy (1991) for a case of a uniformly damaged well can be used successfully for the referred-to analytical solutions, which makes them applicable for wells with an elliptic drainage area. In this paper, we also suggest an approach whereby we relate the characteristics of the cleanup of the region near the wellbore to laboratory-testing conditions.

Sign in / Sign up

Export Citation Format

Share Document