Impact of Formation Damage on Sand Production in Deep Eocene Reservoirs, Lake Maracaibo, Venezuela: A Case History

1999 ◽  
Author(s):  
J.J. Tovar ◽  
L. Zerpa ◽  
E. Guerra
Keyword(s):  
Case History ◽  
Formation Damage ◽  
Sand Production ◽  
Lake Maracaibo

Successful Single-Stage Cementing in a Weak Formation: A Case History in Spain

2014 ◽  
Author(s):  
A.. Bottiglieri ◽  
A.. Brandl ◽  
R.S.. S. Martin ◽  
R.. Nieto Prieto
Keyword(s):  
Engineering Design ◽  
Case History ◽  
Laboratory Testing ◽  
Single Stage ◽  
Formation Damage ◽  
Cement Slurry ◽  
Integrity Test ◽  
Open Hole ◽  
Zonal Isolation ◽  
Horizontal Wellbore

Abstract Cementing in wellbores with low fracture gradients can be challenging due to the risk of formation breakdowns when exceeding maximum allowable equivalent circulation densities (ECDs). Consequences include severe losses and formation damage, and insufficient placement of the cement slurry that necessitates time-consuming and costly remedial cementing to ensure zonal isolation. In recent cementing operations in Spain, the formation integrity test (FIT) of the open hole section indicated that the formation would have been broken down and losses occurred based on calculated equivalent circulating densities (ECDs) if the cement slurry had been pumped in a single-stage to achieve the operator's top-of-cement goal. As a solution to this problem, cementing was performed in stages, using specialty tools. However, during these operations, the stage tool did not work properly, wasting rig time and resulting in unsuccessful cement placement. To overcome this issue, the operator decided to cement the section in a single stage, preceded by a novel aqueous spacer system that aids in strengthening weak formations and controlling circulation losses. Before the operation, laboratory testing was conducted to ensure the spacer system's performance in weak, porous formations and better understand its mechanism. This paper will outline the laboratory testing, modeling and engineering design that preceded this successful single stage cementing job in a horizontal wellbore, with a final ECD calculated to be 0.12 g/cm3 (1.00 lb/gal) higher than the FIT-estimated figure.

Systematic Evaluation of Asphaltene Formation Damage of Reservoir Fluids from Lake Maracaibo, Venezuela

2014 ◽  
Author(s):  
A. Memon ◽  
C. Borman ◽  
M. Garcia ◽  
D.J. Reyes Tristancho ◽  
J. Ratulowski ◽  
...  
Keyword(s):  
Systematic Evaluation ◽  
Formation Damage ◽  
Lake Maracaibo

Well Productivity Evaluation and Implications for the Significance of Formation Damage: Oseberg Main Case History

2020 ◽  
Author(s):  
Niall Fleming ◽  
Erlend Moldrheim ◽  
Espen Teigland ◽  
Anne-Mette Mathisen
Keyword(s):  
Case History ◽  
Formation Damage ◽  
Well Productivity

Systematic evaluation of asphaltene formation damage of black oil reservoir fluid from Lake Maracaibo, Venezuela

Fuel ◽  
2017 ◽  
Vol 206 ◽  
pp. 258-275 ◽  
Author(s):  
Afzal Memon ◽  
Craig Borman ◽  
Omid Mohammadzadeh ◽  
Martha Garcia ◽  
Dayana Judith Reyes Tristancho ◽  
...  
Keyword(s):  
Systematic Evaluation ◽  
Formation Damage ◽  
Oil Reservoir ◽  
Reservoir Fluid ◽  
Lake Maracaibo ◽  
Black Oil
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