Modelling of Near-Wellbore Formation Damage for Open Hole Horizontal Wells in Anisotropic Media

2003 ◽  
Author(s):  
Y. Ding ◽  
G. Renard
Keyword(s):  
Anisotropic Media ◽  
Horizontal Wells ◽  
Formation Damage ◽  
Open Hole

Evaluation of Horizontal Well Performance After Drilling-Induced Formation Damage

2005 ◽  
Vol 127 (3) ◽  
pp. 257-263 ◽  
Author(s):  
Y. Ding ◽  
G. Renard
Keyword(s):  
Horizontal Well ◽  
Oil And Gas ◽  
Horizontal Wells ◽  
Integrated Approach ◽  
Formation Damage ◽  
Well Performance ◽  
Wellbore Modeling ◽  
Open Hole ◽  
Testing Techniques ◽  
Study Laboratory

It is well recognized that near-wellbore formation damage can dramatically reduce well productivities, especially for open hole completed horizontal wells. The economic impact of poor productivity of these wells has pushed toward significant efforts in recent years to study laboratory testing techniques and numerical modeling methods for predicting and controlling drilling-induced formation damage. This paper presents an integrated approach, combining a near-wellbore modeling with laboratory experiments for data acquisition as input for the model, to evaluate the performance of oil and gas wells after drilling-induced formation damage.

Effect of Non-Uniform Formation Damage on the Inflow Performance of Horizontal Wells.

1999 ◽  
Author(s):  
Habib Menouar ◽  
Abdulaziz Al-Majed ◽  
Syed Sajid Hasan
Keyword(s):  
Horizontal Wells ◽  
Formation Damage ◽  
Inflow Performance

Formation Damage in Horizontal Wells Caused by Polymer Mud

1996 ◽  
Author(s):  
Z. Krilov ◽  
A.K. Wojtanowicz ◽  
M. Tomic
Keyword(s):  
Horizontal Wells ◽  
Formation Damage

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.

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