Optimized HP/HT Acid Blends and Associative Polymer Diversion Proven to be Successful in Acid Fracturing a Multilayered Reservoir: A Case History from South Ghawar Gas Field in Saudi Arabia.

2011 ◽  
Author(s):  
Jose Ricardo Solares ◽  
Khalid Al-Asiri ◽  
Carlos Alberto Franco ◽  
Jose R. Vielma ◽  
Guillermo Antonio Izquierdo
Keyword(s):  
Saudi Arabia ◽  
Case History ◽  
Gas Field ◽  
Acid Fracturing ◽  
Associative Polymer

A Case History of Nitrogen Injection Monitoring in Rich Recycled Gas Condensate Reservoir, Onshore Gas Field, Abu Dhabi, UAE

2015 ◽  
Author(s):  
Hamza M. Hamza ◽  
Mahmood Al Suwaidi ◽  
Omar Al Jeelani ◽  
Arafat Al Yafei ◽  
Mahmoud Basioni ◽  
...  
Keyword(s):  
Case History ◽  
Gas Condensate ◽  
Abu Dhabi ◽  
Gas Field ◽  
Nitrogen Injection ◽  
Condensate Reservoir ◽  
History Of

Engineered Composite Lost Circulation Solution to Successfully Cure Total Losses During Drilling Across Naturally Fractured Formations in Ghawar Gas Field, Saudi Arabia

2021 ◽  
Author(s):  
Faizan Ahmed Siddiqi ◽  
Carlos Arturo Banos Caballero ◽  
Fabricio Moretti ◽  
Mohamed AlMahroos ◽  
Uttam Aswal ◽  
...  
Keyword(s):  
Saudi Arabia ◽  
Circulation System ◽  
Cement Slurry ◽  
Fiber System ◽  
Gas Field ◽  
Well Control ◽  
Lost Circulation ◽  
Carbonate Formation ◽  
Naturally Fractured ◽  
Zonal Isolation

Abstract Lost circulation is one of the major challenges while drilling oil and gas wells across the world. It not only results in nonproductive time and additional costs, but also poses well control risk while drilling and can be detrimental to zonal isolation after the cementing operation. In Ghawar Gas field of Saudi Arabia, lost circulation across some naturally fractured formations is a key risk as it results in immediate drilling problems such as well control, formation pack-off and stuck pipe. In addition, it can lead to poor isolation of hydrocarbon-bearing zones that can result in sustained casing pressure over the life cycle of the well. A decision flowchart has been developed to combat losses across these natural fractures while drilling, but there is no single solution that has a high success rate in curing the losses and regaining returns. Multiple conventional lost circulation material pills, conventional cement plugs, diesel-oil-bentonite-cement slurries, gravel packs, and reactive pills have been tried on different wells, but the probability of curing the losses is quite low. The success with these methods has been sporadic and shown poor repeatability, so the need of an engineered approach to mitigate losses is imperative. An engineered composite lost-circulation solution was designed and pumped to regain the returns successfully after total losses across two different formations on a gas well in Ghawar field. Multiple types of lost-circulation material were tried on this well; however, all was lost to the naturally fractured carbonate formation. Therefore, a lost-circulation solution was proposed that included a fiber-based lost-circulation control (FBLC) pill, composed of a viscosifier, optimized solid package and engineered fiber system, followed by a thixotropic cement slurry. The approach was to pump these fluids in a fluid train so the FBLC pill formed a barrier at the face of the formation while the thixotropic cement slurry formed a rapid gel and quickly set after the placement to minimize the risk of losing all the fluids to the formation. Once this solution was executed, it helped to regain fluid returns successfully across one of the naturally fractured zones. Later, total losses were encountered again across a deeper loss zone that were also cured using this novel approach. The implementation of this lost-circulation system on two occasions in different formations has proven its applicability in different conditions and can be developed into a standard engineered approach for curing losses. It has greatly helped to build confidence with the client, as it contributed towards minimizing non-productive time, mitigated the risk of well control, and assisted in avoiding any remedial cementing operations that may have developed due to poor zonal isolation across certain critical flow zones.

Mapping the internal structure of sand dunes with GPR: A case history from the Jafurah sand sea of eastern Saudi Arabia

2008 ◽  
Vol 27 (11) ◽  
pp. 1446-1452 ◽  
Author(s):  
Ademola Q. Adetunji ◽  
Abdullatif Al-Shuhail ◽  
Gabor Korvin
Keyword(s):  
Saudi Arabia ◽  
Internal Structure ◽  
Case History ◽  
Sand Dunes
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