Assessing the Impact of Open Hole Gravel Pack Completions to Remediate the Observed Productivity Decline in Cased Hole FracPack Completions in Deepwater Gulf of Mexico Fields

2018 ◽  
Author(s):  
Karim Zaki ◽  
Yan Li ◽  
Clinton Terry
Keyword(s):  
Gulf Of Mexico ◽  
Productivity Decline ◽  
Open Hole ◽  
Gravel Pack ◽  
The Impact

Securing Zonal Isolation Across a Highly Depleted GoM Deep Water Reservoir

2021 ◽  
Author(s):  
Yosafat Esquitin ◽  
Chima Chima ◽  
Ricardo Vasques ◽  
Paul Hazel ◽  
Brian Schwanitz
Keyword(s):  
Gulf Of Mexico ◽  
Net Present Value ◽  
Water Reservoir ◽  
Cost Savings ◽  
A Value ◽  
Optimum Placement ◽  
Open Hole ◽  
Zonal Isolation ◽  
Logging While Drilling ◽  
The Impact

Abstract Effective zonal isolation within a layered reservoir in the Gulf of Mexico is a necessity to meet regulations for stacked reservoirs and to maximize total recoverables. Effective zonal isolation also ensures maximum production is achieved via a high-pressure proppant fracture treatment. A primary cement operation of a 10 1/8" production liner (within a 12 ¼" drilled hole section) was challenging due to a combination of high equivalent circulation density (ECD) and potential losses across a layered GOM reservoir. One layer had potential and significant depletion up to 8,000 psi. Critical well parameter considerations were: maintaining the liner burst of 18,200 psi, maximizing rotation and reciprocation capability of the liner, minimizing the impact on circulation and ECD, and ensuring compatibility with the mud systems. Following careful job planning, including the analysis of caliper data from logging while drilling (LWD) for the optimum placement, two metal expandable packers (MEPs) were installed on the 10 1/8" liner. The MEPs were positioned to straddle the highly depleted layer (one above and one below) in the 12 ¼" open hole section. The liner was deployed, and the cement operation was executed with minimal ECD impact from the inclusion of the MEPs. Surface pressure was applied to create sufficient differential pressure across the 10 1/8" liner wall to hydraulically expand the MEPs quickly under full surface control. This paper covers the qualification, planning, and deployment of MEPs to provide cement assurance (CA) for zonal isolation and improve the effectiveness of contingency cement squeezes. Though this technology has been used in other regions for several years, this was the first deployment in the Gulf of Mexico (GOM). The solution improved the probability of success of the primary cement job, negating the requirement for a remedial cement squeeze. The decision to run MEPs was based on the estimated cost savings of 3.5 million USD for remedial squeeze operations, a value proposition that did not account for the net present value (NPV) gain, due to improved fracture placement, compared to the case of poor cement isolation.

Challenging Catenary Coiled Tubing Thru Tubing Screen Deployment Operation Offshore Borneo

2021 ◽  
Author(s):  
Seng Wei Jong ◽  
Yee Tzen Yong ◽  
Yusri Azizan ◽  
Richard Hampson ◽  
Rudzaifi Adizamri Hj Abd Rani ◽  
...  
Keyword(s):  
Oil Wells ◽  
Well Control ◽  
Coiled Tubing ◽  
Open Hole ◽  
Catenary System ◽  
Offshore Oil ◽  
Gravel Pack ◽  
Emergency Measures

Abstract Production decline caused by sand ingress was observed on 2 offshore oil wells in Brunei waters. Both wells were completed with a sub-horizontal openhole gravel pack and were subsequently shut in as the produced sand would likely cause damage to the surface facilities. In an offshore environment with limited workspace, crane capacity and wells with low reservoir pressures, it was decided to intervene the wells using a catenary coiled tubing (CT) vessel. The intervention required was to clean out the sand build up in the wells and install thru-tubing (TT) sand screens along the entire gravel packed screen section. Nitrified clean out was necessary due to low reservoir pressures while using a specialized jetting nozzle to optimize turbulence and lift along the deviated section. In addition, a knockout pot was utilized to filter and accommodate the large quantity of sand returned. The long sections of screens required could not be accommodated inside the PCE stack resulting in the need for the operation to be conducted as an open hole deployment using nippleless plug and fluid weight as well control barrier. A portable modular crane was also installed to assist the deployment of long screen sections prior to RIH with CT. Further challenges that needed to be addressed were the emergency measures. As the operation was to be conducted using the catenary system, the requirement for an emergency disconnect between the vessel and platform during the long cleanout operations and open hole deployment needed to be considered as a necessary contingency. Additional shear seal BOPs, and emergency deployment bars were also prepared to ensure that the operation could be conducted safely and successfully.

Practical Optimization of Industrial Gravel Size in Gravel Packed Well

2011 ◽  
Vol 201-203 ◽  
pp. 383-387
Author(s):  
Jin Gen Deng ◽  
Yu Chen ◽  
Li Hua Wang ◽  
Wen Long Zhao ◽  
Ping Li
Keyword(s):  
Design Method ◽  
Control Measures ◽  
Control Effect ◽  
Gravel Layer ◽  
Gravel Size ◽  
Sand Control ◽  
Gravel Packing ◽  
Gravel Pack ◽  
The Impact ◽  
Computing Method

In the design of gravel packing sand control, the reasonable selection of gravel size is one of the keys to implementing sand control measures successfully. Aiming at the defects of commonly used methods of gravel size design and the characteristic that the gravel used in field operation is actually a mixture of gravel with multiple grain diameters, this paper builds a model of pore structure in gravel layer through researching the gravel pack structure caused by the gravel of two grain diameters mixed under actual packing conditions, calculates and analyzes the pore sizes in gravel layer. Ultimately, based on Saucier method, this paper presents a new gravel size optimization idea for gravel packing sand control with multiple grain diameters mixed, which agrees with the actual situation of industrial gravel, and gives the idea’s computing method. Considering the ideality of the model in this paper, the author has modified the computing method to make it more fit for the actual packing situation. This gravel size design method also gives consideration to the impact of formation sand uniformity on sand control effect, so it have the characteristics of good practicability, wide applicability and more accurate than other conventional methods.

scholarly journals Assessing the impact of oil-related activities on benthic macroinfauna assemblages of the Campeche shelf, southern Gulf of Mexico

2005 ◽  
Vol 289 ◽  
pp. 89-107 ◽  
Author(s):  
HA Hernández Arana ◽  
RM Warwick ◽  
MJ Attrill ◽  
AA Rowden ◽  
G Gold-Bouchot
Keyword(s):  
Gulf Of Mexico ◽  
Southern Gulf Of Mexico ◽  
The Impact

The impact of the 1997–1999 warm-SST and low-productivity episode on fisheries in the southwestern Gulf of Mexico

Hydrobiologia ◽  
2008 ◽  
Vol 610 (1) ◽  
pp. 257-267 ◽  
Author(s):  
M. Manzano-Sarabia ◽  
C. A. Salinas-Zavala ◽  
M. Kahru ◽  
S. E. Lluch-Cota ◽  
A. González-Becerril
Keyword(s):  
Gulf Of Mexico ◽  
The Impact

On the Analysis of Factors Causing Labor Productivity Decline as an Element in Evaluating the Operating Efficiency of Air Transport Organizations

2021 ◽  
Vol 27 (10) ◽  
pp. 816-822
Author(s):  
T. A. Tikhomirova ◽  
O. A. Krasnenkova
Keyword(s):  
Labor Productivity ◽  
Negative Impact ◽  
Air Transport ◽  
Operating Efficiency ◽  
Economic Factors ◽  
Legal Standards ◽  
Labor Efficiency ◽  
Conflict Situations ◽  
Productivity Decline ◽  
The Impact

Aim. The presented study aims to determine the impact of factors causing labor productivity decline on the operating efficiency of air transport organizations.Tasks. The authors examine the types of factors influencing the level of labor productivity among different employee categories in air transport enterprises; identify external and internal factors and measures aimed at reducing their negative impact when analyzing the operating efficiency of air transport enterprises.Methods. This study uses general scientific methods of cognition in various aspects to examine economic factors causing labor efficiency decline among production and management staff.Results. The impact of regulatory documents of various levels on labor efficiency decline in air transport organizations is investigated. The behavior of management personnel in conflict situations is analyzed as one of the factors reducing labor productivity at the enterprise. The most typical causes of conflict escalation in an organization are described and methods for preventing them or mitigating their destructive consequences are proposed.Conclusions. Analyzing labor efficiency as part of a comprehensive economic analysis of enterprise activities is crucial for the further development of the aviation business. Labor efficiency analysis involves identifying the causes of labor productivity decline and possible directions for finding ways to prevent their negative impact. In addition to economic factors, which are manifested in the adoption of legal standards, it is necessary to take measures aimed at mitigating the impact of socio-psychological factors.  

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