scholarly journals Investigating on the Prediction Model of Sulfur Deposition in High Sour Gas-Well

2012 ◽  
Vol 29 ◽  
pp. 4267-4272 ◽  
Author(s):  
Zeng Shun-peng ◽  
Yang Xiu-wen ◽  
Zhang Qi-min ◽  
Xu Chun-bi ◽  
Liu Jingcheng ◽  
...  
Keyword(s):  
Prediction Model ◽  
Sulfur Deposition ◽  
Gas Well ◽  
Sour Gas

Deep Workover Challenges of an HP/HT Sour Gas Well - Case History of Mutriba 12

2011 ◽  
Author(s):  
Mohammed Jasem Al-Saeedi ◽  
Fayez Abdulrahman Al Fayez ◽  
Dakhil Rasheed Al Enezi ◽  
mahesh sounderrajan ◽  
Mishary Najeeb Al-Mudhaf ◽  
...  
Keyword(s):  
Case History ◽  
Gas Well ◽  
History Of ◽  
Sour Gas

Turbodrill Bottomhole Assembly and Real-Time Data Improve Through-Tubing Coiled-Tubing Drilling Operations in Sour Gas Well

2015 ◽  
Author(s):  
A. Ebrahimi ◽  
P. J. Schermer ◽  
W. Jelinek ◽  
D. Pommier ◽  
S. Pfeil ◽  
...  
Keyword(s):  
Real Time ◽  
Time Data ◽  
Gas Well ◽  
Coiled Tubing ◽  
Real Time Data ◽  
Drilling Operations ◽  
Sour Gas

A Dynamic Workflow of Well Health Issue Prediction – Sulfur Deposition

2021 ◽  
Author(s):  
Bashirul Haq
Keyword(s):  
Material Balance ◽  
Gas Production ◽  
Health Issue ◽  
Sulfur Deposition ◽  
Gas Reservoirs ◽  
Gas Field ◽  
Actual Performance ◽  
Sulphur Deposition ◽  
Balance Analysis ◽  
Sour Gas

Abstract Sour gas reservoirs are vital sources for natural gas production. Sulphur deposition in the reservoir reduces a considerable amount of gas production due to permeability reduction. Consequently, well health monitoring and early prediction of Sulphur deposition are crucial for effective gas production from a sour gas reservoir. Dynamic gas material balance analysis is a useful technique in calculating gas initially in place utilizing the flowing wellhead or bottom hole pressures and rates during the well's lifetime. The approach did not apply to monitor a producing gas's health well and detect Sulphur deposition. This work aims to (i) modify dynamic gas material balance equation by adding the Sulphur deposition term, (ii) build a model to predict and validate the issue utilizing the modified equation. A unique form of the flowing material balance is developed by including Sulphur residue term. The curve fitting tool and modified flowing gas material balance are applied to predict well-expected behaviour. The variation between expected and actual performance indicates the health issue of a well. Initial, individual components of the model are tested. Then the model is validated with the known values. The workflow is applied to active gas field and correctly detected the health issue. The novel workflow can accurately predict Sulphur evidence. Besides,the workflow can notify the production engineers to take corrective measures about the subject. Keywords: Sulfur deposition, Dynamic gas material balance analysis, Workflow

Resin Squeeze Operation to Successfully Seal Micro-Channels and Eliminate Sustained Casing Pressure of a Sour Gas Well

2021 ◽  
Author(s):  
Ying Wang ◽  
Xin Zheng ◽  
Li Li ◽  
Jianbo Yuan ◽  
Minh Vo ◽  
...  
Keyword(s):  
Good Condition ◽  
Water Injection ◽  
Injection Rate ◽  
Gas Well ◽  
Wellhead Pressure ◽  
Low Viscosity ◽  
Resin Injection ◽  
Micro Channels ◽  
Sustained Casing Pressure ◽  
Sour Gas

Abstract This paper describes the successful resin squeeze operation to seal off a micro-annulus between the 7" and 9-5/8" casings on a sour gas well located in Sichuan Basin, China. Integrated plug and abandonment were also essential to eliminate the risk of potential H2S exposure presented to the residents around this area. Resin, as a new alternative sealing technology, was technically evaluated, laboratory tested, and then chosen for squeezing into a micro-annulus to stop gas migration for its solids-free and low-viscosity properties compared to a conventional cement. The squeeze job was designed by taking the casing yield strength as the pressure limit (Confirmed by caliper log the casing was in good condition) and determining the resin pumping volume based on estimated resin squeeze volume and the remaining resin plug length. A "Braden-head" squeeze method was selected considering the low injection rate observed during the water injection test. Both stage-up and stage down squeezing techniques (hesitation squeeze of increasing and decreasing wellhead pressure stage by stage) were performed to maximize the injected volume of the resin sealant. A total of 800 L of 9.16 lb/gal resin was placed into a 4 ft milled interval, and 50 L were successfully squeezed into the 7" × 9-5/8" casing annulus. An operational learning was that resin injection is greatly improved during the stage-down process while keeping the casing annulus open. Evidence that the micro-annulus leak path had been sealed was an observation of 0 psi on the 7" × 9-5/8" casing annulus after resin fully set. The method of locating the optimal spot to squeeze resin involved noise logging to analyze for a potential gas source in the annulus. The post job results confirmed that resin acts effectively as an annular barrier in the repair of gas leaks in the small volume situations where micro-annulus exists in the cement sheath. For large voids such as inside 7" casing, a combination of cement plug plus mechanical barrier is recommended to be placed directly above resin plugs to complete permanent plug and abandonment of the wellbore.

Solid Management Optimization for Offshore Big Bore HP/HT Sour Gas Well Cleanup

2020 ◽  
Author(s):  
Ardian Nengkoda ◽  
Abdallah Qahtani ◽  
Sami Logan ◽  
Mostafa Youssef ◽  
Alastair Sinker
Keyword(s):  
Gas Well ◽  
Management Optimization ◽  
Sour Gas

Research and Application of Material Corrosion Prevention Technology in the Completed well System for Sour Gas well

2013 ◽  
Vol 712-715 ◽  
pp. 1096-1099
Author(s):  
Ling Feng Li
Keyword(s):  
Steel Corrosion ◽  
Gas Production ◽  
Corrosion Prevention ◽  
Gas Reservoirs ◽  
Gas Field ◽  
Gas Well ◽  
Corrosion Resistant Alloy ◽  
System Life ◽  
Sour Gas

For natural gas well in sour gas reservoirs, very serious corrosion in the completed well system is an important factor of gas production system life. In order to ensure the long-term development of gas wells, this paper mainly introduces material corrosion prevention technology in the completed well system, such as corrosion-resistant alloy steel corrosion control technology, bimetallic combination tubing, corrosion inhibitor technology and so on. By taking LJ Gas Field as an example, this paper introduces the material corrosion prevention technology in the completed well system in LJ Gas Field. For application in the completed well system in LJ Gas Field, the technology above have good performance of corrosion resistance.

Research on Tubing and Casing Corrosion in Sour Gas Reservoirs and Corrosion-Resistant Material Selection

2013 ◽  
Vol 690-693 ◽  
pp. 1516-1519
Author(s):  
Ling Feng Li
Keyword(s):  
Material Selection ◽  
Gas Production ◽  
Resistant Material ◽  
Gas Reservoirs ◽  
Gas Well ◽  
Corrosion Resistant ◽  
System Life ◽  
Sour Gas ◽  
Selection Of

For natural gas well in sour gas reservoirs, very serious corrosion in the gas well string is an important factor of gas production system life. In order to ensure the long-term development of gas wells, this paper mainly introduces the tubing and casing corrosion in sour gas reservoirs, corrosion-resistant material selection of tubing and casing in sour gas reservoirs and proposes the optimization idea and technique of tubing material selection.. By taking W 63 well as an example, this paper optimizes the material selection of production casing for W 63 well. For application, the optimal materials of gas well string in W 63 well have good performance of corrosion resistance.

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