Sour Gas Production Challenges-CASE Study

2020 ◽  
Author(s):  
Mubashir Mubashir Ahmad ◽  
Fawad Zain Yousfi ◽  
Mohamed Albadi ◽  
Mohamed Baslaib ◽  
Shamsa Alhouqani ◽  
...  
Keyword(s):  
Gas Production ◽  
Sour Gas

Gas Wells with Carbon Steel Completion, Can it Handle Sour Gas Production, Case Study

2021 ◽  
Author(s):  
Abdelrahman Gadelhak ◽  
Andrey Yugay ◽  
Gervasio Pimenta ◽  
Adeel Allah Bux ◽  
Mohamed Baslaib ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Task Force ◽  
Gas Production ◽  
Close Monitoring ◽  
Gas Wells ◽  
The North ◽  
Successful Case ◽  
Corrosion Resistant Alloy ◽  
Sour Gas

Abstract Title Gas wells with Carbon steel completion, Can it handle sour Gas production, Case Study. Objective/Scope It is a successful case of producing sour gas (up to 18% H2S and 9.2% CO2) since 2016 wells with carbon steel tubing with maintaining downhole chemical injection of corrosion inhibitor. Methods, Procedures, Process During 2014 a group of new wells has been drilled in X giant onshore gas reservoir under ADNOC onshore company operating area to maximize gas production and to meet production mandate. Majority of wells has been drilled within the North and peripheral Area of the reservoir. All wells has been completed with a standard completion with a Top completion (+/-7000 ft.) in carbon steel with downhole chemical injection valve, and a corrosion resistant alloy section below the CIV. After wells commissioning, high H2S contents were observed (Up to 18%), and Management initially instructed operations to shut in 9 wells and formulated a task force to study the applicable options and analyze the data to ensure asset integrity. The TF recommendation was to flow the wells with close monitoring of wells integrity, in particular annulus pressure A comprehensive downhole exercise has been done by Results/Observation/Conclusion Carbon steel completion with downhole chemical injection is a validated completion solution for such conditions. Novel/ Additive information Clearly, case is as a solid reference for sour gas production using conventional completion, sustaining Long-term production is adding more weight to the case conclusion.

HPHT Sour Gas Production- Case Study

2017 ◽  
Author(s):  
Mubashir Ahmad ◽  
Ihab Nabil Mohamed ◽  
Fawad Zain Yousfi ◽  
Zaher Hilal Hamdan Al Hajri ◽  
Saleem Salman Al Zaabi ◽  
...  
Keyword(s):  
Gas Production ◽  
Sour Gas

Logging Optimization and Data Analysis Enabling Bypass Pay Identification and Hydrocarbon Quantification with Advanced Pulsed Neutron Behind Casing

2021 ◽  
Author(s):  
Sviatoslav Iuras ◽  
Samira Ahmad ◽  
Chiara Cavalleri ◽  
Yernur Akashev
Keyword(s):  
Cross Section ◽  
Pore Space ◽  
High Energy ◽  
Elastic Cross Section ◽  
Gas Production ◽  
Donets Basin ◽  
Lithology Identification ◽  
Open Hole ◽  
Pulsed Neutron

Abstract Ukraine ranks the third largest gas reserves in Europe. Gas production is carried out mainly from the Dnieper-Donets Basin (DDB). A gradual decline in reserves is forcing Ukraine to actively search for possible sources to increase reserves by finding bypassed gas intervals in existing wells or exploration of new prospects. This paper describes 3 case studies, where advanced pulsed neutron logging technology has shown exceptional value in gas-bearing layer identification in different scenarios. The logging technology was applied for formation evaluation. The technology is based on the neutron interaction with the minerals and the fluids contained in the pore space. The logging tool combines measurements from multiple detectors and spacing for self-compensated neutron cross-capture section (sigma) and hydrogen index (HI), and the Fast Neutron Cross Section (FNXS) high-energy neutron elastic cross section rock property. Comprehensive capture and inelastic elemental spectroscopy are simultaneously recorded and processed to describe the elemental composition and the matrix properties, reducing the uncertainties related to drilling cuttings analysis, and overall, the petrophysical evaluation combined with other log outputs. The proposed methodology was tested in several wells, both in open hole and behind casing. In the study we present its application in three wells from different fields of the DDB. The log data acquisition and analysis were performed across several sandstone beds and carbonates formation with low porosities (<10%), in various combinations of casing and holes sizes. The results showed the robustness and effectiveness of using the advanced pulsed neutron logging (PNL) technologies in multiple cases: Case Study A: Enabling a standalone cased hole evaluation and highlighting new potential reservoir zones otherwise overlooked due to absence of open hole logs. Case Study B: Finding by-passed hydrocarbon intervals that were missed from log analysis based on conventional open hole logs for current field operator. Case Study C: Identifying gas saturated reservoirs and providing solid lithology identification that previously was questioned from drilling cuttings in an unconventional reservoir.

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

The Importance of Elemental Sulphur, Mercury and Condensate Identification in Sour Gas Field Development Project: Case Study

2014 ◽  
Author(s):  
Ardian Nengkoda ◽  
Mofeed Awwami ◽  
Xiaolong Cai ◽  
Jamal Mufleh ◽  
Bader Harbi ◽  
...  
Keyword(s):  
Development Project ◽  
Elemental Sulphur ◽  
Gas Field ◽  
Field Development ◽  
Sour Gas

scholarly journals Energy Sector Development: System Dynamics Analysis

2019 ◽  
Vol 10 (1) ◽  
pp. 134 ◽  
Author(s):  
Mohamd Laimon ◽  
Thanh Mai ◽  
Steven Goh ◽  
Talal Yusaf
Keyword(s):  
System Dynamics ◽  
Fossil Fuel ◽  
High Energy ◽  
Energy Sector ◽  
Gas Production ◽  
Dynamic Complexity ◽  
Total Consumption ◽  
Limits To Growth ◽  
Fuel Resource

The development of a complex and dynamic system such as the energy sector requires a comprehensive understanding of its constituent components and their interactions, and thus requires approaches that can adapt to the dynamic complexity in systems. Previous efforts mainly used reductionist approaches, which examine the components of the system in isolation, neglecting their interdependent nature. Such approaches reduce our ability to understand the system and/or mitigate undesirable outcomes. We adopt a system dynamics approach to construct an integrated model for analysing the behaviour of the energy sector. Although the Australian energy sector is used as a case study, the model can be applied in other context elsewhere around the world The results indicate that the current trajectory of the Australian energy sector is unsustainable and growth is not being controlled. Limits to growth are fast approaching due to excessive fossil fuel extraction, high emissions and high energy dependency. With the current growth, Australia’s global CO2 emissions footprint will increase to unprecedented levels reaching 12% by 2030 (9.5% for exports and 2.5% for domestic). Oil dependency will account for 43% and 47% of total consumption by 2030 and 2050. By 2032, coal will be the only fossil fuel resource available in Australia. Expansion of investment in coal and gas production is a large risk.

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.

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