This paper investigates novel approaches to sour-gas treatment for use in the Middle East that are outside the common oil and gas market and compares them with traditional techniques. In the complete paper, a new, fully coupled implicit tool was used to model an onshore Omani asset with multiple reservoirs, each featuring different fluids and multiple networks. Processing sour natural gas is a challenge. If mercaptans are present in the sour gas, the limited mercaptan-absorption capacity of the well-known alkanolamine solvents can be a problem. An Excel-based tool was developed that uses cubic-equation-of-state (EOS) and thermodynamic electrolyte-chemistry modeling to assess sour-production streams.
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ADNOC and CNOOC will explore multiple new opportunities for collaboration across the upstream and downstream sectors in the UAE and China. The laboratory will be used primarily to test the sulfide stress cracking resistance of carbon steel alloys for oil wells and offshore drilling applications. The paper discusses the main factors affecting CO2 corrosion, provides an assessment of what to look for in major equipment, and details recommended material of construction and corrosion mitigation/control methods. This paper focuses on a numerical-modeling analysis of the acid-gas-injection (AGI) scenario in carbonate HP/HT reservoirs, and presents the way in which AGI impacts asphaltene-precipitation behavior. When panels in an instrument equipment shelter kept tripping and the occasional smell of H2S led to an investigation of the rationale.
This course will help attendees develop the awareness of the cost of corrosion and how it can be managed and mitigated. It teaches the skills of dealing with chemicals, techniques to evaluate their performances, chemical applications and design to control corrosion. It will also help attendees learn corrosivity monitoring and the efficiency of the treatment. This course will help broaden your general knowledge around oilfield corrosion and its impact and control options. Participants will familiarize themselves with the various lab techniques used for evaluation of corrosion inhibitors.
When panels in an instrument equipment shelter kept tripping and the occasional smell of H2S led to an investigation of the rationale. Although a rare occurrence, this paper presents a strategy for prevention through careful site selection. A wide range of corrosive elements and compounds from a variety of crudes has led to a renewed industry focus on corrosion and the effects it has on pipelines and vessels. Through a range of experiments the authors demonstrate that small amount of H2S can be beneficial in reducing corrosion in 3% Cr steel. Offshore production systems can be impacted negatively by numerous problems attributed to bacterial activity, associated hydrogen sulfide and biogenic iron sulfides, and mercaptan production.
This feature takes a look at the work being done by companies to improve corrosion inhibitor fluids and inhibition techniques for offshore projects. A wide range of corrosive elements and compounds from a variety of crudes has led to a renewed industry focus on corrosion and the effects it has on pipelines and vessels. As the world's supply of crude becomes heavier, many of the world’s oil producers will have to think more carefully about heavy crudes and the challenges they pose for processing, storage, and transportation. Semoga and Kaji fields experienced reservoir souring and suffered a history of calcium-carbonate (CaCO3) -scale cases before a proper scale-inhibition program was implemented. Problems with a free water knockout discovered continued scale issues, leading to investigation of the reasons.
Southwest Research Institute is adding a new facility to its capabilities in testing and evaluating subsea equipment and systems. This review of papers illustrates some of the innovative solutions used in the region. This paper focuses on a numerical-modeling analysis of the acid-gas-injection (AGI) scenario in carbonate HP/HT reservoirs, and presents the way in which AGI impacts asphaltene-precipitation behavior. This paper demonstrates a design methodology that combines the API and American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessels Code (BPVC) for designing an example subsea pressure containing component for HP/HT conditions greater than 15,000 psi and 250°F.
Corrosion management is a key concern in all oil and gas assets due to the nature of fluids produced and injected throughout their life cycle. This is applicable for all asset types, regardless of their age and the level of corrosive agents presence in the flow stream, be it CO2, H2S, water or chloride. Every operator in the world today is facing the challenges of extending the life of their aging assets which are often degraded by corrosion which poses well integrity risks. Meanwhile, new green field development tapping hydrocarbon are confronted by highly corrosive contaminants as the low lying, easy wells have been mostly exploited.
Corrosion downhole in oil and gas wells and surface equipment constructed from carbon steel, generally occurs due to the presence of acidic gases (H2S and CO2) or organic acids in the production streams. In addition, solids can cause erosion-corrosion of downhole tubulars and surface pipework if sufficient gas or liquid velocity exists. Surface or topsides pipework and separation equipment can also suffer from corrosion due to bacteria activity. To control downhole and surface corrosion, several technologies are available including corrosion resistant alloys, coatings, biocides, H2S scavengers, and corrosion inhibitors. This session will discuss key lessons learnt in mitigating corrosion and erosion-corrosion downhole in oil and gas wells as well as surface facilities.