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Abstract Natural gas coming from the well contains hydrocarbons, CO2, H2S, and water together with many other impurities. Molecular sieve treatment of the gas is required to make it suitable for the various applications. The several process and parameters considerations contribute to the reliable and optimized operation of molecular sieve natural gas treaters. The journey of this molecular sieve treater optimization commenced by conducting a thorough systematic study of all existing treater performance by considering various operating critical parameter. The technical feasibility studies were completed covering all the aspects like evaluating current performance of treater, conducting simulation for future capacity, licensor endorsement, conducting breakthrough test. Finally, study outcomes were implemented through management change process. The main benefits of optimization of molecular sieve treater process are to extend the service life of molecular sieve which enable us to increase the turnaround cycle of NGL trains. Significant reduction in CAPEX and OPEX cost were realized by reducing new fresh molecular sieve procurement, reducing disposal of molecular sieve waste material and expense of shutdown, achieving 100% HSE. This paper presents the typical operation issues and challenges in molecular sieve treatment process, best practices adopted for maximizing of existing assets considering the current and design scenarios, and performance improvement, which result to extend molecular sieve life, increase of NGL shutdown cycle and flaring reduction in trains.
- Energy > Oil & Gas > Upstream (1.00)
- Energy > Oil & Gas > Downstream (1.00)
- Energy > Oil & Gas > Midstream (0.96)
- Materials > Chemicals > Commodity Chemicals > Petrochemicals (0.94)
- Health, Safety, Environment & Sustainability (1.00)
- Facilities Design, Construction and Operation > Processing Systems and Design (1.00)
- Facilities Design, Construction and Operation > Natural Gas Conversion and Storage > Liquified natural gas (LNG) (0.94)
- (4 more...)
Abstract Protection of bunds and slopes is of prime importance in Oil and Gas facilities, in order to contain hydrocarbon products and to protect soil erosion. This paper highlights some slope protection challenges and mitigation techniques comparing the conventional systems and describes the evaluation methodology including Sustainability and Cost optimization potential of a new material "Concrete Impregnated Fabric". The knowledge obtained in determining the evaluation criteria and methodology of this slope protection system is worth sharing with industry professionals. Conventional slope protection involves mainly gatch and concrete lining. While the design life of gatch being less, use of reinforced concrete is non-sustainable. The main challenge in slope protection is "slope stability" involving the type of soil to be retained and slope angle. Various polymeric products named as Geo-strips, Geogrids, etc. are used for soil reinforcement. Steel mesh surrounded Gabion retaining structures are used for retaining very high slopes. New technologies such as "Mastic grouted mattresses" are more suitable for sloped surfaces of coastal areas. "Concrete Impregnated Fabric" or "Geo-synthetic Cementitious Composite Mat (GCCM)", a new material that hardens on hydration was found suitable for quick construction and has many more advantages. Technical evaluation criteria and detailed evaluation process in selecting this slope protection system is described in this paper. Technical information, features and installation methods of the product have been collected from the manufacturer and subjected to a detailed desk study. After initial review, the product with its varying thicknesses was applied on mock-up bund, demonstrating laying, joint-fixing, end-anchoring and initial hydration. This event has been witnessed by more than a dozen of engineers from all plants of ADNOC Gas Processing. The trial site was left exposed to atmosphere and revisited after 6 months and the condition ascertained. Physical properties listed in the information brochure have been verified by carrying out third party laboratory tests in UAE based on various international codes and witnessed by professional team. Also as part of evaluation process, in a pilot project, it was applied on pipeline bund area of about 4000 Sqm. Apart from the sustainability aspects and techno-commercial analysis, other advantages of the product such as design-life of 50 years, construction ease, 24% cost saving compared to concrete lining and feedback from previous users, etc. were evaluated and captured in a comprehensive report based on which it was accepted for use on slopes without any loads. Evaluation of this fit-for-purpose slope protection system including its pilot application will be useful for all relevant stakeholders.
- Health, Safety, Environment & Sustainability (1.00)
- Management (0.91)
- Facilities Design, Construction and Operation > Processing Systems and Design > Gas processing (0.69)
Abstract Post commissioning of the new AGDAS gas treatment facility (Offshore Associated Gas (OAG)), several failures in 316L stainless steel piping and equipment occurred. Since OAG commissioning in November 2010 till October 2011, 13 failures were recorded. All failure investigatios concluded that the immediate cause of failure was internal Chlorides Stress Corrosion Cracking (ClSCC). ADGAS considred actions to ensure the safe and efficient operation of OAG. To quantify the inherent risk associated with the operation of OAG assets under the likelihood of failure due to ClSCC, a Risk Based Assessment (RBA) exercise was conducted by an ADGAS multi-disciplinary team. Results of this assessment were used for as the basis for determining the risk associated with each and every stainless steel asset, prioritise the replacement works and plan for inspection and monitoring. In otherwords, provide the basis to evaluate the extent of the problem and hence put a mitigation plan. A tool for risk (RBA) evaluation of ClSCC was developed in house. This key activity paved the road towards setting an overall action plan to contain the OAG risk of ClSCC. The action plan has managed to prevent further leaks in OAG. Action plan included the launch of special advanced nondestructive testing program capable of detecting premature stress cracks in stainless steel, temporary composite wrap repairs at specific high risk locations, a dedicated emergency and HSE program in addition to other actions. Chlorides stress cracking leaks could have resulted in major consequences in terms of HSE, loss of production and disruption in gas supply.
- Asia > Azerbaijan > Agdas > Agdas (0.24)
- Asia > Middle East > UAE > Abu Dhabi Emirate > Abu Dhabi (0.15)
- Materials > Metals & Mining > Steel (1.00)
- Energy > Oil & Gas > Upstream (1.00)
- Production and Well Operations > Production Chemistry, Metallurgy and Biology > Corrosion inhibition and management (including H2S and CO2) (1.00)
- Management (1.00)
- Health, Safety, Environment & Sustainability (1.00)
- (3 more...)
This paper was prepared for presentation at the 1999 SPE Middle East Oil Show held in Bahrain, 20-23 February 1999.
- North America (1.00)
- Europe (1.00)
- Asia > Middle East > UAE > Abu Dhabi Emirate (0.17)
- Materials > Chemicals (1.00)
- Law (1.00)
- Energy > Oil & Gas > Upstream (1.00)
- Government > Regional Government > Asia Government > Middle East Government > UAE Government (0.32)
- Oceania > Papua New Guinea > Papuan Peninsula > Central Province > National Capital District > Petroleum Retention License 15 > P’nyang Field (0.89)
- Oceania > Papua New Guinea > Papuan Peninsula > Central Province > National Capital District > Petroleum Retention License 15 > Elk-Antelope Field (0.89)
- Oceania > Papua New Guinea > Papuan Peninsula > Central Province > National Capital District > Petroleum Retention License 15 > Angore Field (0.89)
- (10 more...)
- Reservoir Description and Dynamics > Improved and Enhanced Recovery (1.00)
- Health, Safety, Environment & Sustainability > Health > Noise, chemicals, and other workplace hazards (1.00)
- Health, Safety, Environment & Sustainability > Environment > Climate change (1.00)
- (5 more...)