This document summarizes gas hydrate problems faced by Petroleum Development Oman in their oil production operations and their integrated inhibition program to address it. Specifically:
1) Gas hydrates were forming in gas lift lines during Oman's coldest winter months, causing wells to cease production. Methanol was used as a hydrate inhibitor but posed health, safety and environmental issues.
2) The project aimed to find alternative, safer hydrate inhibitors and develop an early warning system to detect hydrate formation before pipeline blockages.
3) Laboratory tests showed that combining a kinetic hydrate inhibitor with 20% monoethylene glycol (MEG) achieved over 40 hours of hydrate protection at low inhibitor doses and was
Gas hydrate
To prepare natural gas for sale, its undesirable components (water, H2S and CO2) must be removed. Most natural gas contains substantial amounts of water vapor due to the presence of connate water in the reservoir rock. At reservoir pressure and temperature, gas is saturated with water vapor
Liquefied Natural Gas (LNG) Production Process ; Production of LNG; LNG industry and Technology (or LNG Value Chain); Liquefaction :Train Size; Compressor Drive Efficiency; Transportation; Pipe; Shipping; Tanker; Major Natural Gas Trade Movements ; Regasification; Storage ; How much does LNG cost?
Clathrates ; Hydrate ; Gas Hydrate; Hydrates Fundamentals; Typical Hydrate forming Gases; STRUCTURAL GEOMETRIES OF GAS HYDRATES; CONCERN ASSOCIATED WITH GAS HYDRATE; TYPES OF METHANE HYDRATE DEPOSITS; The stability of methane hydrate in nature; GAS HYDRATE PETROLEUM SYSTEM:; Gas hydrate stability conditions; WORLD GAS HYDRATE RESOURCE; Resource Pyramid for Gas Hydrates; Do We have the Technology to Extract Methane from Gas Hydrates?; DEPOSITIONAL ENVIRONMENT OF METHANE HYDRATE ; Where are Gas Hydrates Located?; PRODUCTION FROM HYDRATES; Gas Production Methods form Hydrates’ Thermal Stimulation; Depressurization; Inhibitor Injection; CO2 Sequestration; THE FUTURE OF METHANE HYDRATES
Gas hydrate
To prepare natural gas for sale, its undesirable components (water, H2S and CO2) must be removed. Most natural gas contains substantial amounts of water vapor due to the presence of connate water in the reservoir rock. At reservoir pressure and temperature, gas is saturated with water vapor
Liquefied Natural Gas (LNG) Production Process ; Production of LNG; LNG industry and Technology (or LNG Value Chain); Liquefaction :Train Size; Compressor Drive Efficiency; Transportation; Pipe; Shipping; Tanker; Major Natural Gas Trade Movements ; Regasification; Storage ; How much does LNG cost?
Clathrates ; Hydrate ; Gas Hydrate; Hydrates Fundamentals; Typical Hydrate forming Gases; STRUCTURAL GEOMETRIES OF GAS HYDRATES; CONCERN ASSOCIATED WITH GAS HYDRATE; TYPES OF METHANE HYDRATE DEPOSITS; The stability of methane hydrate in nature; GAS HYDRATE PETROLEUM SYSTEM:; Gas hydrate stability conditions; WORLD GAS HYDRATE RESOURCE; Resource Pyramid for Gas Hydrates; Do We have the Technology to Extract Methane from Gas Hydrates?; DEPOSITIONAL ENVIRONMENT OF METHANE HYDRATE ; Where are Gas Hydrates Located?; PRODUCTION FROM HYDRATES; Gas Production Methods form Hydrates’ Thermal Stimulation; Depressurization; Inhibitor Injection; CO2 Sequestration; THE FUTURE OF METHANE HYDRATES
Some of our recent solubility work: the behavior of mercury in water alcohols, monoethylene glycol and triethylene glycol - thanks to Dr Gallup and Dr O'Rear for their contributions and effort.
This is a report on the design of a plant to produce 20 million standard cubic feet per day (0.555 × 106 standard m3/day) of hydrogen (H2) of at least 95% purity from heavy fuel oil (HFO) with an upstream time of 7680 hours/year applying the process of partial oxidation of the heavy oil feedstock.
Seminar Report on Heat transfer in metallic hydrideMOHAMED ALI JAHAR
The hydrogen economy has been under rapid growth and development in recent years. Metal hydride based hydrogen storage systems deserve attention as they offer higher storage densities compared to high-pressure gas storage. It is the most compatible and economic method to store hydrogen. In these metal hydride storage devices, low heat transfer has been a key issue. The heat transfer rate can be enhanced by using various techniques.
A two-dimensional numerical analysis of coupled heat and mass transfer processes in a cylindrical metal hydride reactor containing MmNi4·6Al0·4 is presented. Performance studies on MmNi4·6Al0·4 based hydrogen storage device are carried out by varying the hydrogen supply pressure, absorption (cooling fluid) temperature and hydride bed thickness.
The hydrogen economy has been under rapid growth and development in recent years. Metal hydride based hydrogen storage systems deserve attention as they offer higher storage densities compared to high-pressure gas storage. It is the most compatible and economic method to store hydrogen. In these metal hydride storage devices, low heat transfer has been a key issue. The heat transfer rate can be enhanced by using various techniques.
A two-dimensional numerical analysis of coupled heat and mass transfer processes in a cylindrical metal hydride reactor containing MmNi4·6Al0·4 is presented. Performance studies on MmNi4·6Al0·4 based hydrogen storage device are carried out by varying the hydrogen supply pressure, absorption (cooling fluid) temperature and hydride bed thickness.
Presentation: DOE Stetsoon Hydrogen Storage technologieschrisrobschu
Hydrogen Storage Technologies –
A Tutorial
with Perspectives from the US National Program
Ned T. Stetson
U. S. Department of Energy
1000 Independence Ave., SW
Washington, DC 20585
Materials Challenges in Alternative and Renewable Energy
Cocoa Beach, FL
February 22, 2010
• Why do we need better hydrogen storage?
• Physical storage technologies
– Liquid
– Compressed
– Cryo-compressed
• Materials-based storage technologies
– Hydrogen sorbents
– Metal hydrides
– Complex hydrides
– Chemical hydrogen storage
Doe stetson hydrogen_storage_technologies_tutorial
Selection of amine solvents for CO2 capture from natural gas power plant - presentation by Jiafei Zhang of Imperial College London at the UKCCSRC Natural Gas CCS Network Meeting at GHGT-12, Austin, Texas, October 2014
Some of our recent solubility work: the behavior of mercury in water alcohols, monoethylene glycol and triethylene glycol - thanks to Dr Gallup and Dr O'Rear for their contributions and effort.
This is a report on the design of a plant to produce 20 million standard cubic feet per day (0.555 × 106 standard m3/day) of hydrogen (H2) of at least 95% purity from heavy fuel oil (HFO) with an upstream time of 7680 hours/year applying the process of partial oxidation of the heavy oil feedstock.
Seminar Report on Heat transfer in metallic hydrideMOHAMED ALI JAHAR
The hydrogen economy has been under rapid growth and development in recent years. Metal hydride based hydrogen storage systems deserve attention as they offer higher storage densities compared to high-pressure gas storage. It is the most compatible and economic method to store hydrogen. In these metal hydride storage devices, low heat transfer has been a key issue. The heat transfer rate can be enhanced by using various techniques.
A two-dimensional numerical analysis of coupled heat and mass transfer processes in a cylindrical metal hydride reactor containing MmNi4·6Al0·4 is presented. Performance studies on MmNi4·6Al0·4 based hydrogen storage device are carried out by varying the hydrogen supply pressure, absorption (cooling fluid) temperature and hydride bed thickness.
The hydrogen economy has been under rapid growth and development in recent years. Metal hydride based hydrogen storage systems deserve attention as they offer higher storage densities compared to high-pressure gas storage. It is the most compatible and economic method to store hydrogen. In these metal hydride storage devices, low heat transfer has been a key issue. The heat transfer rate can be enhanced by using various techniques.
A two-dimensional numerical analysis of coupled heat and mass transfer processes in a cylindrical metal hydride reactor containing MmNi4·6Al0·4 is presented. Performance studies on MmNi4·6Al0·4 based hydrogen storage device are carried out by varying the hydrogen supply pressure, absorption (cooling fluid) temperature and hydride bed thickness.
Presentation: DOE Stetsoon Hydrogen Storage technologieschrisrobschu
Hydrogen Storage Technologies –
A Tutorial
with Perspectives from the US National Program
Ned T. Stetson
U. S. Department of Energy
1000 Independence Ave., SW
Washington, DC 20585
Materials Challenges in Alternative and Renewable Energy
Cocoa Beach, FL
February 22, 2010
• Why do we need better hydrogen storage?
• Physical storage technologies
– Liquid
– Compressed
– Cryo-compressed
• Materials-based storage technologies
– Hydrogen sorbents
– Metal hydrides
– Complex hydrides
– Chemical hydrogen storage
Doe stetson hydrogen_storage_technologies_tutorial
Selection of amine solvents for CO2 capture from natural gas power plant - presentation by Jiafei Zhang of Imperial College London at the UKCCSRC Natural Gas CCS Network Meeting at GHGT-12, Austin, Texas, October 2014
Oil shale resource is called unconventional oil resources to distinguish them from oil which can be extracted using traditional oil well methods (e.g., conventional oil resources). Most of the world's oil reserves are recorded as unconventional crude oil. Oil shale deposits represent staggering resource figures. Estimates by the U.S. Geological Survey suggest a global resource of 3 trillion (1012) barrels of oil, but reasonable estimates as high as 12 trillion barrels have been made. About half of the resource is located in the western United States. This articles aims to sight some light on the oil shale as the important types of unconventional oil deposits in the earth as well as how much can be economically recovered from oil shale.
Energy generated by using wind, tides, solar, geothermal heat, and biomass including farm and animal waste is known as non-conventional energy. All these sources are renewable or inexhaustible and do not cause environmental pollution. More over they do not require heavy expenditure.
Natural resources that can be replaced and reused by nature are termed renewable. Natural resources that cannot be replaced are termed nonrenewable.
Renewable resources are replaced through natural processes at a rate that is equal to or greater than the rate at which they are used, and depletion is usually not a worry.
Nonrenewable resources are exhaustible and are extracted faster than the rate at which they formed. E.g. Fossil Fuels (coal, oil, natural gas).
Maximizing production in gassy wells produced by electrical submersible pumpi...josesciancalepore
Maximizing production in high gaswells produced with artificial lift systems is one of the greatest challenges operators face daily. The accumulation of gas inside an Electrical Submersible Pump (ESP) creates a condition called “gas locking”, which prevents fluid production and leads to system shutdown. Multiple shutdowns and frequent Gas Locking negatively affect the runlife and profitability of ESP systems. However, the impacts of gas accumulation in ESP applications can be mitigated by implementing intelligent frequency control software included in Variable Speed Drives (VSD’s) specifically designed to control and protect ESP’s.
Australasian Lab managers Conference: Gas Generation Dr Nicole Pendini 2019Nicole Renee Pendini
This presentation focus on on-site Gas Generation for the laboratory space supplying a range of analytical and specialty applications within the lab environment. I will focus on keeping green by preventing weekly cylinder and bulk supply deliveries, that waste energy offsite to generate the gas and petrol to delivery to the laboratory. The overall cost savings vs other methods (ROI < 1.5 years including service) and of course how Laboratory managers can significantly reduce their OHS/E risk with onsite Nitrogen, Hydrogen and Zero Air gas generators.
GE / Texaco Gasifier Feed to a Lurgi Methanol Plant and its Effect on Methano...Gerard B. Hawkins
GE / Texaco Gasifier Feed to a Lurgi Methanol Plant and its Effect on Methanol Production
CONTENTS
0 Methanol Synthesis Introduction
1 Executive Summary
2 Design Basis
2.1.1 Train I Design Basis
2.1.2 Train II Design Basis
2.1.3 Train III Design Basis
2.2 Design Philosophy
2.2.1 Operability Review
2.3 Assumptions
2.4 Train IV Flowsheet
2.4.1 CO2 Removal
3 Discussion
3.1 Natural Gas Consumption Figures
3.1.1 Base Case
3.1.2 Case 1 – Coal Gasification in Service
3.1.3 Case 2 – Coal Gasification in Service – No CO2 Export
3.2 Methanol Production Figures
3.2.1 Base Case
3.2.2 Case 1 – Coal Gasification in Service
3.2.3 Case 2 – Coal Gasification in Service – No CO2 Export
3.3 85% Natural Gas Availability
3.4 100% Natural Gas Availability
3.5 CO2 Emissions
3.5.1 Base Case
3.5.2 Case 1 – Coal Gasification in Service
3.5.3 Case 2 – Coal Gasification in Service – No CO2 Export
3.6 Specific Consumption Figures
3.6.1 Base Case
3.6.2 Case 1 – Coal Gasification and CO2 Import
3.6.3 Case 2 – Coal Gasification and No CO2 Import
3.7 Train IV Synthesis Gas Composition
4 Further Work
5 Conclusion
APPENDIX
Important Stream Data – Material Balance Stream Data
Texaco Gasifier with HP Steam Raising Boiler
CHARACTERISTICS OF COAL
Material Balance Considerations
A recent case study article from Valve World magazine describes how a Denver-based exploration and production company met fugitive emissions targets and substantially reduced costs.
How?
By changing from their pneumatically actuated valves to Series 2200 control valves with Tritex II™ electric actuators.
This article - written by Norriseal-WellMark’s Director of Sales & Marketing Javvad Qasimi and published in the June issue of Valve World magazine - presents all the details.
SYNGAS CONDITIONING UNIT FEASIBILITY CASE STUDY: COAL-TO-LIQUIDSGerard B. Hawkins
SYNGAS CONDITIONING UNIT FEASIBILITY CASE STUDY: COAL-TO-LIQUIDS
Case Study: #0953616GB/H
HT SHIFT REACTOR CATALYST SPECIFICATION
Process Specification
This process duty specification refers to a Syngas Conditioning Unit which utilizes HT Shift reaction technology on a slip stream of raw gas to produce a recombined gas stream with a H2:CO ratio of 1.57:1. This is an important consideration as the Shift reactor is not required to minimize CO at outlet, and this specification refers to the expected performance that can be achieved in a single stage reactor scheme.
The Syngas Conditioning Unit is part of a proposed coal-to-liquids complex in which synthesis gas is produced by gasification of coal for downstream processing in a Fischer Tropsch reactor and Hydrocracker unit.
Hydrogen as a fuel additive to increase the efficiency by reducing the fuel c...jay majmudar
Most of the Automobile industries uses fossil fuels as a prime resource to run the internal combustion engine, from which the power is generated to propel the vehicle. In Present, environmental degradation is a prime concern, and fossil fuels are major reason for causing pollution, also they are on the verge of extinction in mere future. So the present study aims for using hydrogen based internal combustion engine which is equipped with a HHO kit. The kit produces the fresh hydrogen gas using electrolysis process. Engine’s Performance was measured using Dynamometer and the results showed that, considerable increase in the gasoline thermal energy efficiency of the engine, reduction in fuel consumption, reduction in emissions of CO, NOx, was also observed during the experiment.
Hydrogen as a fuel additive to increase the efficiency by reducing the fuel c...
SPE IPTC Poster Gas Hydrate
1. IPTC 13061 Gas Hydrate Problems in Desert of Sultanate of Oman: Experiences and Integrated Inhibition Program Ardian Nengkoda, Abdulla Harthy, Wael Afify Taha, Hendrikus Reerink, Petroleum Development Oman, Alfred Hase, Champion Technology, Lamda Muchjin, Crescent Petroleum, Supranto, Suryo Purwono, Gadjah Mada University Phone: +968-24670501, Fax: +968-24670632, E-mail: ardian.nengkoda@pdo.co.om Abstract Currently, there are more than 10 oil producing station, in both North and South area operation of Petroleum Development Oman, which facing a unique gas hydrate problems. Most of these wells are producing by the support of gas lift. Therefore, it is very important that the gas lift network is kept optimally operating to maintain the intended production. The ambient temperature in Sultanate of Oman desert drops to as low as 5°C during the coldest 3 months in winter, when hydrates form in several gas lift lines. This causes affected wells to cease production and results in unscheduled deferment. So far, the problem was partly controlled by the use of methanol as hydrate inhibitor (a proven method used worldwide to restrict gas hydrate formation), however there are resulted many issues mainly HSE associated with the use of methanol. The main objectives of this project are to look the other chemicals alternative as hydrate inhibitor – move from methanol to another cost effective and safe chemical inhibitor and the goal is to ensure that the system is adequately inhibited against hydrate formation and that inhibitor injection is optimized. The second goal is to develop a warning system should hydrate start to form (prior to hydrate build up and pipeline blockage). The paper also defines laboratory testing as mandatory requirement to test an alternative hydrate inhibitor and practical facilities up grade. 7-9 December 2009, Doha, Qatar X-58 X-48 X-9 X-14 Moderate hydrate (1 or 2 times g/l flow stop – white line) Worse hydrate (erratic flow of g/l-white color) Before and after heat tracing installation Chemical Injection Current Operation Hydrate Envelope without Methanol and With Methanol Injection Three Cavities in Gas Hydrates Schematic of a hydrate autoclave
2. Conclusions and Project Plans The results of the autoclave tests are presented in Figures 8 and 9, and are summarised below. Dose rates of the kinetic hydrate inhibitor and thermodynamic inhibitor are based on produced water volume scenario. For gas compositions X Field as Table 2, two blank tests were performed each using DI water only (no KHI, Corrosion Inhibitor or a thermodynamic inhibitor). The induction time tH (which is the duration from start until the point where hydrates starts to form indicated by a pressure drop) was recorded as being approximately 2 hours. First tests have been performed with KHI on its own to check which KHI is showing the best performance for this application. Relatively fast it was noticed that even at higher KHI dose rates the obtained induction times were relatively short, less than 12hours. Therefore it has been decided to add MEG as a thermodynamic inhibitor to reduce the sub cooling further into a region, where the KHI can protect the system longer against hydrate formation. The dose rate for the kinetic hydrate inhibitor and the thermodynamic inhibitor MEG are based on produced water. Results obtained with 15% and 17.5% MEG (vol.%) showed no improvement in the performance of the KHI at 3.0%. The threshold level was obviously achieved when 20% MEG was added to test runs. At that MEG concentration the induction times was increased to over 40 hours at a constant dose rate of 30000ppm KHI. With 20vol.% (22.2wt.%) MEG the hydrate equilibrium temperature was dropped to 15°C at 58bar, which leads to a sub cooling of ~10°C. Due to the fact that the sub cooling has been lowered by the injection of 20% MEG, further tests have been performance in order to check whether it is possible to achieve a further reduction in the KHI dose rate. Autoclave tests at 22500ppm didn’t improve the KHI performance, but at 25000ppm the determined induction time was 59 and greater than 72hours (test was stopped) respectively. Based on these results the optimal performance of the KHI has been achieved in lab tests at 2.5% dose rate in the presence of 20% MEG and 20ppm Corrosion Inhibitor as Figure 9. For a shorter protection time against hydrate formation less KHI might be required. A programme of laboratory tests under PDO X Fied conditions showed that: - The addition of MEG is required in order to achieve a reasonable performance of the KHI - The additional amount of MEG was 20% for the X Field gas, the percentages are based on produced water at gas lift line. - No significant impact of the Corrosion Inhibitor has been observed during the lab test and further field testing will be conducted to reflect laboratory testing - Hydrate formation is a very expensive problem faced by the oil and gas industry, which must be solved in an economically and environmentally appropriate manner. IPTC 13061 7-9 December 2009, Doha, Qatar Before increase injection rate after increase injection rate Increasing flow rate of gas lift through the well give slight effect to duration of hydrate formation at control valve (light blue line) Fig. 8 Blank Test Result Fig. 9 Result KHI Optimization