Comparative Analysis of Selected Models of Water Coning in Gas Reservoirs / Analiza Porównawcza Wybranych Modeli Powstawania Stożków Wodnych w Złożach Gazowych

2012 ◽  
Vol 57 (2) ◽  
pp. 451-470
Author(s):  
Rafał Smulski
Keyword(s):  
Comparative Analysis ◽  
Natural Gas ◽  
Gas Flow ◽  
Oil Fields ◽  
Gas Reservoirs ◽  
Critical Rate ◽  
Water Coning ◽  
Modified Formula ◽  
Gas Fields ◽  
Turbulent Gas Flow

Abstract Exploitation of natural gas fields with edge or underlying water is usually defined per analogy to the oil fields. The existing models do not correspond to reality as they do not describe relevant processes related with a turbulent gas flow near the well. The natural gas exploitation with productivity greater than critical may be advantageous in view of summaric depletion and rate of depletion. Article presents: the analysis of the selected critical rates models, determining the influence of specific parameters on the critical rate values, introducing new modified formula for critical rates, and comparative calculations for various configurations with the numerical model.

FEATURES OF FLOW AND HEAT TRANSFER IN THE INNER CAVITY OF THE FLAME STABILIZER IN THE PRESENCE AND ABSENCE OF NICHES ON ITS SIDE SURFACES

2018 ◽  
Author(s):  
Nataliia Fialko ◽  
◽  
Julii Sherenkovskiy ◽  
Nataliia Meranova ◽  
Serhii Aloshko ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Comparative Analysis ◽  
Natural Gas ◽  
Gas Flow ◽  
Type A ◽  
Flow And Heat Transfer ◽  
Presence And Absence ◽  
Stabilizer Type ◽  
Natural Gas Flow

For microjet burners of the stabilizer type, a study of the regularities of the natural gas flow in the inner cavity of the flame stabilizer has been carried out. A comparative analysis of the features of heat transfer from the inner surfaces of the stabilizer walls is carried out for two variants of its configuration: flat and in the presence of trapezoidal niches on its lateral surfaces.

Innovative Approach to the Mercury Control During Natural Gas Processing

2001 ◽  
Author(s):  
Zdravko Spiric
Keyword(s):  
Natural Gas ◽  
Gas Flow ◽  
Flow Direction ◽  
Harmful Effect ◽  
Fixed Bed ◽  
Innovative Approach ◽  
Process Efficiency ◽  
Gas Processing ◽  
Mercury Control ◽  
Gas Fields

Abstract Natural gas, being produced from gas fields around the globe, along with a large number of other harmful substances (CO2, H2S, RSH, COS, etc.), often contains mercury. Mercury’s potentially harmful effect on humans and on the ecological system as a whole as well as the risk regarding mercury’s corrosive effects to the very sophisticated and expensive process material, equipment and catalysts is making its removal an imperative. The frequently applied procedure to remove mercury as an impurity and environment pollutant from process streams utilizes adsorption on a fixed bed consisting of sulfur impregnated activated carbon. This paper deals with data, results and more than seven years of practical field experience obtained by research of mercury removal unit efficiency during production and enhancement of natural gas at Molve, Croatia. Paper details the operating implications of handling and processing natural gas containing mercury, showing the results of the innovative approach in the process control, resulting in safety reliability and process efficiency improvements by plant modification due to change of gas flow direction.

Development of Natural Gas Liquefaction FPSO

2004 ◽  
Author(s):  
Sotaro Masanobu ◽  
Shunji Kato ◽  
Arata Nakamura ◽  
Takashi Sakamoto ◽  
Toshio Yoshikawa ◽  
...  
Keyword(s):  
Natural Gas ◽  
Water Depth ◽  
Gas Reservoirs ◽  
Natural Gas Liquefaction ◽  
Private Corporations ◽  
Gas Fields

Natural gas is abundant and is cleaner than petroleum. Therefore, demand for natural gas is expected to grow significantly. However, the means of transporting natural gas is presently limited to pipelines and LNG tankers, thereby making its wider use unlikely. There are substantial numbers of known gas reservoirs that are difficult to develop utilizing current transportation means because of constraints such as the scale of gas fields, water depth, distance to shore, and distance from markets. A new, economical, reliable development technique or transportation means is required for developing such gas reservoirs. Ministry of Economy, Trade and Industry (METI), Japan National Oil Corporation (JNOC) and private corporations have jointly investigated the Natural Gas Liquefaction Floating Production, Storage and Offloading (NGL-FPSOs) units to effectively develop gas reservoirs by converting the gas into NGL. This paper presents the background on NGL-FPSO development and findings on its application.

Comparative analysis of separation technologies for processing carbon dioxide rich natural gas in ultra-deepwater oil fields

2017 ◽  
Vol 155 ◽  
pp. 12-22 ◽  
Author(s):  
Ofélia de Queiroz Fernandes Araújo ◽  
Alessandra de Carvalho Reis ◽  
José Luiz de Medeiros ◽  
Jailton Ferreira do Nascimento ◽  
Wilson Mantovani Grava ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Comparative Analysis ◽  
Natural Gas ◽  
Oil Fields

Exergy of natural gas flow in Iran's natural gas fields

2009 ◽  
Vol 6 (1) ◽  
pp. 131 ◽  
Author(s):  
Mahmood Farzaneh Gord ◽  
Mohammad Javad Maghrebi
Keyword(s):  
Natural Gas ◽  
Gas Flow ◽  
Gas Fields ◽  
Natural Gas Flow

scholarly journals Cost Optimization and Flexibility Analysis for the Liquefaction of an Associated Natural Gas Stream

2019 ◽  
Vol 142 (6) ◽  
Author(s):  
Saeed Eini ◽  
Georgios M. Kontogeorgis ◽  
Davood Rashtchian
Keyword(s):  
Natural Gas ◽  
Gas Flow ◽  
Cost Optimization ◽  
Oil Field ◽  
Methane Content ◽  
Oil Fields ◽  
Small Scale ◽  
Associated Gas ◽  
Flexibility Analysis ◽  
Flow Fluctuations

Abstract Liquefaction and then transportation to the market is one of the promising options for the utilization of associated natural gas resources which are produced in oil fields. However, the flow of such resources is normally unsteady. Additionally, the associated gas in one oil field may exhaust in a few years and the liquefaction plant should be moved to another oil field with different specifications. In order to tackle such challenges, liquefaction systems not only must be optimally designed and operated but also should be flexible with respect to the gas flow fluctuations. The flexibility analysis of such processes is usually ignored in the optimization studies. In this research, first, the economic performance of two small-scale liquefaction processes (a single mixed-refrigerant process, SMR, and a nitrogen expander process) was optimized and compared. The results showed that the SMR process is economically more attractive (49% lower lifecycle cost compared to the nitrogen expander process). As a post-optimization step, flexibility analysis was performed to investigate the ability of optimal designs in overcoming gas flow fluctuations. For this purpose, five-thousand feed samples with different flowrate and methane content were supposed which formed a feasibility-check region. The results showed that with respect to the design constraints, the optimal SMR process is more flexible and feasibly operates in the entire region. However, the nitrogen expander process cannot feasibly operate for the gas feed with high flowrate and low methane content.

RECENT EXPLORATION AND PETROLEUM DISCOVERIES IN THE DENISON TROUGH, QUEENSLAND

1983 ◽  
Vol 23 (1) ◽  
pp. 120
Author(s):  
R. S. Brown ◽  
L. G. Elliott ◽  
R. J. Mollah
Keyword(s):  
Gas Flow ◽  
Joint Venture ◽  
Late Triassic ◽  
Lower Permian ◽  
Full Potential ◽  
Gas Reservoirs ◽  
Seismic Surveying ◽  
Gas Market ◽  
Definition Of ◽  
Gas Fields

Four gas fields (Glentulloch, Westgrove, Rolleston and Arcturus) were discovered by AAR Limited in the Denison Trough in the early 1960's. Permian gas reservoirs were encountered in Late Triassic wrench anticlines. The fields were not developed because of low gas prices and exploration technology problems at that time. Exploration activities ceased in 1970.Increased gas prices, the opportunity of an expanded gas market, and improved seismic technology provided the incentive to recommence regional seismic surveying of the basin in 1979. More than 2600 km of multi-fold seismic data have been recorded by the AAR Limited/Oil Company of Australia N.L. Joint Venture. The enhanced seismic resolution resulted in a revision of the structural and stratigraphic interpretation of the basin. Exploration drilling in 1981 was directed initially at deep Early Permian structures; however, reservoir quality of the Lower Permian sequence was poor and gas flow rates minimal.Exploration was therefore redirected towards the definition of prospects which were structurally and stratigraphically similar to the known fields. Five exploration wells have been drilled since November 1981, resulting in the discovery of a further three gas fields — Merivale, Yellowbank and Punchbowl Gully. Appraisal wells were drilled on the Glentulloch, Westgrove, Merivale and Yellowbank Fields, and were cased for future production.It is estimated that nine billion cubic metres (x 109m3) of conventional gas reserves are present within the basin. In addition, tight reservoirs contain large volumes of gas which may be producible by hydraulic fracturing. The basin is being actively explored to realize its full potential and to supply industrial and domestic markets in central and southeastern Queensland.

scholarly journals Case study on diagnosis and identify the degree of bottom hole liquid accumulation in double-branch horizontal wells in PCOC

2021 ◽  
Vol 248 ◽  
pp. 01071
Author(s):  
Tingwei Yao ◽  
Yang Zhang ◽  
Minhao Guo ◽  
Zhilin Tuo ◽  
Haiyang Wang ◽  
...  
Keyword(s):  
Natural Gas ◽  
Large Scale ◽  
Gas Flow ◽  
Continuous Production ◽  
Production Performance ◽  
Gas Wells ◽  
Gas Reservoirs ◽  
Gas Recovery ◽  
Bottom Hole ◽  
Natural Gas Reservoirs

In the process of continuous production of natural gas wells, formation pressure and gas flow rate decrease continuously. The ability to carry liquid decreases continuously, thus gradually forming bottom hole liquid. Bottom hole liquid accumulation is an important reason for the decrease of production or shutdown of natural gas wells. How to diagnose whether there is liquid accumulation in natural gas wells and identify the degree of liquid accumulation, to adopt drainage gas recovery operation in time, is the research focus of efficient development of natural gas reservoirs. In this paper, a method for diagnosing bottom hole liquid accumulation combining production performance curve and modified Fernando inclined well critical liquid-carrying model is designed for a large scale double-branch horizontal well used in unconventional reservoirs. The method is applied to the Well X2 of He 8 Member in PCOC. The application results showed that there was no liquid accumulation in the horizontal and vertical sections of the Well X2. The liquid in the wellbore was generated at the bottom of the inclined section and the liquid accumulation is upward along the wellbore from the bottom of the inclined section, with the height of 3 m.

scholarly journals Current trends in the exploitation of mature gas fields in the context of rehabilitation concept

2019 ◽  
Vol 290 ◽  
pp. 10005
Author(s):  
Diana Lupu
Keyword(s):  
Project Management ◽  
Natural Gas ◽  
Business Performance ◽  
Recovery Factor ◽  
Gas Reservoirs ◽  
Gas Industry ◽  
Current Trends ◽  
Reservoir Development ◽  
Performance Results ◽  
Gas Fields

The exploitation of mature natural gas fields has been and will be an increasingly topic that will attract the attention of the production companies, given that most of the production, about 60-70%, comes from these reservoirs. Implementation of the project management into the exploitation of mature gas reservoirs has a notable ascension because of the fact that in the execution of the operational programs always has developed a mechanism to achieve the objectives in a sustainable manner. The project management in gas industry it is known as rehabilitation concept or integrated reservoir development, which has a major impact on increasing the recovery factor. The paper intends to present the current trends in the exploitation of mature gas fields in Romania by applying the concept of rehabilitation as well as expansion opportunities in order to drive the business performance results.

scholarly journals Storing CO2 in buried volcanoes

2021 ◽  
Vol 61 (2) ◽  
pp. 626
Author(s):  
Simon Holford ◽  
Nick Schofield ◽  
Mark Bunch ◽  
Alan Bischoff ◽  
Ernest Swierczek
Keyword(s):  
Natural Gas ◽  
Oil And Gas ◽  
Chemical Reactivity ◽  
The United States ◽  
High Reactivity ◽  
Gas Reservoirs ◽  
High Co2 ◽  
Permanent Storage ◽  
Mineral Trapping ◽  
Gas Fields

Australia contains rich natural gas resources, but many of Australia’s currently producing and undeveloped gas fields contain relatively high CO2 contents; if not captured and stored, the venting of co-produced CO2 could hinder efforts to meet Australia’s emission reduction targets. The most mature technology for isolating produced CO2 from the atmosphere is by containing it in deep sedimentary formations (e.g. saline aquifers or depleted oil and gas reservoirs). The effectiveness of this approach is dependent on factors such as reservoir capacity, the presence of low-permeability seals that physically impede vertical migration of injected CO2, the chemical reactivity of both reservoir and seal minerals, the risk for leakage, and a gas-entrapping structure. An alternative and attractive mechanism for permanent storage of CO2 is geochemical or mineral trapping, which involves long-term reactions of CO2 with host rocks and the formation of stable carbonate minerals that fill the porosity of the host rock reservoir. Natural mineral carbonation is most efficient in mafic and ultramafic igneous rocks, due to their high reactivity with CO2. Here we review the outcomes from a series of recent pilot projects in Iceland and the United States that have demonstrated high potential for rapid, permanent storage of CO2 in basalt reservoirs, and explore the practicalities of geochemical trapping of CO2 in deeply buried basaltic volcanoes and lava fields, which are found in many basins along the southern (e.g. Gippsland Basin) and northwestern (e.g. Browse Basin) Australian margins, often in close proximity to natural gas fields with high CO2 content.

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