Different Methods of Gas Dehydration -Compared Analysis on Real Casuistry

2017 ◽  
Vol 68 (9) ◽  
pp. 2117-2121
Author(s):  
Dan Paul Stefanescu
Keyword(s):  
Natural Gas ◽  
Water Vapour ◽  
Gas Production ◽  
Dew Point ◽  
Water Vapour Content ◽  
Quality Requirements ◽  
Maximum Value ◽  
Production Areas ◽  
Proper Performance

In order to be transported and used under secure conditions, the natural gas must meet a set of quality requirements that also include a maximum value of the dew point for water from the commercial delivery/pickup point. This assumes the treatment of natural gas in order to reduce the water vapour content, using dedicated equipment, named gas drying or dehydration stations. The materials or substances used for gas dehydration, on an industrial scale and for many years, in the natural gas production areas, are part both of the adsorbent substances category as well as of the absorbent substances category. The paper presents the theoretical and practical aspects regarding the determination of gas humidity and a synthesis of the real casuistry related to exploration of gas dehydration stations by underlining the problems concerning the proper performance of these stations.

Modeling Condensate Banking Mitigation by Enhanced Gas Recovery Methods

2021 ◽  
Author(s):  
Adel Mohsin ◽  
Abdul Salam Abd ◽  
Ahmad Abushaikha
Keyword(s):  
Natural Gas ◽  
Finite Difference ◽  
Positive Impact ◽  
Enhanced Recovery ◽  
Gas Production ◽  
Dew Point ◽  
Productivity Index ◽  
Base Case ◽  
Enhanced Gas Recovery ◽  
Gas Recovery

Abstract Condensate banking in natural gas reservoirs can hinder the productivity of production wells dramatically due to the multiphase flow behaviour around the wellbore. This phenomenon takes place when the reservoir pressure drops below the dew point pressure. In this work, we model this occurrence and investigate how the injection of CO2 can enhance the well productivity using novel discretization and linearization schemes such as mimetic finite difference and operator-based linearization from an in-house built compositional reservoir simulator. The injection of CO2 as an enhanced recovery technique is chosen to assess its value as a potential remedy to reduce carbon emissions associated with natural gas production. First, we model a base case with a single producer where we show the deposition of condensate banking around the well and the decline of pressure and production with time. In another case, we inject CO2 into the reservoir as an enhanced gas recovery mechanism. In both cases, we use fully tensor permeability and unstructured tetrahedral grids using mimetic finite difference (MFD) method. The results of the simulation show that the gas and condensate production rates drop after a certain production plateau, specifically the drop in the condensate rate by up to 46%. The introduction of a CO2 injector yields a positive impact on the productivity and pressure decline of the well, delaying the plateau by up to 1.5 years. It also improves the productivity index by above 35% on both the gas and condensate performance, thus reducing production rate loss on both gas and condensate by over 8% and the pressure, while in terms of pressure and drawdown, an improvement of 2.9 to 19.6% is observed per year.

Corporations

2020 ◽  
pp. 151-182
Author(s):  
Danny M. Adkison ◽  
Lisa McNair Palmer
Keyword(s):  
Natural Gas ◽  
Gas Production ◽  
Economic Life ◽  
Regulatory Control ◽  
Natural Gas Production ◽  
Motor Carriers ◽  
Cotton Gins ◽  
Oil And Natural Gas ◽  
Water Companies

This chapter examines Article IX of the Oklahoma constitution, which concerns the powers, limits, and regulation of corporations. The prodigious length of the article reflects the importance of corporations in the economic life of Oklahoma, and the determination of the framers to bring them under regulatory control, to the point of micromanagement. Concern about discriminatory rates charged by railroads and pipelines was foremost, but the authority conferred by Article IX is broad enough to allow the legislature to regulate a variety of other enterprises as well, including electric, gas, and water companies; oil and natural gas production; and conservation, cotton gins, motor carriers, telephone and telegraph lines; and even ice plants. The framers borrowed freely from the constitutions and statutes of other states—especially the Virginia constitution, the Texas constitution, and the Texas Railway Act—as models for Article IX. Whole sections were often copied verbatim. Moreover, often competing strains of waning Populism and rising Progressivism of the early 1900s pervade this article.

scholarly journals Application of Supergravity Technology in a TEG Dehydration Process for Offshore Platforms

Processes ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 43 ◽  
Author(s):  
Hongfang Lu ◽  
Guoguang Ma ◽  
Mohammadamin Azimi ◽  
Lingdi Fu
Keyword(s):  
Natural Gas ◽  
Flow Rate ◽  
Packed Bed ◽  
Gas Production ◽  
Dew Point ◽  
Transfer Model ◽  
Offshore Platforms ◽  
Dehydration Process ◽  
Tower Equipment ◽  
Rotating Packed Bed

In the dehydration process of offshore natural gas production, due to the site limitation of the platform, if the conventional triethylene glycol (TEG) dehydration process is employed, the size of the absorption tower is usually small. However, in the case of fluctuations in raw material gas and large gas production, it is easy to cause a large loss of TEG and a flooding event, resulting in the water dew point of natural gas not meeting the requirements. Therefore, combined with the dehydration process of TEG and supergravity technology, a new dehydration process of natural gas suitable for offshore platforms is proposed in this paper. The principle and process of the TEG dehydration process based on supergravity technology are discussed by establishing a mass transfer model. The laboratory experiment of the new process is carried out, and the effects of TEG flow rate, super-gravity packed bed rotation speed, and gas flow rate on the air dew point are obtained. By studying the dewatering balance of the rotating packed bed in the improved process, it is proved that the dewatering performance of the high gravity machine (Higee) is much better than that of the ordinary tower dewatering equipment. Through field experiments, the dewatering effect of continuous operation and sudden changes in working conditions is obtained, indicating that the Higee can completely replace the traditional tower equipment for natural gas dehydration.

Analysis of Natural Gas Production in Pre-Salt via Pipelines with MEG and Onshore Processing

2016 ◽  
Vol 830 ◽  
pp. 85-92 ◽  
Author(s):  
Jéssica dos Santos Cruz de Almeida ◽  
José Luiz de Medeiros ◽  
Ofélia Queiroz Fernandes de Araújo
Keyword(s):  
Carbon Dioxide ◽  
Natural Gas ◽  
Gas Production ◽  
Gas Oil ◽  
Natural Gas Production ◽  
Deep Waters ◽  
Production Areas ◽  
Subsea Pipelines

The exploration of pre-salt introduces challenges beyond those posed by ultra-deep waters and the thick of carbonaceous reservoirs. Among the main difficulties are the high gas-oil ratio and the high content of carbon dioxide (CO2) present in the gas. This paper proposes an alternative to the technology currently used in the exploration of pre-salt, in which the gas is treated on the platform. The proposed alternative is applicable to reservoirs which CO2 concentration in gas is greater than 50%, like Jupiter that contains 79% of CO2. For this scenario is suggested that exploration occurs in three production areas: subsea, offshore and onshore. The proposed technology includes the construction of three subsea pipelines: one for the transportation of untreated gas (that is treated onshore); a second for the return of the recovered hydrate inhibitor (in order to be re-injected into the gas pipe) and the last for the return of the carbon dioxide stream separated from the gas.

Statistical Determination of Natural Gas Superheat Requirements

2002 ◽  
Author(s):  
Colin Wilkes
Keyword(s):  
Natural Gas ◽  
General Equation ◽  
Temperature Drop ◽  
Dew Point ◽  
Gas Composition ◽  
Control Valves ◽  
Temperature Loss ◽  
Condensate Formation ◽  
Statistical Determination

The ASME Fuel Specification B133.7M [1] states that a typical margin of 25 to 30° C (45 to 54° F) of superheat is used for natural gas fuel but offers no basis for the estimate. The purpose of this paper is to propose a method for the safe determination of superheat that is less conservative, yet will meet the six sigma requirement of less than 4 defects (condensate formation) in one million opportunities. A drop in the total temperature of natural gas will be experienced as the gas expands in pressure reducing stations and across control valves. If the temperature falls below the hydrocarbon or moisture dew point, condensation will take place and liquids will collect or will be entrained with the gas. The temperature drop is inversely proportional to the pressure drop and is often termed ‘Joule-Thomson cooling’ or ‘J-T cooling’. The rate of cooling is described by the Joule-Thomson coefficient that can be determined by experiment or calculated from the gas composition. Superheating the gas prior to expansion can prevent condensation. The degree of superheat required for hydrocarbons, however, is often greater than the expected temperature loss across the valve as the hydrocarbon dew point may increase as the pressure falls. This paper describes a method for determining the quantity of superheat required for a specific gas composition and develops a general equation in terms of gas supply pressure that will satisfy the needs for the majority of natural gases. The general equation is based on the statistical analysis of superheat requirements for over 230 natural and liquefied natural gas compositions. A similar equation is also presented that describes the superheat requirements to avoid moisture condensation. The two equations can be used to specify the heating requirements upstream of pressure reducing stations or control valves.

scholarly journals III. Report on hygrometric methods. First part, including the saturation method and the chemical method, and dew-point instruments

1888 ◽  
Vol 43 (258-265) ◽  
pp. 333-336
Keyword(s):  
Water Vapour ◽  
Chemical Method ◽  
Dew Point ◽  
Saturation Method ◽  
Work Done

With the exception of certain “absolute hygrometers,” the behaviour of which has not yet been sufficiently tested, the determination of the pressure of water-vapour in the air is indirect and requires a formula of reduction. The formulæ in use are based upon assumptions which are at present not so completely verified by experiment that any hygrometric method can be relied upon to give measures of the pressure of aqueous vapour trustworthy to within 0·1 mm. of mercury. The authority for these statements is given in detail in an account of the hygrometric work done since 1830. This account is appended to the report as Note A.

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