Dew-Point Curves of Natural Gas. Measurement and Modeling

2006 ◽  
Vol 45 (14) ◽  
pp. 5179-5184 ◽  
Author(s):  
S. Avila ◽  
A. Benito ◽  
C. Berro ◽  
S. T. Blanco ◽  
S. Otín ◽  
...  
Keyword(s):  
Natural Gas ◽  
Dew Point ◽  
Gas Measurement

H2 in an Existing Natural Gas Pipeline

2020 ◽  
Author(s):  
O. J. C. Huising ◽  
A. H. M. Krom
Keyword(s):  
Natural Gas ◽  
Dew Point ◽  
Chemical Agent ◽  
Process Safety ◽  
Personal Safety ◽  
Natural Gas Pipeline ◽  
Safety Work ◽  
Gas Measurement ◽  
Natural Gas Transport ◽  
Management Issues

Abstract N.V. Nederlandse Gasunie (Gasunie) has converted an existing gas transmission line from transporting natural gas to transporting a mixture of gaseous hydrogen and 30% to 0% methane. To enable this, an assessment was carried out on technical safety, process safety, work safety and external safety. The pipeline, with two valve stations, was constructed in 1996 according to applicable Dutch regulations and actively managed in accordance with Gasunie company standards. The pipeline was evaluated for hydrogen transportation and, based on the following measures, this was seen as being feasible: - The water dew point of the feed must not exceed −8° C; - The pipeline must be separated from the natural gas transport system; - Blowdown must be performed either at the site of the supplier or the user of the hydrogen; - Gas measurement equipment, personal safety and leak detection must be suitable for hydrogen; - Due to the assignment of hydrogen as a chemical agent, the safety contour was reduced by performing extra measures, such as additional communication to landowners, additional requirements for the pressure-regulating system and verification of additional settlement and stresses. The operational changes consist of a number of maintenance and management issues: • In-service welding and hot tapping are not allowed; • Equipment suitable for use in gas group IIC (ATEX) must be used; • Emergency and maintenance procedures must be updated to those applicable for pipeline and valve stations containing hydrogen.

scholarly journals Discussion on Water Dew Point and Hydrocarbon Dew Point of Natural Gas

2021 ◽  
Vol 651 (3) ◽  
pp. 032090
Author(s):  
Xiaomei Zou ◽  
Fengxia Huang ◽  
Liming Zhang ◽  
Tumeng Gele
Keyword(s):  
Natural Gas ◽  
Dew Point

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.

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.

Measurement and prediction of dew point curves of natural gas mixtures

2012 ◽  
Vol 334 ◽  
pp. 1-9 ◽  
Author(s):  
Vasiliki Louli ◽  
Georgia Pappa ◽  
Christos Boukouvalas ◽  
Stathis Skouras ◽  
Even Solbraa ◽  
...  
Keyword(s):  
Natural Gas ◽  
Gas Mixtures ◽  
Dew Point
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