13 Sep, 2021

Onshore Gas Gathering Systems – Concept Selection, Basic Design & Operation (Part 3)

There are several “non-metallic” options for gas gathering system applications. To a large degree, non-metallics eliminate the corrosion concerns – both internal and external – associated with metallic – typically carbon steel – pipelines.

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1 Sep, 2021

Acid Gas Removal: Preventing Liquid Carry Over to and Condensation in the Amine Contactor

Hydrogen sulfide and carbon dioxide are the principal objectionable acid gas components often present in natural gas, synthetic gas, and various refinery gas streams. These acid gas components must be removed for corrosion prevention in gas pipelines, process equipment, and for health and safety reasons. Reference [1] provides current acceptable concentration levels for these acid gases in various gas streams. Hydrogen sulfide removal often requires the production of sulfur in the sulfur recovery units to meet emission limits. Sulfur is a product used to produce sulfuric acid and fertilizers. Carbon dioxide removal is used for enhanced oil recovery and is required for carbon capture and sequestering (CCS) operations.

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30 Aug, 2021

Onshore Gas Gathering Systems – Concept Selection, Basic Design & Operation (Part 2)

In some cases, a choke/line heater is required at the wellsite to deal with the large JT expansion cooling effect experienced by choked high-pressure wells, especially during start-up. This is a somewhat different application than prevention of hydrates in the GGS but there are some common aspects to the equipment utilized. First, the hydrate temperature of the flowing wellstream is estimated. From Figure 1, for 0.65 SG gas and assuming any free water present is condensed/fresh water, the estimated hydrate temp at an assumed average GGS pressure of 1,100 psig is ~ 65 F.

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24 Aug, 2021

Onshore Gas Gathering Systems – Concept Selection, Basic Design & Operation (Part 1)

Part 1 : Shale gas is typically considered an “unconventional” resource, along with tight gas and coalbed methane. Of these three, coalbed methane (CBM) has several characteristics that make it quite different than shale gas and tight gas, including: shallow depth, low pressure and temperature, and the need for a significant early life “de-watering” stage. As a result, CBM developments have some considerably different aspects to them and will not be discussed further in this article.

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18 Aug, 2021

GNL/ Plantas de Gas: Problemas y Soluciones

Existen tres unidades claves de procesamiento, vis. Unidad de Remoción del Gas Acido (AGRU/URGA), Unidad de Deshidratación por Tamices Moleculares (MSDU/UTMD), y la Unidad de Remoción de Mercurio (MRU/URM) que son comunes tanto en el procesamiento del gas, así como facilidades del GNL. En este Previo del Mes (PDM), se analizaran algunos problemas operacionales asociados con estas unidades de proceso, y las acciones de solución en sitio (troubleshooting) de estas circunstancias operacionales. La clave para lograr una operación exitosa de estas unidades es el entendimiento de los parámetros que ocasionan la problemática operacional y como detectar estos en la fase de diseño del proyecto.

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