petroleum gas field processing

[...]... pressure: 10 psig (4–5 psi RVP) II FIELD PROCESSING OF NATURAL GAS Nature gas associated with oil production (associated gas) or produced from gas fields generally contains undesirable components such as H2S, CO2, N2, and water vapor Field processing of natural gas implies the removal of such undesirable components before the gas can be sold in the market Specifically, the gas contents of H2S, CO2, and... Field processing of natural gas, in general, is carried out for two main reasons: 1 2 The necessity to remove impurities from the gas The desirability of increasing liquid product recovery above that obtained by conventional gas processing Gas field processing units usually include the following: 1 2 Removal of water vapor: Gas dehydration represents the most common needed unit in gas field processing. ..Part IV: Field Processing and Treatment of Natural Gas Chapter 10 Overview of Gas Field Processing Chapter 11 Sour Gas Treating Chapter 12 Gas Dehydration Chapter 13 Recovery, Separation, and Fractionation of Natural Gas Liquids Copyright 2003 by Marcel Dekker, Inc All Rights Reserved Introduction Fluids produced from oil and gas wells genrerally constitute mixtures of crude oil, natural gas, and... master gas system (MGS), as illustrated in Fig 2, is a good example Nonassociated gases, including gas condensates, are also a potential source of hydrocarbons for many oil-producing countries The processing of the gas condensates, however, involves a low-temperature technique to be described later in the text Copyright 2003 by Marcel Dekker, Inc All Rights Reserved Figure 2 Master gas system (MGS) Field. .. reservoirs have free gas existing as a gas cap above the oil The formation of this gas cap was due to the presence of a larger amount of gas than could be dissolved in the oil at the pressure and temperature of the reservoir The excess gas is segregated by gravity to occupy the top portion of the reservoir In such a reservoirs, the oil is produced by the expansion of the gas in the gas cap, which pushes... most cases, however, solution gas is also contributing to the drive of the oil out of the formation Under favorable conditions, some of the solution gas may move upward into the gas cap and, thus, enlarge the gas cap and conserves its energy Reservoirs produced by the expansion of the gas cap are known as Gas- cap-drive reservoirs This drive is more efficient than the solution -gas drive and could yield... customer and are safe to handle I CRUDE OIL PROCESSING Crude oil gas water mixtures produced from wells are generally directed, through flow lines and mainfold system, to a central processing and treatment facility normally called the gas oil separation plant (GOSP) The first step in processing of the produced stream is the separation of the phases (oil, gas, and water) into separte streams This takes... justifiable Gas compression is usually needed after these treatment processes In addition, the gas undergoes separation and fractionation for the recovery of some hydrocarbon components that are utilized as a feedstock for the petrochemical industry Several schemes can be recommended for field processing and separation of natural gas, but the specific solution is usually a function of the composition of the gas. .. devices known as two-phase gas oil separators when the produced stream contains no water or three-phase separators when the produced stream contains water Gas oil separation carried out in these separators is recognized as the backbone process in a train of field processing units of oil and gas operations The separators are used to relieve the excess pressure due to the gas associated with the produced... oil /gas occupying only a small portion of the formation In such cases, the vast formation below the oil /gas is saturated with salt water at very high pressure When oil /gas is produced, by lowering the pressure in the well opposite the petroleum formation, the salt water expands and moves upward, pushing the oil /gas out of the formation and occupying the pore spaces vacated by the produced oil /gas The . conventional gas processing Gas field processing units usually include the following: 1. Removal of water vapor: Gas dehydration represents the most common needed unit in gas field processing. . ppm Vapor pressure: 10 psig (4–5 psi RVP) II. FIELD PROCESSING OF NATURAL GAS Nature gas associated with oil production (associated gas) or produced from gas fields generally contains undesirable components. Gas Chapter 10. Overview of Gas Field Processing Chapter 11. Sour Gas Treating Chapter 12. Gas Dehydration Chapter 13. Recovery, Separation, and Fractionation of Natural Gas Liquids Copyright 2003