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Advanced Natural Gas Engineering by Xiuli Wang

By Xiuli Wang

The position of common gasoline in assembly the realm power call for has been expanding due to its abundance, versatility, and fresh burning nature. for that reason, new gasoline exploration, box improvement, and creation actions are less than means. this is often very true in areas the place traditional fuel used to be (until lately) labelled as 'stranded'. simply because a good portion of traditional fuel reserves world-wide can be found throughout our bodies of water, fuel transportation turns into a subject. we're facing many detailed matters and dealing with many demanding situations within the complete 'food chain' (upstream to midstream and downstream) of average gasoline engineering. This necessitates a bridge of the know-how gaps in a couple of vital parts: the original new applied sciences similar to diverse interpretation of 3-D seismic in usual fuel exploration; the categorical specifications in gasoline good drilling; the necessity for the hydraulically fracturing of excessive permeability fuel good to avoid the wear yet most significantly to lessen turbulence as a result of excessive good deliverability; usual gasoline sea-going transportation corresponding to liquefied traditional gasoline (LNG) and compressed usual fuel (CNG); fuel conversion and garage; and, replacement and competing strength resources. All of those new concerns and demanding situations haven't been addressed intensive in any current books. one more reason why we placed this publication jointly is predicated on our observations of younger execs and graduate scholars. With the ability of present computing know-how, many businesses are delivering diverse software program to unravel engineering difficulties. Many younger engineers and scholars are sturdy at operating courses and plotting appealing graphs with no realizing what the numbers and figures suggest. someway humans have misplaced their basic talents to take on difficulties with no utilizing a working laptop or computer. right here, along with addressing the complex engineering matters relating to ordinary fuel, we additionally offer equations in addition to examples and targeted calculation approaches of basic chemical and petroleum engineering difficulties. This booklet can function a reference e-book for all engineers within the strength enterprise in addition to a textbook for college students in petroleum and chemical engineering curricula and within the education departments of a big team of businesses.

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1990). The range of validity will be the same as Z-factor. 7 Units and Conversions We have used “oilfield” units throughout the text, even though this system of units is inherently inconsistent. We chose this system because more petroleum engineers “think” in Mscf/d (thousand standard cubic feet per day) for gas rate and psi for pressure than in terms of m3/s (cubic meter per second) and Pa. All equations presented include the constant or constants needed with oilfield units. To employ these equations with SI units, it will be easier to first convert the SI units to oilfield units, calculate the desired results in oilfield units, and then convert the results to SI units.

001. Solution OPTION 1—Calculate the pseudocritical properties of the mixture. These properties are simply the summation of the individual contributions of the component gases, weighted by their molar fractions. This is based on the classical thermodynamics law for ideal mixtures and Dalton’s law of partial pressures. Table 1–3 gives the results of this calculation. 02 1 * Use the properties of n-octane. 69. 855. Then, from Eq. 34 ft 3 . 4, 000 OPTION 2—Obtain ppc and Tpc from gas specific gravity.

51) = 4,412. It requires trial and error but using the same Tpr curve. For each assumed pressure the ppr must be calculated, then a Z must be obtained and the ratio p/Z must be checked against 18 Chapter 1 Natural Gas Basics the 4,412 value. 59. Example 1–3 Calculation of gas reservoir volume Use the real gas law to calculate the volume of 5 lb-mol of a gas mixture at reservoir conditions of T = 180°F and p = 4,000 psi. 001. Solution OPTION 1—Calculate the pseudocritical properties of the mixture.

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