| 摘要 |
A method of treating a gaseous stream from a well in the vicinity of the well head in which the feed stream, after treatment to remove water and acid gas, is subjected to the following stages: i) the feedstream at a pressure in the range 200 to 1500 psia is cooled to a temperature which is equivalent to a temperature in the range -30 DEG F to -100 DEG F at 500 psia to separate a liquid stream (A) and a gas stream (B), ii) the liquid stream (A) is expanded to form a gas stream (C) and a liquid stream (D) at a pressure in the range 15 to 125 psia and at a temperature equivalent to a temperature in the range -140 DEG F to -210 DEG F at atmospheric pressure, the liquid stream (D), which is a product NGL stream comprising a portion of the C2 component of the feedstream and substantially all the C3 heavier components of the feedstream, iii) cooling the gas stream (B) and expanding this stream to produce a liquid natural gas stream (F) at a pressure in the range 15 to 125 psia and at a temperature equivalent to a temperature in the range -240 DEG F to -270 DEG F at atmospheric pressure and optionally also a gas stream (E). <IMAGE>
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