What do rich gas and dry gas refer to respectively? Please advise

Dry gas is separated from liquefied gas and then absorbed by diesel to remove the heavier components from it.

Petroleum gases are generally classified into three categories based on the content of heavy gases such as those with three or more carbon atoms: Gases with a content of heavy gases like those with three or more carbon atoms of 150 grams per cubic meter or more are referred to as rich gases. Gas with a content of less than 50 grams/m3 is called dry gas. A content of 50–150 grams/m3 is referred to as lean gas.

I. Agree with the view from Floor 3; these terms have clear definitions in the basic concepts of oil field development. However, in SY/T0049-2006 \"Design and Planning for Onshore Oil and Gas Field Facilities\", sections 3.44–3.45 define them as follows: 1. Moist gas: Natural gas in which the amount of pentane and heavier hydrocarbon components per cubic meter, calculated in liquid form, is greater than 10 mL. 2. Dry gas: Natural gas in which the volume of pentane and heavier hydrocarbon components, expressed in liquid form, is less than 10 mL per cubic meter of gas. In the textbook \"Oil and Gas Gathering, Transportation, and Field Processing\": 1. Wet gas: gas-oil ratio greater than 8905 M3/M3; 2. Dry gas: natural gas free of liquids. II. Based on the volume of liquid that can be recovered from 1 m³ of natural gas at 1 atmosphere pressure and 15 degrees Celsius, natural gas is classified into lean gas, rich gas, and very rich gas. If ethane and components heavier than ethane (C2+) are considered as recoverable liquids, then: lean gas < 0.3344 L/m³ ； The rich gas volume is 0.3344~0.6688 L/m³ ； Extreme gas density > 0.6688 L/m³. (Excerpt from \"Oil and Gas Gathering, Transportation, and Field Processing\") Based on the content of components in natural gas above propane (also known as heavier hydrocarbons), it is divided into dry gas and wet gas. Dry gas, also known as lean gas, is primarily composed of methane, contains only a small amount of ethane, and has no or only a trace amount of heavier alkanes. Moist gas, also known as rich gas or fatty gas, is primarily composed of methane and ethane, but it also contains a considerable amount of liquid heavy hydrocarbons. Those with a heavy hydrocarbon content of ≥5% are referred to as wet gas or rich gas ； Gas with a heavy hydrocarbon content of <5% is called dry gas or lean gas.