Abstract
The ultra-deep oil and gas are a promising exploration direction in petroleum industry recently. The geochemical feature of natural gas in four various fault zones were analyzed, and found that the natural gas is oil associated gas in the North Shuntuoguole area (Shunbei area), Tarim Basin. K1 and K2 values are used to judge the source of oil and gas. They are only associated with the parent material type of oil and gas, but not to the maturity. The changing trends of the K1 and K2 values are basically the same, indicating that the natural gas in the Shunbei comes from the same oil and gas system. Through the analysis of drilling data, showing that different fault zones have different hydrocarbon enrichment laws, and the same fault zone has different hydrocarbon enrichment laws at different locations. It provides a new insight for future exploration in study area and has reference significance for ultra-deep oil and gas exploration at home and abroad.
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