摘要
黄骅拗陷具有多种天然气资源。本文重点讨论了区内天然气的地质特征及其成因类型。对纯天然气、气顶气、伴生气、凝析气和CO2气等五种气藏的特征和成因进行了探讨,认为既有有机成因气,也有无机成因气及二者的混合气,其中有机成因的烃类气可分为生物气、浅层混合气、热成气和深层混合气等四种成因类型。
Abstract
The natural gases of Huanghua Depression are derived from various sources. On the basis of the geological characters of the natural gases in the studied area, the occurrence and the compositional features of the gas-pays and their associative relationship to crude oil are studied. The natural gases can be classified into five types, i.e. pure natural gas, gas-top gas, associated gas, condensate gas, and CO2 gas. Based on the composition, dryness, and the features of carbon isotopic composition, the origins of the natural gas in the area have been analyzed. The hydrocarbon gases can be divided into biogenic gas, near-surface mixed gas, thermogenic gas and deep source mixed gas. The non-hydrocarbon gases can be classified into deep-sourced gas and thermogenic gas or/and the mixed gas.
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