摘要
The Mazhuang gas reservoir is located in the eastern part of the Junggar Basin. Itsgas-producing pool is averagely 2000 m deep. It is a mid-shallow reservoir. The natural gasrich 2--7% of C<sub>2</sub>-C<sub>4</sub> gaseous hydrocarbons is mainly composed of methane. δ<sup>13</sup>C<sub>CH<sub>4</sub></sub>. valuesare--47----45‰, heavier than microbiogenic gas, and lighter than coal--type gas as well asoil--associated gas. The maternal materials of gas source rocks are primarily from the type-Ⅲ organic matter at the low--mature stage （0.5%【R<sub>0</sub>≤0.8%）. The discovery of the reservoiris of great significance not only to the further exploration of natural gas but also to theenrichment of the gas--forming theory and the perfection of the classification of natural gastypes.
The Mazhuang gas reservoir is located in the eastern part of the Junggar Basin. Its
gas-producing pool is averagely 2000 m deep. It is a mid-shallow reservoir. The natural gas
rich 2--7% of C_2-C_4 gaseous hydrocarbons is mainly composed of methane. δ^(13)C_(CH_4). values
are--47----45‰, heavier than microbiogenic gas, and lighter than coal--type gas as well as
oil--associated gas. The maternal materials of gas source rocks are primarily from the type-
Ⅲ organic matter at the low--mature stage (0.5%<R_0≤0.8%). The discovery of the reservoir
is of great significance not only to the further exploration of natural gas but also to the
enrichment of the gas--forming theory and the perfection of the classification of natural gas
types.
基金
Project supported by the National Natural Science Foundation of China.
