渤海湾盆地CO_2气藏成因探讨

A Discussion on the Geneses of the Carbon Dioxide Pools in Bohai Bay Basin

近年来,在渤海湾盆地的济阳拗陷、黄骅拗陷和冀中拗陷屡屡发现高含CO_2的气藏,该类气藏受区域性深大断层的控制,并在地史上有岩浆侵入和火山活动。气藏以岩石化学成因为主,兼有岩浆(火山)成因。盆地内郯庐大断裂、兰聊大断裂附近和沦县隆起、埕宁隆起的边界大断层附近是寻找CO_2气藏的有利地区。

In recent year, the pools high in carbon dioxide have been repeatedly found in the depressions of Jiyang, Huanghua and Jizhong in Bohai Bay Basin. These pools are controlled by regional deep major faults and had happened with magmatic intrusions and volcanic activities in geologic history. These pools take petrochemistry as main genesis and concurrently magmatic(volcanic)one. The favourable regions for surveying the carbon dioxide pools are near the major faults of Tanlu and Lanliao as well as the ones at the boundaries around the uplifts of Lunxian and Chengning.