三水盆地CO2气藏形成条件

三水盆地中、新生代岩浆活动频繁。通过对CO₂气藏形成条件的研究,认为三水盆地的纯CO₂气藏的CO₂属岩浆-幔源和碳酸盐岩热变质作用的无机成因,含CO₂油气藏中的CO₂属有机成因。由于该盆地岩浆活动剧烈,气源充足,储层类型多样,区域性盖层好,由断裂控制的构造圈闭发育,为CO₂气的聚集成藏提供了有利的场所。通过对CO₂气藏环带性分布规律的分析,指出在盆地中心次流纹岩分布区的沿大断裂发育的有利圈闭构造是下一步勘探的目标。

FORMING CONDITIONS OF CO2 GAS RESERVIOR IN SANSHUI BASIN

Magma activity occurred in Mesozoic and Cenozoic in Sanshui basin. By the research of forming conditions of CO_2 gas reservoir, we conclusioned that the cause of formation of pure CO_2 gas reservoir is magma-mantle and carbonate inorganic origin, the CO_2 gas in oil and gas reservoir is organic origin. Magma activity occurred in the area, and there are lots of CO_2 gas resources, and the reservoir types are multiplicities, and the overlying formation is good, and the structure traps with fault cortrol are development, there were the favorable places of CO_2 gas being accumulated. By the research of distribution discipline of CO_2 gas reservoir, we pointed out that the next exploration target is the favorable traps with big faults and subliparite in the middle of the basin.