火山旋回划分方案对比及在储层预测中的意义

Comparison of volcanic cycle division programs and its significance for reservoir prediction

针对火山岩油气藏的勘探,学者们提出了很多火山旋回划分方案,差异明显。通过对前人方案的对比,结合对赤峰地区中新生代火山岩的考察,探讨了各种方案的异同和优缺点,提出了旋回—亚旋回—韵律—层的4级划分方案。讨论了火山旋回划分在储层预测中的适用性,认为不同方式的火山喷发对火山旋回划分精度要求不一,火山喷发旋回中不同类型、不同级别的地质界面对火山岩成藏起着不同的控制作用。

For exploration of volcanic oil and gas reservoirs,many programs of volcanic cycle division have been proposed,which are different remarkably. By comparison with the programs suggested by our predecessors,the similarities and differences as well as pros and cons of various programs are discussed and a four level( cycle – subcycle – rhythms – stratum) division program is proposed in combination with the field investigation of the Mid- Cenozoic volcanic rock in Chifeng area. The adaptability of volcanic cycle division to reservoir prediction is discussed and it is suggested that different accuracies of volcanic cycle division are required in volcanic eruption areas with various eruption styles,and in volcanic eruption cycles,different types of geologic interface at different levels have distinct controlling action over reservoir forming in volcanic rock.