摘要
依据作者在我国南方的长期工作实践,参照国内外有关研究的新思路和新方法,对我国南方海相碳酸盐地区油气勘探提出下列意见:(1)从生、储、盖、运、聚、保六个要素全面评价南方海相地层油气资源是一项非线性系统工程。(2)基于油气演化特点,该区应以古生界为主要勘探层系,尤其应以下古生界为主,兼顾上古生界;以找气为主,油气兼探。(3)该区已划分出六套区域性滑脱系统,构造格架为层清一薄皮构造,应重视山前大规模逆掩推覆地带的油气勘探。(4)晚期成藏是该区油气地质发育的又一特点,造山期后的先压后张伸展构造和新构造断裂活动同油气运移和成藏密切相关。
In accordance with author's long-term experience in south China, and to some new thoughts and methods on research domestic and abroad, the following ideas are suggested for oil and gas exploration in the marine carbonate rock region, south China: 1. As a non-linearsystematic engineering, the oil and gas resources in marine strata, south China should be comprehensively evaluated in view of the six factors, i. e., sourcebeds, reserviors, caprocks, migration, accumulation and preservation of oil and gas. 2. On the basis of the oil and gas evolution peculiarities, the Paleozoic strata would be regarded as the main exploration tar- get, especially for the lower Paleozoic, whereas the upper Paleozoic must be taken into consideration, and the natural gas could be referred to a major object, but the oil must be also taken into account in the re- gion. 3. There are six regional slipping systems subdivided in this region, the tectonic framework is demon- strated to be a layerslip-thin skinned structure, and thus, the oil and gas explorationalong large scale piedmont overthrust nappe zones ought to be emphasized. 4. The late formation of oil and gas reservoirs is also a characteristic in the regional petroleum geological development and both postorogenic fore-com- pressive and after-tensile extensional tectonics and neotectonic faulting are well correlated with the oil and gas migration and reservoir formation.
