四川盆地阳新统非背斜气藏形成的控制地质因素

THE CONTROLLING GEOLOGICAL FACTORS IN THE FORMATION OF NON-ANTICLINAL GAS POOLS IN YANGXIN SERIES IN SICHUAN BASIN

本文总结了四川盆地二叠系阳新统非背斜气藏的产、储特征,探讨了非背斜气藏的地质控制因素及其分布,认为中、小断层及其伴生裂缝的发育、白云岩、古构造和地层水因素等是形成非背斜气藏的关键。通过盆地综合评价计算,指出了非背斜气藏发育的区块,为扩大勘探领域和老气区挖潜指出了方向。

In this paper, the production and reserve characteristics of non-anticlinal gas pools in Yaugxin series (lower permian) in Sichuan basin were summarized, and the geological controlling factors of non-anticlinal gas pools and their distributions were studied. The research results indicate that the key for the formation of non-anticlinal gas pool is the development of middle and small faults and their associated fractures, dolomitization palaeostructures and formation water, etc. The flourishing regions of non-anticlinal gas pools were showed depending on comprehenzive basin evaluation. Furthermore, the above-mentioned researchs pointed out clearly the direction for new exploration regions and tapping potentials of those gas producing regions.