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近年来,在我国松辽盆地深层火山岩储层中发现了大规模的天然气藏。火山岩气藏地质结构极其复杂,具有多火山体多期次喷发交互叠置、岩性岩相变化快、厚度变化大、非均质性极强、连续性及可对比性差等特点。目前,火山岩气藏的开发在国内外还无成功的经验可借鉴,属世界级难题,而气藏产能控制因素不清是制约火山岩气藏开发的瓶颈。针对火山岩气藏特征,通过开展岩性岩相、储层物性、裂缝发育程度、储层压敏性、井型以及储层污染等因素对气藏产能的影响研究,搞清了火山岩气藏产能的主控因素,为评价火山岩气藏产能、明确开发思路提供了一定的指导。
In recent years, large-scale natural gas reservoirs have been found in deep volcanic reservoirs in the Songliao Basin of our country. The geological structure of volcanic gas reservoirs is extremely complicated. It has the characteristics of multi-volcanic multi-stage eruptions overlapping, rapid lithofacies changes, large thickness variations, strong heterogeneity, poor continuity and contrast. At present, the development of volcanic gas reservoirs has no successful experience at home and abroad to draw lessons from, which is a world-class problem. The unclear factors of gas reservoir productivity control are the bottlenecks restricting the development of volcanic gas reservoirs. Aiming at the characteristics of volcanic gas reservoirs, the author studies the influence of lithologic and lithofacies, physical properties of reservoirs, degree of fracture development, pressure sensitivity of reservoirs, well type and reservoir pollution on the productivity of gas reservoirs, and ascertains the productivity of volcanic gas reservoirs The main controlling factors for the evaluation of volcanic gas reservoir productivity, clear development of ideas to provide some guidance.