长岭1号气田火山岩气藏产能控制因素研究

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。

Key Controls on Gas Productivity in Volcanic Gas Reservoir of No. 1 Gas Pool of Changling

In recent years, large scale gas reservoirs have been found in deep volcanic layer of Songliao basin. The volcanic gas reservoir is characterized as extremely complex geological structure, several volcanic bodies reciprocally superposing in different periods, sharp lateral variations of lithology and lithofacies, various thickness, serious anisotropy, poor continuity, and poor contrast property. There is no successful experience about development of volcanic gas reservoir as a worldwide technological problem. The factor controlling gas productivity during process development of volcanic gas reservoir is a puzzled question. According to feature of the volcanic reservoir mentioned above, we interpreted lithologies, lithofacies, physical property of volcanic reservoir, degree of fracture development, pressure-sensitivity of reservoir, drilled well types as well as reservoir pollution, then got the main factor controlling gas productivity. This result will provide some guides for evaluating the gas productivity of volcanic reservoir and determined the schedule for development of gas volcanic reservoir.