火山岩储层天然气运聚成藏模拟:以徐家围子断陷深层为例

发布时间：2018-08-04 09:23

【摘要】：与火山岩有关的油气藏或油气显示已在世界范围内被广泛发现,然而受火山岩储层强非均质性的影响,揭示火山岩油气成藏过程的盆地模拟研究进展十分缓慢,尚未见到关于火山岩储层中油气运聚成藏模拟研究的报道.采用PetroMod软件首次成功模拟了火山岩储层天然气运聚成藏过程,系统论述了含油气盆地模拟工作中三维精细地质模型的建立、关键参数的选取,并在统计国内外火山岩物性的基础上提出了不同岩性火山岩孔隙度与深度的关系,结合研究区岩相分布,考察了不同断裂活动期和不同运移算法时深层火山岩天然气运聚过程.结果揭示:徐家围子断陷深层有机质具有接力生气的特征,无主生气期,火山岩气藏主要形成于泉头组-青山口组末期,气藏发育位置受控于断裂分布与活动期、火山岩体和储层孔隙度;活动期次与时间可影响天然气聚集层位,深层气源断裂活动期要早于94.5Ma;采用混合法模拟火山岩储层中的油气运聚成藏比较合适.徐家围子断陷深层火山岩天然气的下一步勘探方向为斜坡带、洼陷深部的微幅度构造、火山岩体和岩性尖灭带,同时深层致密砂砾岩储层也应有较大潜力.
[Abstract]:Oil and gas reservoirs or hydrocarbon indications related to volcanic rocks have been widely found in the world. However, due to the strong heterogeneity of volcanic rock reservoirs, the basin simulation research on hydrocarbon accumulation process of volcanic rocks is very slow. There is no report on simulation of oil and gas migration and accumulation in volcanic reservoir. The process of gas migration and accumulation in volcanic reservoir is successfully simulated by PetroMod software for the first time. The establishment of 3D fine geological model and the selection of key parameters in the simulation of oil-bearing basin are systematically discussed. Based on the statistics of the physical properties of volcanic rocks at home and abroad, the relationship between porosity and depth of volcanic rocks of different lithology is put forward. Combined with the lithofacies distribution in the study area, the migration and accumulation process of natural gas in deep volcanic rocks with different fault activity periods and different migration algorithms are investigated. The results show that the organic matter in the deep layer of Xujiaweizi fault depression has the characteristics of relay generation, no main gas generation period, the volcanic gas reservoir mainly formed at the end of Quantou formation and Qingshankou formation, and the development position of the gas reservoir is controlled by the fault distribution and active period. The porosity of volcanic body and reservoir, the active stage and time can influence the accumulation of natural gas, and the active period of deep gas source fault is earlier than 94.5Ma. it is more suitable to simulate hydrocarbon migration and accumulation in volcanic reservoir by mixing method. The next exploration direction of deep volcanic rock gas in Xujiaweizi fault depression is slope zone, micro-amplitude structure in deep part of sag, volcanic rock body and lithologic pinnacle zone, and deep dense gravel reservoir should also have great potential.
【作者单位】：中国石油大学非常规油气与新能源研究院;中国石油大庆油田公司勘探开发研究院;新南威尔士大学;
【基金】：国家重点基础研究发展计划(973计划)(No.2009CB219306) 山东省优秀中青年科学家科研奖励基金项目(No.BS2014HZ001)
【分类号】：P618.13

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