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英台断陷发育营城组一段火山岩岩性—构造气藏,营城组二段致密沉火山碎屑岩岩性气藏及登娄库组—泉头组砂岩气藏3种类型气藏。在分析气藏特征与成藏主控因素的基础上,指出了每种类型气藏的分布规律,并针对不同类型气藏分别采用特尔非法、容积法及地质分析类比法计算了天然气资源量。评价结果表明,英台断陷天然气总资源量为2 848×108 m3,剩余资源量为2 228×108 m3,占总资源量的78%,其中营城组二段的致密沉火山碎屑岩气藏资源探明率仅为18%,剩余资源潜力大,为下一步勘探的重要接替领域。
The Yingtai faulted depression developed three types of volcanic lithologic-structural gas reservoirs in Yingcheng Formation, the dense Shenchoke clastic lithologic gas reservoirs in the second member of Yingcheng Formation and the Dengloucuu-Quantu Formation sandstone gas reservoirs in Yingcheng Formation. Based on the analysis of the characteristics of gas reservoirs and the controlling factors of hydrocarbon accumulation, the distribution rules of each type of gas reservoirs are pointed out. For different types of gas reservoirs, the quantities of natural gas resources are calculated using Terre illegality, volumetric method and geological analogy method respectively . The evaluation results show that the total resources of natural gas in the Yingtai Fault Sag are 2 848 × 108 m3 and the remaining resources are 2 228 × 108 m3, accounting for 78% of the total resources. Among them, dense Shenchen clastic rocks Gas resources proven rate of only 18%, the potential for the remaining resources for the next exploration of the important areas of succession.