【作者】 文瑞霞；

【导师】 胡玉双； 于晶；

【作者基本信息】 大庆石油学院 ， 地球探测与信息技术， 2007， 硕士

【摘要】 本论文以构造地质学、储层沉积学以及火山岩岩石学理论为指导,在认真分析和借鉴前人研究成果的基础上,充分利用地震、测井、钻井资料,采用多种地震手段,以徐家围子断陷营城组地层为目标,开展火山岩储层地震预测研究。通过对研究区营城组地层的细分层解释,得出了火山岩发育地层的分布规律:营城组一段地层在研究区大面积分布,营城组三段地层仅分布于兴城、汪家屯、宋站南等地区。通过对火山岩储层岩性、岩相及其与储集空间关系的研究,并结合徐家围子断陷的钻井资料,确定了该地区流纹岩和熔结凝灰岩、喷溢相上部亚相和爆发相热碎屑流亚相的孔隙度和渗透率一般略高、物性较好。针对研究区营城组一段地层,从火山岩储层地震识别入手,应用全三维可视化与相干体技术预测出18个火山机构,应用地震属性分析技术预测出火山岩相带沿北北西向宋西断裂分布,应用地震反演技术预测出火山岩储层的厚度分布存在两个高值区。并以此为基础,通过剖面与平面结合分析得出:营城组一段火山岩在研究区内广泛分布,总的趋势是北薄南厚、西薄东厚;火山岩储层发育受火山机构、火山岩相带、断裂和埋深影响较大,以爆发相和喷溢相为主,靠近断层附近地区发育,物性好、厚度大。最后,通过对徐家围子断陷深层天然气成藏条件的分析,再结合火山岩储层的预测结果以及多口井的试气结果,指出了研究区营城组一段的有利区带分布。更多还原

【Abstract】 Guided by the theory of Architectonic Geology, Reservoir Sedimentology and Volcanics Petrology, based on carefully analyzing and referring the research fruits of the predecessors, sufficiently using the data of seismic, well logging and well drilling, adopting several methods of seismic, this paper forecasts and researches the volcanic reservoir at the objective of Yingcheng formation of Xujiaweizi fault depression.Through the interpretation of target stratum, the distribute law of the volcanic formation is obtained: the YingchengI formation are wide distributed and YingchengШformation are only destributed in Xingcheng, Wangjiatun and the southern of Songzhan.Through the research of the lithology, lithofacies and the relations with the accumulate room of volcanic reservoir, and combinded with the well drilling data of Xujiaweizi fault depression, it is sure that the porosity and the permeability of the rhyolite and the welded tuff, the upper subfacies of effusion facies and heat clastic subfacies of burst facies in this area is often high and those physical property is favorable.In view of YingchengI formation, beginning with the seismic identify of the volcanic reservoir, using the technique of 3D visualization and coherence, 18 volcanic edifices in the target stratum are forecasted, using the technique of the seismic attribute analyzing, this paper forecasts that the volcanic lithofacies is distributed along Songxi fault of NNW, and using the technique of the seismic inversion, this paper forecasts that there are two areas in which the thickness of the volcanic reservoir is high-value. Based on these, taking analysis of the section and the plane, it can be found that: the volcanic of YingchengI formation is destributed widely in the region of interest, the total trend is that the thickness value of north is low and that of south is high, that of west is low and that of east is high; The growing of the volcanic reservoir is affected largely by the volcanic edifice, the volcanic facies belt, the fault and the depth of burial, it is usually that the burst facies and the effusion facies are main, and the area near the fault is vegetal, the physical property is favorable and the thickness is high.At last, through analyzing the diagenesis condition of the deep gas reservoir of Xujiaweizi fault depression, combinding with the forecast fruit of the volcanic reservoir and the test gas fruit of multiwell, the distribution of the beneficial areas are pointed out in YingchengI formation.更多还原