松辽盆地中生代火山岩地球物理特征及分布预测  

Geophysical Features and Distribution Prediction of Mesozoic Volcanic Rocks in Songliao Basin

作　　者：徐淑娟[1,2] 赵泽辉[3] 姜晓华[1,2] 程宏岗[1,2] 崔俊峰[1,2] 贾丽[1] 周文杰[1] 

机构地区：[1]中国石油勘探开发研究院廊坊分院,河北廊坊065007 [2]中国石油天然气集团公司天然气成藏与开发重点实验室,河北廊坊065007 [3]中国地质大学(北京)海洋学院,北京100083

出　　处：《非常规油气》2016年第3期27-34,共8页Unconventional Oil & Gas

基　　金：国家重大科技专项(2011ZX05007-005)资助

摘　　要：中生代火山岩是松辽盆地深层天然气藏的主力储层,主要发育在营城组和火石岭组。为预测中生代火山岩的分布及有利区带,结合地质、地震、测井等资料总结了火山岩的地球物理特征,进而对营城组、火石岭组火山岩分布及岩相进行识别,并结合烃源岩的分布对火山岩体进行了优选评价。研究结果表明,松辽盆地火山岩受基底断裂控制,地震反射剖面显示锥形或丘形火山岩多期叠置的特征,水平时间切片和相干体切片上火山岩体外形不规则,呈蚯蚓状或杂乱反射;地震相、地震属性分析等是识别火山岩岩相分布的有效手段,近火山口爆发相和溢流相为有利相带,低频弱振幅丘形地震相及代表了近火山口爆发相,低频强振幅丘形或透镜状地震相代表了近火山口溢流相;综合识别预测营城组和火石岭组火山岩363个,面积为2.1×10~4km^2,为火山岩勘探部署提供了依据。Mesozoic volcanic rocks are the major payzone of deep gas reservoir in Songliao Basin,developed in Yingcheng and Huoshiling formation. In order to predict the distribution of Mesozoic volcanic rocks and the favorable zones,combined with the data from geological,sesmic and logging operations,the geophysical characteristics of volcano rocks has been summarized,and identified the volcano rock and facies from Ying Cheng and Huoshiling formations,the optimization and evaluation of volcanic rock body are also carried out based on the distribution of source rock. Research results show that： Volcano rocks were controlled by basement fault in Songliao basin,the seismic profile showing a cone or dome shape with multi period stacked feature of volcano rock,irregular appearance found in horizontal and coherent slices,with earthworm or complex shape reflection; Analysis of seismic facies and seismic attribute is an effective means for identifying the distribution of volcanic rock facies,the explosive facies and overflow facies around volcanic crater are the best favorable zone,the low frequency and weak amplitude seismic dome facies and zigzag logging facies with low resistivity are coincide with theexplosive facies near the crater. Low frequency and high amplitude dome or lens-type seismic facies and medium-high resistance thick layered micro-tooth logging facies represented the overflow facies near the carter. All the 363 volcanic rocks were identified with area of 2. 1×104km2in Songliao basin,and provided a basis for exploration deployment in volcanic rock reservoir.

关 键 词：松辽盆地 中生代火山岩 地球物理特征 分布预测 

分 类 号：P618.13[天文地球—矿床学]