火山岩体地震特征识别技术与应用研究  

RESEARCH ON THE IDENTIFICATION TECHNIQUE AND APPLICATION OF SEISMIC CHARACTERISTICS FOR VOLCANIC ROCKS

作　　者：李勇[1] 宋宗平[2] 李琼[1] 李正文[1] 

机构地区：[1]成都理工大学信息工程学院,四川成都610059 [2]大庆油田有限责任公司勘探分公司,黑龙江大庆163000

出　　处：《矿物岩石》2008年第3期105-110,共6页Mineralogy and Petrology

摘　　要：利用地震反射特征和反演所得的特征参数等相结合的地震特征识别技术在无井或少井的火山岩地区可以直接识别火山岩体的位置及范围。将此识别技术对某油田的营城组火山岩体进行识别与评价中,圈出4个最佳有利火山岩体,并利用密度技术对新圈出的最佳有利火山岩体进行油气检测,密度小于或等于2.53 g/cm3的火山岩体部位为天然气富集部位或富集空间,钻井后证实有很好的地质效果和较高的勘探开发成功率,为复杂的火山岩体的识别与预测提供了新的技术支持。在营城组火山岩体的识别与评价中发现火山岩储层在空间中存在复杂多变性,表现出较强的非均质性和特征差异性,其储层存在分割现象,但是,在好的岩性和构造背景下仍可形成局部天然气的富集。In volcanic rock region where there are no drilled wells or fewer drilled well,an identification technique by application of seismic reflection combined with inversed characteristic parameters was used to determine the location and scope of volcanic rock bodies in the Yinchen Formation of certain oilfield. 4 volcanic rock bodies were delineated and the existence of gas and oil in these volcanic rock bodies was detected by density technique. It was showed that the locations with density less than or equal to 2.53 g/era3 were the accumulation positions or space of natural gas. The application of this method obtained geological effect and high success ratio for exploration and development of gas and oil. It was fund that the volcanic reservoir of the Yingcheng Formation was complicated and varied with obvious heterogeneity and characteristic difference and with segmented reservoir. However,local gas enrichment was likely to be formed under the conditions of favorable lithology and structure.

关 键 词：火山岩 地震反射特征 速度剖面 密度剖面 识别 

分 类 号：P588.14[天文地球—岩石学] P315.61[天文地球—地质学]