塔里木塘古巴斯坳陷及中上奥陶统地震相分析
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摘要
塘古巴斯坳陷研究程度较低,开展该区域的地质研究必须依靠现有的地震资料。根据地震反射特征,结合塘古巴斯坳陷及邻区中晚奥陶世的地质背景,可以将该区域中上奥陶统划分为5个地震层序。根据内部反射结构和外部几何形态、频率、振幅、连续性等参数,在中上奥陶统地震反射剖面上可以识别出6种地震相,并编制了S1层序的地震相图。根据沉积构造背景及钻井资料,将地震相分布转化为岩性分布。
So far, a geological study to Tanggubasi Sag must depend on existed seismic data just because of a little research. In this paper, the Middle and Upper Ordovician of sag can be classified into five seismic sequences based on the research on seismic reflection and geological setting of middle and late Ordovician of both Tanggubasi Sag and adjoining area. According to internal reflection structure and external geometry, frequency, amplitude and continuity, six kinds of seismic facies may be identified from seismic reflection profile of Middle and Upper Ordovician. And then, a seismic facies of S1 sequence is mapped out. In addition, a distribution of seismic facies can be changed into a lithological distribution based on some data of both sedimentary structural setting and drilling.
So far, a geological study to Tanggubasi Sag must depend on existed seismic data just because of a little research. In this paper, the Middle and Upper Ordovician of sag can be classified into five seismic sequences based on the research on seismic reflection and geological setting of middle and late Ordovician of both Tanggubasi Sag and adjoining area. According to internal reflection structure and external geometry, frequency, amplitude and continuity, six kinds of seismic facies may be identified from seismic reflection profile of Middle and Upper Ordovician. And then, a seismic facies of S1 sequence is mapped out. In addition, a distribution of seismic facies can be changed into a lithological distribution based on some data of both sedimentary structural setting and drilling.
引文
[1]张宗命.塔里木盆地中央隆起的构造特征与演化[M]//童晓光,梁狄刚,贾承造,等.塔里木盆地石油地质研究新进展.北京:科学出版社,1996:110-119.
[2]张振声.塔中低凸起的形成和演化[J].石油勘探与开发,2002,29(1):28-31.
[3]孙家振,李兰斌.地震地质综合解释教程[M].武汉:中国地质大学出版社,2002.
[4]李正文,赵志超.地震勘探资料解释[M].北京:地质出版社,1988:74-94.
[5]张万选,张厚福.区域地震地层学研究[M].东营:石油大学出版社,1988:72-77.
[2]张振声.塔中低凸起的形成和演化[J].石油勘探与开发,2002,29(1):28-31.
[3]孙家振,李兰斌.地震地质综合解释教程[M].武汉:中国地质大学出版社,2002.
[4]李正文,赵志超.地震勘探资料解释[M].北京:地质出版社,1988:74-94.
[5]张万选,张厚福.区域地震地层学研究[M].东营:石油大学出版社,1988:72-77.
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