渤海湾盆地火山岩喷发旋回和期次研究的方法及应用
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摘要
火山作用具有多期喷发的特点,造成岩相变化快、物性变化大和不同期次的火山岩叠置,从而使地震响应特征复杂,规律性差。目前的三维地震资料只能分辨出火山岩的分布范围,对火山岩喷发旋回和期次的划分、有效储层的预测及油气藏评价仍十分困难,直接影响着石油、天然气藏的有效开发。文章阐述了利用火山岩岩心、薄片和测井资料来划分火山岩喷发旋回和期次的方法,并用该方法对渤海湾盆地KL井区火山岩旋回和期次进行了深入的分析,发现研究区火山岩主要由4个喷发旋回和6个喷发期次组成,4个喷发旋回之间均以沉积夹层或风化壳为边界,并且大规模的火山喷发活动与断层有着十分密切的关系。
The volcanic action has the characteristics of multi-stage eruption, which creates the lithofacies change fast, the physical property changes greatly and different stage volcanic rock superimposed, and makes complex seismic response characteristics and poor seismic regularity. The 3D seismic data can only distinguish the distribution range of the volcanic rock at present, it is still difficult not only to divide the volcanic eruption cycle, stage, but also to predict the effective reservoir and evaluate gas pool as well, by which the reservoirs are affected directly. This article introduces some methods to divide volcanic eruption cycle and stage with the core, slice and log information, and by which the volcanic rock eruption cycle and stage of the KL well field in the Bohai Bay are divided, the result show that the volcanic rock are consisted of four eruption cycles and six stages, the interbeds or crust of weathering are as interfaces between the four eruption cycles, and the large scale volcanic eruptions were in close relationship with faults.
The volcanic action has the characteristics of multi-stage eruption, which creates the lithofacies change fast, the physical property changes greatly and different stage volcanic rock superimposed, and makes complex seismic response characteristics and poor seismic regularity. The 3D seismic data can only distinguish the distribution range of the volcanic rock at present, it is still difficult not only to divide the volcanic eruption cycle, stage, but also to predict the effective reservoir and evaluate gas pool as well, by which the reservoirs are affected directly. This article introduces some methods to divide volcanic eruption cycle and stage with the core, slice and log information, and by which the volcanic rock eruption cycle and stage of the KL well field in the Bohai Bay are divided, the result show that the volcanic rock are consisted of four eruption cycles and six stages, the interbeds or crust of weathering are as interfaces between the four eruption cycles, and the large scale volcanic eruptions were in close relationship with faults.
引文
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[2]李石,王彤等.火山岩[M].北京:地质出版社,1981:20-40.
[3]李兼海,邓文祥等.火山岩的野外工作方法[M].北京:地质出版社,1980:20-40.
[4]周守为主编.中国近海典型油田开发实践[M].北京:石油工业出版社,2009:246-267.
[5]陈壁主编.渤海油田上产3000万吨成果论文集[M].北京:中国石化出版社,2007:146-179.
[6]代黎明,李建平,周心怀等.渤海海域新近系浅水三角洲沉积体系分析[J].岩性油气藏,2007,19(4):75-81.
[7]王志武,杨继良,高瑞琪.中国石油地质志大庆油田卷[M].北京:石油工业出版社,1993.
[8]王在平,辛仁臣.松辽盆地北部徐家围子断陷沉积体系及其演化规律[J].大庆石油学院学报,2001,25(3):36-40.
[9]丁秀春.测井响应在火成岩储层研究中的应用[J].特种油气藏,2003,10(1):69-72.
[10]于建国.砂砾岩体的内部结构研究与含油性预测[J].石油地球物理勘探,1997,32(增):15-19.
[11]赵华,姜秀清,朱应科.砂砾岩体沉积期次划分方法研究[J].石油地球物理勘探,2010,8(4):15-20.
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