正演模拟技术在渤中21-2构造碳酸盐岩地层岩性尖灭线刻画中的应用研究
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摘要
渤中21-2构造区古生界圈闭由断层和碳酸盐岩地层上倾尖灭控制,在描述岩性边界的过程中,尖灭线的解释存在多解性,给解释带来了困难。为了更精细地刻画碳酸盐岩地层的岩性尖灭线,寻找一种更为接近实际的解释方案,落实构造规模及储量规模,针对碳酸盐岩地层地震反射特征及沉积特征,展开了正演模拟研究来指导碳酸盐岩地层岩性尖灭线的解释工作,运用地震属性技术以及正演模拟技术对该层段典型地震剖面进行正演模拟,总结地震反射尖灭点与地质尖灭点之间的关系,以此来刻画岩性边界。
Paleozoic traps of Bozhong 21-2 tectonic zone are controlled by faults and up dip pinchout. In the process of lithology boundary description, pinchout line explanation has multi-solutions and it brings difficulty for explaination. In order to get the pinchout line for more accurately describing carbonate formation, a more actual explaination method should be seeked to confirm structure size and reserve scale. In practical work, by considering carbonate formation seismic reflection characteristics and sedimentary characteristics, forward simulation has been carried out in the area to provide guidance for pinchout line explaination. By using the seismic attribute technology and forward simulation technology, the forward simulation of typical seismic profiles has been modeled, and then seismic reflection pinchout point and geological pinchout point have been summarized so as to describe the lithology boundary.
Paleozoic traps of Bozhong 21-2 tectonic zone are controlled by faults and up dip pinchout. In the process of lithology boundary description, pinchout line explanation has multi-solutions and it brings difficulty for explaination. In order to get the pinchout line for more accurately describing carbonate formation, a more actual explaination method should be seeked to confirm structure size and reserve scale. In practical work, by considering carbonate formation seismic reflection characteristics and sedimentary characteristics, forward simulation has been carried out in the area to provide guidance for pinchout line explaination. By using the seismic attribute technology and forward simulation technology, the forward simulation of typical seismic profiles has been modeled, and then seismic reflection pinchout point and geological pinchout point have been summarized so as to describe the lithology boundary.
引文
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[2]李庆忠.走向精确勘探的道路-高分辨率地震勘探系统工程剖析[M].北京:石油工业出版社,1994:12-30.
[3]董清华.震源数值模拟[J].世界地震工程,2000,16(3):27-32.
[4]牛滨华,孙春岩.各向同性介质与地震传播[M].北京:石油工业出版社,2002:33-38.
[5]郭春华,杨宇,英振敏,等.缝洞型碳酸盐岩油藏流动单元概念和研究方法探讨[J].石油地质与工程,2006,20(6):34-37.
[6]李功强,张国成,李保华,等.鄂尔多斯盆地东北部碳酸盐岩地层的岩性剖面研究[J].石油地质与工程,2008,22(1):40-43.
[7]代金友,何顺利.靖边气田奥陶系内幕构造演化与成藏新认识[J].石油地质与工程,2008,22(3):40-42.
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