摘要
西缘冲断带是鄂尔多斯盆地针对构造圈闭勘探最早的地区，因其构造破碎、断层繁多、地层结构关系复杂，油气勘探成效不甚明显。通过近期地震、地质综合研究，在吸收前人研究成果基础上，本文指出研究区“背驮式”构造发展样式，尤其是作为逆冲边界的马儿庄断裂对该区成藏具有明显的控制作用。由于受力大小与应力方向的差异，不同样式的局部构造沿该断裂的走向而形成，也赋予了不同的含油特征。
The west margin thrust belt is the earliest exploration region aiming at structural traps in the Ordos Basin. Because of their broken structures, various faults, and the complex relationships between the formations, oil and gas exploration results are not so obvious. Through comprehensive studies of the recent seismology and geology, on the basis of absorbing predecessors＂ research results, the paper pointed out a ＂piggyback＂ style of structural development in the study area, especially, as the thrust boundary, Maerzhuang fracture had obvious control on the reservoir forming in the area. Due to the the size of the weight and the different stress direction, different styles of local structures formed along the trend of the fracture. It was given the different characteristics of the oil-bearing.
关键词
马家滩逆冲段
“背驮式”构造
马儿庄断裂
边界断裂
控藏作用
Majiatan overthrust segment
＂Piggyback＂ structure
Merzhuang fracture
Boundary fracture
Controlling of reservoirs
