摘要
综合运用地震、钻井等资料,结合乌尔逊—贝尔凹陷南屯期断层特征分析,建立研究区调节带识别标志并圈定其发育范围,最终划分了2个Ⅰ级和18个Ⅱ级构造调节带,分为横向调节型、同向叠覆型、同向趋近型和背向平行型4类。研究结果认为,区域不协调伸展应变以及侧列断层发育模式导致在沿伸展断层走向基底相对脆弱地带发育构造调节带。这些地带不仅是油气的有利聚集部位,而且控制凹陷"S"型平面展布和沉降中心迁移以及沉积物厚度变化。构造调节带通过侧列断层、走向斜坡、纵向凸起及双向调节等模式控制各次凹物源体系方向。
After setting up recognition marks and boundary confirmation, two first-order and eighteen secondorder structural accommodation zones can be identified by using seismic and well data and analysis of fault characteristics in K1 n stage of the Wuerxun-Beier depression. Four types were determined, including transverse accommodation zones, synthetic overlapping, synthetic approaching, antithetic paralleling. This study results show that along the strike of tensional faults, structural accommodation zones which developed on the weakness zones of the basement, were caused by regional disharmonie extension strain and the model of lateral fault developed. The ＂S＂ plane distribution and structural pattern, migration of subsidence center and thickness of sediments were controlled by structural accommodation zones, most of which are advantageous zones for oil and gas accumulation. Directions of provenance system in secondary depression were controlled by the model of lateral fault, strike ramp, vertical uplift and double direction accommodation.
出处
《现代地质》
CAS
CSCD
北大核心
2009年第5期872-879,共8页
Geoscience
关键词
乌尔逊—贝尔凹陷
构造调节带
侧列断层
物源方向
Wuerxun-Beier depression
structural accommodation zone
lateral fault
provenance direction
