构造坡折带在周返地区岩性圈闭勘探中的应用  

Application of Tectonic Slope-break Analysis in Lithology Trap Prospecting of Zhoufan Area

作　　者：陈筱琳[1] 

机构地区：[1]长江大学,湖北武汉430100

出　　处：《江汉石油职工大学学报》2017年第3期8-10,共3页Journal of Jianghan Petroleum University of Staff and Workers

摘　　要：以江汉盆地潜北凹陷周返断裂带古近系潜江组为例,对潜江凹陷层序进行地层学研究,建立了潜江组层序地层格架,确定了各层序及体系域的砂体展布规律。该区受区域构造应力的影响,区内发育了一系列近北东向断层,这些断层与近北西-南东走向的砂体相交,形成断层切割长条形砂体的断层岩性圈闭。整体解剖发现这些断层都具有同生性和继承性,表现为周矶断裂带构造坡折发育,在低位区,极易形成上倾尖灭的岩性油藏,周返地区东北向断层与西北向砂岩尖灭线斜交,是断层-岩性油藏发育区。Taking Paleocene Qianjiang formation in Jianghan basin of Zhoufan tectonic slop break as example, through sequence study of Qianjiang sag, sequence framework, sandstone distribution of each sequence and sequence system are established. As the effect of tectonic stress, the area develops a series of N--E orientated faults. These faults cross with sandstones with nearly Northwest trend. Thus, the long sandstones cut by the faults form the fault --lithology traps. These faults are syngeneic and inherited, so the fault tectonic slope break develops. Lithological reservoir with upward tilting commonly exists in the low stand system tract. The crossing area of N--E faults and N --W sandstones are the favorable targets for the faults--lithology traps.

关 键 词：断陷湖盆坡折带 断层-岩性圈闭 周返地区 低位扇砂体 

分 类 号：TE112.3[石油与天然气工程—油气勘探]