论文部分内容阅读
利用有限变形法把物体在变形过程中的应变和转动分离开来 ,并建立了位移函数 ,计算了转动特征量平均整旋角 ,用平均整旋角的平面变化来表示构造裂缝的发育程度和延伸方向。应用此方法对苏北盆地内东台坳陷西部金湖凹陷东南部卞闽杨构造带东部的闵桥断背斜中闵桥油田闵 2 0块火成岩裂缝进行了研究。研究表明 ,闵 2 0块在古新统阜宁组第一段和第二段中含有多个顺层的火山岩 ,并已发现火山岩油藏 ,储层空间以裂缝为主。计算结果表明 ,闵 2 0块阜宁组火山岩裂缝发育区主要分布在断块的东部和西部。东部裂缝发育区的裂缝有东西向和南北向两组 ;西部裂缝发育区的裂缝主要分为东西向和北东向两组。构造活动、断层、火山岩岩相、成岩作用等是控制火山岩裂缝发育的主要因素。
Using the finite deformation method, the strain and rotation of the object during the deformation process are separated, and the displacement function is established. The average full rotation angle of the rotation feature is calculated, and the plane variation of the average full rotation angle is used to represent the development degree of the tectonic fracture. Extension direction. In this paper, the study on the igneous fractures of Min 20 member in Minqiao faulted anticline in Minqiao Oilfield in Minhang Bridge, southeast of Jinhu Sag, western Nei Dongtai Depression, North Jiangsu, was studied. The study shows that the Min20 block contains multiple stratigraphic volcanic rocks in the first and second stages of the Paleo-Xinhua Funing Formation. It has been found that volcanic reservoirs and fractured reservoirs are dominated by fractures. The results show that the fractures of Funing Formation in Min 20 area are mainly distributed in the east and west of the fault block. There are two sets of east-west and north-south directions for the cracks in the eastern crack development zone. The cracks in the western crack development zone are mainly divided into east-west and north-east directions. Tectonic activities, faults, volcanic facies and diagenesis are the main factors that control the development of volcanic rocks.