用非线性变形预测断块裂缝——以金湖凹陷闵15-18断块为例  

Prediction of Block Fracture Using Nonlinear Deformation——An example of Block Min 15-18 in Jinhu Sag

作　　者：马欣本[1] 

机构地区：[1]中国科学院物理研究所

出　　处：《新疆石油地质》2007年第1期72-74,共3页Xinjiang Petroleum Geology

摘　　要：非线性变形能够用和分解的方法把物体变形过程中的应变和转动分离开来,通过建立位移函数,计算转动特征量-平均整旋角,用平均整旋角的平面变化表示构造裂缝的发育程度和延伸方向。位于苏北盆地金湖凹陷闵桥断背斜北部的闵15-18断块,在古新统阜宁组中发育着多层顺层的火山岩,已发现火山岩油藏,储集层空间以裂缝为主。平均整旋角计算结果是,闵15-18断块阜宁组火山岩构造裂缝发育区主要分布在断块的东部、中部和西部,裂缝有北西西向、东西向和南北向三组。计算结果已被油田开发现状所证实。Nonlinear deformation can be used to separate from strain and rotation in process of deformation by means of its method of sum resolution, set up displacement function, calculate mean rotation angle, a representative value of the rotation and show the growth level and the extension direction of the structural fractures by the angle＇s changes in plane. In Block Min 15-18 located in north part of Minqiao fault anticline in Jinhu sag in Subei basin, multi-bedding volcanic reservoir in Funing formation of Palaeocene has been found, dominated by fissure/fracture in reservoir pore space. The calculated results show that the fissure/fracture-developed areas occur in the east, middle and west parts of the fault block, with fracture orientations of NWW, EW and SN, which are proved by the oilfield development status.

关 键 词：苏北盆地 非线性变形 平均整旋角 裂缝 火山岩 

分 类 号：TE112.222[石油与天然气工程—油气勘探]