苏北盆地阜宁组泥页岩裂缝类型及形成期次  

Types and forming epochs of the fractures in the shale of Funing Formation of Subei Basin

作　　者：刘平[1,2] 陈书平[1,2] 刘世丽[3] 梁宇生[1,2] 程海生[3] 

机构地区：[1]油气资源与探测国家重点实验室,北京102249 [2]中国石油大学(北京)地球科学学院,北京102249 [3]中石化江苏油田分公司地质科学研究院,江苏扬州225009

出　　处：《西安石油大学学报（自然科学版）》2014年第6期13-20,28,共9页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家自然科学基金项目(编号:41172124)

摘　　要：根据苏北盆地高邮、金湖、盐城主要生油凹陷80口取心井岩心裂缝观察描述结果,按照产状和成因分别将该区裂缝分为直立缝等5种裂缝和平移式剪裂缝等8种裂缝。根据裂缝交切组合关系及应力状态,结合构造演化史,划分了各类型裂缝发育期次,并匹配了吴堡运动、三垛运动等主要构造事件。其中,压开直立缝等对于油气保存和运移具有重要作用。裂缝的系统性发育有效地提高了苏北盆地阜宁组泥页岩段储渗性能。Based on the observation description of the cores from 80 wells in 3 main source sags of Gaoyou Sag.Jinhu Sag and Yancheng Sag,the fractures in the shale of this area are classified into 5 types according to thr inclined angle of the fractures,including vertical fracture,steeply inclined fracture,gently inclined fracture,horizontal fracture and mesh fracture,and they are classified into 8types according to the genesis of the fractures,including five types of structural fractures and three types of nonstructural fractures.The developing epochs of various types of fractures are determined according to the intersection combination relation and the stress state of fractures and structure evolution history,and they are matched with the main tectonic events such as Wubu movement,Sanduo movement,etc.Of the types of fractures.undrawing vertical fractures are important to the preservation and migration of hydrocarbon.The systemic development of the fractures effectively improves the permeability of the shale of Funing Formation in Subei Basin.

关 键 词：泥页岩 裂缝 发育期次 构造应力场 阜宁组 苏北盆地 

分 类 号：TE122.2[石油与天然气工程—油气勘探]