潜山油藏分布规律及其主控因素——以海拉尔盆地贝尔凹陷布达特群为例  

Distribution and main control factors of buried hill reservoirs——taking Budate group of Beier Depression as an example

作　　者：付广[1] 玄昌姬[1] 

机构地区：[1]大庆石油学院,黑龙江大庆163318

出　　处：《油气地质与采收率》2008年第6期6-9,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家"973"重大基础研究项目"高效大气田形成机理与分布研究"(2001CB209104)

摘　　要：通过对贝尔凹陷布达特群潜山油藏分布规律及其主控因素的研究,得到油藏类型主要为潜山顶部风化壳和潜山内部裂缝破碎带2种,前者少于后者。潜山顶部风化壳油藏的形成与分布主要受源岩、不整合面油势能汇聚区和古地貌高点分布的控制,而潜山内部裂缝破碎带油藏的形成与分布主要受源岩、源断裂分布和裂缝发育区分布的控制。潜山成藏具有油沿不整合面侧向运移至潜山顶部风化壳聚集和油沿断裂垂向运移至潜山内部裂缝破碎带聚集2种模式。苏德尔特潜山构造带中部至霍多莫尔背斜构造带地区是布达特群潜山顶部风化壳油藏形成与分布的有利地区。苏德尔特潜山构造带中部及其附近,以及苏乃诺尔构造带、贝西洼槽东北部、苏德尔特潜山构造带东部和敖瑙海洼槽中部的局部地区是潜山内部裂缝破碎带油藏形成与分布的有利地区。Based on the research of distribution of oil reservoirs and their control factors in buried hill of Budate group of Beier Depression,the main types of oil reservoirs in Budate group were considered to be top weathered crust and internal fracture crushed zone. The number of reservoirs of the former is less than that of the posterior. It was considered that the formation and distribution of weathered crust oil reservoirs in buried hills are mainly controlled by source rock,accumulation areas of oil potential unconformity and high of ancient physiognomy. While oil reservoirs in internal fracture crushed zone are mainly controlled by source rock,the distribution of faults connecting source rock and fracture development region. There are two models for the oil migration; oil migrates along the unconformity surface to weatheredtrust,or migrates along fractures to internal Iracture crashed zone. The favorable areas for the formation and distribution of weathered crust oil reservoirs in buried hill of Budale group are considered to be the middle of Sudeerte burial hill and Huoduo-moer anticline structural zone. While parts of the middle and near to Sudeerte burial hill structural zone and Surennuorr structural zone,northeast of Beixi subsag,and middle of Aonaohai subsag are considered,to be the favorable areas for oil entrapment.

关 键 词：贝尔凹陷 布达特群潜山 油藏类型 分布规律 主控因素 成藏模式 有利区 

分 类 号：TE112.111[石油与天然气工程—油气勘探]