摘要
岩溶-裂缝是塔河油田西南部地区上奥陶统覆盖区中—下奥陶统碳酸盐岩储层主要储集空间类型。依据岩心观察、显微镜薄片鉴定、扫描电镜、钻井、深浅侧向和FMI成像测井等资料,综合识别了中—下奥陶统储层裂缝和孔洞发育段,认为该区储层缝洞发育特征与塔河油田主体区有较大的不同,其主要的储集空间类型为半充填—未充填的构造缝和溶蚀扩大缝,且以高角度斜裂缝和垂直裂缝为主,低角度裂缝较少;微裂缝和中缝发育,大裂缝和孔洞总体不发育,利用储层多因素综合评价方法指出了研究区内裂缝和孔洞发育的有利地区。
Karst-fracture is important type of main reservoir space of Lower-Middle Ordovician carbonate reservoir in the southwest region of Tahe Oilfield.Based on collected data including core observation,microscopic identification of thin slice,SEM,well drilling,deep and shallow counting line and FMI logging,this paper comprehensively identified karst-fracture development zone of Lower-Middle Ordovician and indicated the larger difference between developmental characteristics of reservoir fractures and pores and main region of Tahe Oilfield.The half filling and unfilling structure fracture and corroded fissure are the main reservoir space,while high angle and vertical fracture developed,low angle fracture poorly developed;microfracture and moderate fracture developed,microfracture and pores poorly developed in general.The authors pointed out the development region of fractures and pores by the multi-factors evaluation method to reservoir.
出处
《现代地质》
CAS
CSCD
北大核心
2009年第4期699-708,共10页
Geoscience
基金
国家重点基础研究发展计划"973"项目(2006CB202302)
中国石油科技创新基金研究项目(2008D-5006-01-06)
中国石化西北油田分公司科研项目(KY-2006-028)
关键词
塔河油田
西南部地区
中—下奥陶统
碳酸盐岩储层
缝洞发育特征
Tahe Oilfield
the southwest region
Lower-Middle Ordovician
carbonate reservoir
karst-fracturecharacteristics
