不同岩溶缝洞油藏剩余油类型及开发对策  

Remaining-Oil Distribution Types and Measures of Different Karst Fracture-Cave Oil Reservoirs

作　　者：巫波[1] 李正民[1] 荣元帅[1] 

机构地区：[1]中国石化西北油田分公司,新疆乌鲁木齐830011

出　　处：《特种油气藏》2016年第2期93-96,155,共4页Special Oil & Gas Reservoirs

基　　金：国家"973"项目"碳酸盐岩缝洞型油藏开采机理及提高采收率研究"(2011CB201005);国家科技重大专项"大型油气田及煤层气开发"子课题"塔里木盆地大型碳酸盐岩油气田开发示范工程之碳酸盐岩缝洞型油藏开发关键技术完善与应用"(2011ZX05049)

摘　　要：针对塔河碳酸盐岩缝洞型油藏剩余油分布认识不清的问题,以缝洞油藏特征为基础,运用油藏精细刻画、测井、生产动态特征及差异连通性分析方法,提出了塔河碳酸盐岩缝洞型油藏八大类13个亚类剩余油分布类型,明确了其中8个亚类属于油藏类型决定的特有型,5个亚类是由缝洞发育特征决定的共有型。针对不同剩余油类型提出了适合的矿场开发对策:采用注气方式动用阁楼型剩余油;部署直井动用分支暗河、深部暗河、交错断裂分段型、平行断裂型及T56—T74断裂型剩余油;采取侧钻方式开发低幅小残丘、沟谷两翼型、T74内幕断裂及U型剩余油;采取排水采油、选择性堵水、关井压锥及酸压方式动用高渗通道内的低渗区型、裂缝窜进封挡型及不同部位充填型剩余油。不同岩溶缝洞油藏剩余油类型及开发对策在塔河油田取得了较好的开发效果,对相似油藏的剩余油挖潜有一定借鉴作用。Due to the unclear characterization of carbonate fracture-cave oil reservoir remaining oil distributions in Tahe Oilfield,fine reservoir characterization,well logging,production performance analysis and connectivity analysis are used to determine the remaining oil distribution types of carbonate fracture-cave oil reservoirs in Tahe Oilfield. There are 8-calss with 13 sub-class remaining oil distribution types,including 8-subclass specific types depending on reservoir type and 5-subclass common types depending on fracture-cave development. The field development measures for different remaining oil distributions are presented. Gas injection is recommended to produce the loft-style remaining oil. Vertical well is used to produce the remaining oil in branch-river,deep underground-river,intersecting rupture segmentation,parallel rupture,and T65-T47 rupture.Sidetracking is adopted to produce the remaining oil in the low-amplitude small-scale monadnock,dual-wing valley,T47 insider rupture and U-style rupture zones. Oil recovery by water drainage,selective plugging,shut-in coning control and acid fracturing are applied to produce the remaining oil in the low-permeability zone,blocking zone with fracture channeling,different filling-type parts of within high-permeability channels.Better production performances are achieved by classification of different remaining oil distributions and the corresponding development measures in karst fracture-cave oil reservoir,which may also provide a reference for remaining oil production of similar oil reservoirs.

关 键 词：缝洞型油藏 剩余油分布 油藏特征 连通性 开发对策 塔河油田 

分 类 号：TE344[石油与天然气工程—油气田开发工程]