摘要
提出了提高油田采收率分三步走的研究战略:第一步,研究“大尺度”未波及剩余油的分布特点及开采方法;第二步,研究“小尺度”未波及剩余油的分布特点及开采方法;第三步,在前两步研究的基础上,研究提高已波及驱油效率的方法。提出了开发“大尺度”未波及剩余油富集区的10项技术:①注水高粘原油正韵律油层顶部未波及剩余油开采技术,包括:侧钻水平井、周期注水、水气交替注入和凝胶-井下爆炸-酸压组合;②边角影响未波及剩余油开采技术,包括:反向定向垂直裂缝压裂、侧钻水平井和常规水平井;③层系内由于各小层物性差异开采不均衡形成的未波及剩余油开采技术,包括:堵水、调剖、低渗透层改造等井下措施配套、加密调整井和改变液流方向。
The research strategy being divided into three-step runs for EOR is proposed.The first step is the study of distribution type and exploitation technology of“megascopic scale”unswept remaining oil;the second step is the study of distribution type and exploitation technology of“macroscopic scale”unswept remaining oil;the third step is,on the basis of these two steps,to study the way of improving oil displacement efficiency in swept areas.Ten technologies for developing three enriched areas of“megascopic scale”unswept remaining oil are presented.They are:①technolo-gies for producing the unswept remaining oil at the top of the positive rhythm reservoirs with high viscous oil,including horizontal sidetracks,cyclic waterflooding,water /gas alternation,gel/propellant/acid-fracturing treatment;②technolo-gies for producing the unswept remaining oil caused by side and corner parts in oil reservoirs,including reversed and vertical fracture fractur ing with reversed direction and orientation,horizontal sidetracks,horizontal well;③technologies for producing the unswept remaining oil formed by non-proportional development of each substratum with different petrophysical properties,including dewnhole measures(water shutoff,profile control,and stimulation of low permeabili-ty,etc.),infill well and changing direction of filtration flow.
出处
《新疆石油地质》
CAS
CSCD
2002年第2期134-138,共5页
Xinjiang Petroleum Geology
