超低渗—致密油藏水平井开发注采参数优化实践——以鄂尔多斯盆地长庆油田为例  

Optimization of horizontal well injection-production parameters for ultra-low permeable–tight oil production: A case from Changqing Oilfield, Ordos Basin

作　　者：赵继勇[1,2] 樊建明[1,2] 何永宏[2,3] 杨子清[1,2] 高伟[2,4] 高武彬[1,2] 

机构地区：[1]中国石油长庆油田分公司勘探开发研究院 [2]低渗透油气田勘探开发国家工程实验室 [3]中国石油长庆油田分公司油藏评价处 [4]中国石油长庆油田分公司油气工艺研究院

出　　处：《石油勘探与开发》2015年第1期68-75,共8页Petroleum Exploration and Development

基　　金：国家科技重大专项"大型油气田及煤层气开发:超低渗透油藏有效开采技术"(2011ZX05013-004)

摘　　要：注水补充能量水平井开发过程存在拟溶解气驱和水驱两种驱替机理,3个不同的渗流阶段。基于此认识,结合水平井开发试验跟踪评价结果,确定了注水井、采油井合理工作制度和注采参数确定原则:1采用注水井与水平井大规模体积压裂相结合的超前注水能量补充模式;2建立了不同储集层定向井超前注水和注水强度计算理论图版;3超前注水时机应在水平井完井之后;4水平井合理初期产量根据存地液量与排距、超前注水量、水线推进速度等参数确定;5注水未见效前合理生产流压略大于饱和压力,注水见效后合理生产流压不低于饱和压力的2/3,同时结合动态及时调整。基于研究成果,2013年HQ油田投产80口水平井,见水井比例由8.8%降到3.0%,水平井平均单井产量年递减控制在15%之内,取得了较好的实施效果。There are two kinds of displacement mechanisms and three different seepage stages during horizontal well development process with water injection energy. A reasonable injection-production working system of the basic principles and parameters are determined according to the evaluation results of horizontal well development test on the basis of understanding fundamental rules. （1） Advanced water injection energy supplement mode is proposed with the combination of injection wells and large volume water fracturing of horizontal wells. （2） Theoretical calculation chart of directional well advanced water injection and water injection intensity is established for various reservoirs. （3） The timing of advanced water injection should follow the completion of the horizontal wells. （4） Reasonable initial production of horizontal well is determined by the relationship of remaining fluid volume with row spacing, advanced injection water volume and flood front advancing velocity. （5） Reasonable production flowing pressure is slightly greater than saturation pressure before water injection does not work, when it works, the reasonable production flow pressure maintains no less than two-thirds of saturation pressure, and adjust it timely combining with dynamic production. Based on the research results, the HQ oilfield put 80 horizontal wells into production during 2013, the proportion of water-breakthrough wells reduces from 8.8% to 3.0%, the annual decrease of the average production of single horizontal well is controlled within 15%.

关 键 词：超低渗—致密油藏 水平井 体积压裂 存地液量 注采参数优化 长庆油田 

分 类 号：TE349[石油与天然气工程—油气田开发工程]