多级调剖调驱技术效果及剩余油分布  

EFFECTS OF MULTISTAGE PROFILE CONTROLLING-DISPLACING TECHNOLOGY AND THE REMAINED OIL DISTRIBUTION

作　　者：梁守成[1,2] 李强 吕鑫[1,2] ZHOU Yanxia 曹伟佳[4] 卢祥国 LIANG Shoucheng;LI Qiang;LU Xin;ZHOU Yanxia;CAO Weijia;LU Xiangguo(State Key Laboratory of Offshore Oil Exploitation,Beijing 100028,China;CNOOC Research Institute,Beijing 100028,China;University of North Dakota,ND58202,USA;MOE Key Laboratory of Enhanced Oil Recovery,Northeast Petroleum University,Daqing 163318,China)

机构地区：[1]海洋石油高效开发国家重点实验室,北京朝阳100028 [2]中海油研究总院,北京朝阳100028 [3]University of North Dakota,ND58202,USA [4]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318

出　　处：《大庆石油地质与开发》2018年第6期108-115,共8页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家自然科学基金项目“抗盐型聚合物油藏适应性及其改进方法基础研究”(51574086).

摘　　要：为治理渤海稠油油藏经长期注水开发形成的优势通道,多级组合深部液流转向技术受到广泛关注。以油藏工程、物理化学和分析化学等为理论指导,以物理模拟为技术手段,以渤海S油田为模拟对象,开展了分级组合深部调剖调驱效果及剩余油分布研究。结果表明:目标油藏储层经长期注水注聚开发,已经形成了大孔道或高渗条带,大孔道治理是改善油田开发效果的前提条件;与聚合物溶液中分子聚集体分布相比较,聚合物微球粒径分布比较集中,具有"堵大不堵小"渗流特性,"强凝胶封堵大孔道+聚合物微球转向中低渗透层调驱"多级调剖调驱技术兼顾了大孔道治理和中低渗透层深部液流转向技术需求,可以取得较好增油降水效果;"行列式"注水开发井网相邻水井不宜同时进行调驱和调剖;剩余油主要分布在中低渗透层、远离主流线的两翼。In order to control and manage the dominated and selective channels of the long-term water flooding in Bohai dense oil reservoirs, the deep liquid transferring technique with multistage combination is widely concerned. Theoretically guided by the physicochemistry, analyzing chemistry and so on, and by means of the physical simulation, taking Bohai Oilfield S as the simulated object, the effects of the deep profile control and flooding and moreover the distribution of the remained oil were carried out for the multistage combination. The achievements show that with the long-term water and polymer floodings of the target oil reservoirs, the big or high-permeability belts were caused, the channel control and management is the precondition of improving the effects of the oilfield development; comparing with the distribution of the molecular aggregate in the polymer solution, the particle size distribution of the polymer microspheres was relatively concentrated and characterized by ＂blocking the large and unplugging the small＂ in the flow, the multistage profile controlling and flooding technique characterized by ＂strong polymer gel blocked big channels ＋ the polymer microsphere transfers to the medium and low permeability reservoirs to profile control and flood＂ takes both the technical requirements and advantages in the large channel management and the deep liquid transfer ot the middle and low permeability layers, thus much better oil incremental and water reduction effects were achieved; the neighboring water injectors for the line well pattern of the water flooding were not suitable for simultaneous profile control and flooding; the remained oil is mainly distributed in the middle and low permeability reservoirs and the two wings away from the main stream line.

关 键 词：渤海油藏 多级组合 调剖调驱 物理模拟 采收率 剩余油分布 机理分析 

分 类 号：TE357[石油与天然气工程—油气田开发工程]