特低渗透油藏水驱开发效果评价  

Waterflooding Performance Evaluation in Ultra-Low Permeability Oil Reservoir

作　　者：王东琪[1] 殷代印[1] 

机构地区：[1]东北石油大学,黑龙江大庆163318

出　　处：《特种油气藏》2017年第6期107-110,共4页Special Oil & Gas Reservoirs

基　　金：国家自然科学基金"低渗透油藏表面活性剂驱微乳液渗流机理及数值模拟研究"(51474071);东北石油大学研究生创新科研项目"低渗透油藏微乳液驱微观渗流机理研究"(YJSCX2017-006NEPU)

摘　　要：针对特低渗透油藏水驱开发效果难以准确评价的问题,引入即时含水采出比、有效驱动系数、多向连通比例等指标完善评价体系,同时运用模糊多级综合理论,建立了基于隶属度区间分布函数的特低渗透油藏水驱开发效果综合评价方法。研究结果表明,该方法精确反映了区块符合"好、中、差"等级的概率,能有效指导特低渗透油藏剩余油挖潜措施的选择。将研究成果应用于朝阳沟油田朝89区块,2013年实施缝网压裂和油水井对应改造措施后,区块动用状况得到明显改善,截至2017年,能量保持水平由69.00%提高至80.32%,吸水厚度比例由44.00%提高至71.30%,有效驱动系数由79.45%提高至88.32%。研究成果对指导特低渗透油藏开发动态指标调整具有重要意义。Instantaneous ratio between water-cut and recovery degree, effective driving coefficient, multi-direc- tional connectivity ratio and other indicators are introduced to improve the evaluation system and the limitation in waterflooding performance evaluation of ultra-low permeability oil reservoir. Fuzzy multi-order comprehensive theo- ry is used to develop a ultra-low permeability oil reservoir waterflooding performance evaluation method based on the distribution function of membership interval. Research demonstrates that the evaluation could accurately charac- terize the probabilities of ＂high, medium and low＂ level, which could effectively guide the optimization of remai- ning oil recovery treatments. This evaluation method is applied to Block 89 of Chaoyanggou Oiffield. A favorable de- velopment performance is gained after network fracturing and corresponding stimulation treatments in oil and water wells. Up to 2017, the formation energy maintaining level is increased from 69. 00% to 80. 32%, the proportion of water-in-take thickness is improved from 44.00% to 71.30% and the effective driving coefficient is enhanced from 79. 45% to 88.32%. This research is of great significance to the dynamic adjustment in the development of ultra- low permeability oil reservoir.

关 键 词：特低渗透油藏 水驱开发效果 隶属度 朝阳沟油田 

分 类 号：TE348[石油与天然气工程—油气田开发工程]