大庆长垣油田特高含水期水驱精细挖潜措施后产量变化规律  

CHANGED LAWS OF THE PRODUCTION AFTER WATERFLOODING FINELY-TAPPED-POTENTIAL STIMULATIONS FOR DAQING PLACANTICLINE OILFIELDS AT THE STAGE OF EXTRA-HIGH WATERCUT

作　　者：吴晓慧[1] WU Xiaohui(Exploration and Development Research Institute of Daqing Oilfield Co Ltd.,Daqing 163712,China)

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《大庆石油地质与开发》2018年第5期71-75,共5页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家科技重大专项"高含水油田提高采收率技术"(2011ZX05010)

摘　　要：大庆油田进入特高含水期以后,针对剩余油高度分散的开发状况,采用大规模的精细挖潜措施控制产量递减速度。为深入认识评价水驱精细挖潜措施的长期效果,实现全油田的推广应用,从渗流力学基本原理出发,研究了影响油田产量递减规律的地质及开发因素,分析了油相渗透率以及开发调整措施对产量递减规律及产量递减率的影响。以7个水驱精细挖潜示范区为例,研究油田特高含水期水驱精细挖潜措施后产量变化规律,测算精细挖潜措施影响产量递减率值。结果表明:精细挖潜有效控制了产量递减速度,实施精细挖潜的4年期间,产量保持稳定不递减,7个示范区精细挖潜累计增油66. 3×104t;精细挖潜结束后产量递减加快,但一段时期内产量仍高于常规措施,措施后初期产量递减率值增加2. 26百分点,之后逐渐与常规措施趋于一致。After entering into the stage of extra-high watercut for Daqing Oilfield,in the light of the developed situation of the highly-scattered remained oil,a large size of the fine-potential-tapping stimulations were adopted to control the production decline rate. In order to deeply understand and evaluate the long-term effects of the waterflooding fine-potential-tapping stimulations and furthermore to realize the generalized application in the whole oilfield,from the viewpoint of the basic principle of the seepage mechanics,the geology and developmental influencing factors on the laws of the oilfield production decline were studied,and moreover the impacts of the oil-phase permeability and development adjusting measures on the production decline law and rate were analyzed. Taking seven finely-tapped-potential demonstrating blocks of the waterflooding as examples,the variation laws of the production rate after the fine-potential-tapping stimulations for the waterflooding at extra-high watercut stage were studied,the valueof the production decline was calculated and measured for the influence of the measures stated above. The achievements show that the fine-potential-tapping technical measures can effectively control the production decline rate,during the four years of finely tapping the potential,the production remains stable and furthermore the decline doesn＇t happen,the accumulative incremental oil is up to 66. 3 × 10^4 t for the potential tapping in seven demonstrating blocks; after the stimulation finished the production declines rapidly and moreover for a certain period of time,the production is still higher than the conventional stimulations; the increment of the initial production decline reaches 2. 26 percentage points,and then gradually accord with the conventional ones.

关 键 词：特高含水期 调整措施 产量递减规律 产量递减率 影响因素 大庆油田 

分 类 号：TE323[石油与天然气工程—油气田开发工程]