姬黄37区提高单井产量对策研究

Research of the countermeasures enhancing single-well production of Jihuang 37 Area

姬黄37区长6油藏属于低孔、低渗、低产的油藏,针对其开发过程中出现的含水上升快、高含水油井增多、单井产量递减严重的情况,从地质、开发两方面分析产生的原因有储层物性差、非均质性强、注水时机不当、单砂层注采关系不完善、个别井区注入水单向突进严重及地层堵塞等,对此提出针对性的治理措施有压裂改变渗流方式、超前注水增加地层能量、精细注水改善水驱、化学堵水治理裂缝、改善注水水质防止污染、化堵调剖进行解堵等,达到了降低产量递减的目的.措施井平均单井日增油达1.35 t.

By analyzing the geology and development status of Chang-6 reservoir in Jihuang 37 area,it is held that the causes leading to the high rising rate of water cut,the increase of high water-cut wells and high decline rate of single-well production of the low-porosity,low-permeability and low-production reservoir include poor reservoir property,serious heterogeneity,improper water injection timing,not perfect single sand layer injection-production relationship,serious injection water breakthrough in some well blocks,formation plugging,etc.For these reason,a series of countermeasures are put forward,including hydraulic fracturing for changing seepage manner,advanced water injection for increasing formation energy,fine water injection for improving waterflooding effect,chemical plugging for controlling formation fractures,improving injected water quality for preventing formation pollution,chemical profile control for formation plugging removal,etc.The application of the measures has a certain effect: the single well production is increased by 1.35 t/d.