摘要
裂缝性礁灰岩稠油底水油藏普遍发育裂缝及孔洞,储层非均质性强。当油井含水快速上升后,诸多控水技术应用均无效。微粒过饱和充填控水技术应用取得了突破,但增产机理认识不清、增产效果评价方法缺乏。本文结合渗流力学水电等效变换原则明确技术控、堵、驱三重增油机理,建立双孔双渗模型分析裂缝、裂缝充填、环空充填和ICD控水强度等单因素和多因素对油井生产的影响,定量评价各参数对增产效果的影响,其中裂缝充填效果影响最大,最优方案增产效果达82.77%。成果应用于调整井措施应用效果评价,措施可增加可采储量约6.66×10^(4)m^(3),增产效果高达25%。微粒过饱和充填控水模拟技术为砂岩油藏和裂缝性油藏环空充填、环空过饱和充填和出砂井充填治理等提供了定量评价方法,为措施效果评价提供了可行的思路,具有很高的参考价值。
The fractured reef limestone reservoirs with bottom water have strong heterogeneity developed with fractures and vugs commonly.Many water control technologies have been applied,but none of them take effects after water cut rised rapidly.Particulate supersaturated filling has been applied to control water with a breakthrough,but the stimulation mechanism is unclear,and the evaluation method is lacking.This paper tried to clarify the stimulation mechanism on control,plugging and displacement of these techniques combined with equivalent transformation of hydropower on fluid mechanics,the influence of single-factor and multi-factor including fracture,fracture filling,annular filling and ICD water control measures on the production are analyzed by a dual-porosity and dual-permeability model.The effect of each parameter on the stimulation is evaluated quantitatively,among them the effect of fracture filling is the best with up to 82.77% of the stimulation by the best plan.The results have been applied to evaluate the effects of adjustment well measures,and then recoverable reserves may increase by about 6.66 ×10^(4)m^(3) with up to 25% of the stimulation.The particulate supersaturated filling technique for water control provides not only quantitative evaluation method for annular filling,annular supersaturated filling and filling in sand wells of sandstone reservoirs and fractured reservoirs,but also feasible idea to evaluate effects of the measures,which has high reference value.
作者
江任开
程佳
孙常伟
谷悦
李小东
Jiang Renkai;Cheng Jia;Sun Changwei;Gu Yue;Li Xiaodong(Shenzhen Branch of CNOOC China Limited,Shenzhen Guangdong 518000)
出处
《中外能源》
CAS
2022年第5期42-49,共8页
Sino-Global Energy
关键词
礁灰岩
裂缝性
底水稠油油藏
控水
微粒充填
评价方法
reef limestone
fractures
heavy oil reservoir with bottom water
water control
particle filling
evaluation method
