低渗稠油油藏迭代降黏剂驱技术及应用  

Iterative Viscosity Reducing Agent Flooding Technology forLow-permeability Heavy Oil Reservoirs and Its Application

作　　者：焦红岩 JIAO Hongyan(Xianhe Oil Production Plant,SINOPIC Shengli Oilfield Company,Dongying,Shandong 257237,China)

机构地区：[1]中石化胜利油田分公司现河采油厂,山东东营257237

出　　处：《西安石油大学学报（自然科学版）》2024年第6期51-57,共7页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家科技重大专项“复杂油气藏精细表征及剩余油分布预测”(2011ZX03009-003)。

摘　　要：针对低渗稠油油藏降黏剂驱易形成高黏阻滞带,阻碍驱替能量有效传导的问题,提出迭代降黏剂驱技术,借助岩心流动物理模拟实验及矿场应用效果分析,评价该技术实施效果,分析各主控因素的影响规律。结果表明:迭代降黏驱技术宜采用大排量高速突破阻滞带,后用适中排量的长时间稳定降黏剂驱方式;实验条件下对于高黏阻滞带突破速度宜选择1 mL/min,闷井时间可取24 h,后续稳态注入速度可取0.5 mL/min,确保降黏剂与储层稠油充分乳化分解重质组分,也借助注入流体能量扩大波及系数;迭代降黏剂驱较常规水驱、常规降黏剂驱采收率提高分别达18.99%、13.19%。实施迭代降黏驱后3口受效井产能分别较措施前提高到1.6、2.5和2.8倍。研究成果可为迭代降黏剂驱技术的方案设计提供借鉴。To solve the problem of high viscosity blocking zone formed in viscosity reducing agent flooding of low-permeability heavy oil reservoirs,which hinders the effective transmission of displacement energy,an iterative viscosity reducing agent flooding technology is proposed.By means of physical simulation experiments of core flow and their field application effect analysis,the implementation effectiveness of this technology is evaluated,and the influence laws of its main control factors are analyzed.The results indicate that the iterative viscosity reduction flooding technology should adopt a high displacement to break through the blocking zone at high speed,and then use a moderate displacement to stabilize the viscosity reduction flooding for a long time.Under experimental conditions,the breakthrough speed of the high viscosity blocking zone is 1 mL/min,the well is shut in for 24 hours,and the subsequent steady-state injection rate is 0.5 mL/min to ensure that the viscosity reducer fully emulsifies and decomposes the heavy components of the reservoir heavy oil,and to expand the sweep coefficient by energy of injected fluid.Compared to conventional water flooding and conventional viscosity reducing agent flooding,the iterative viscosity reducing agent flooding can increase recovery rate by 18.99%and 13.19%respectively.After implementing iterative viscosity reduction flooding,the production capacity of three effect wells was 1.6,2.5,and 2.8 times higher than that before the measures.This research result can provide reference for the design of iterative viscosity reducing agent flooding technology.

关 键 词：迭代降黏剂驱 主控因素 提高采收率 低渗稠油 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]