大庆石油地质与开发2025，Vol.44Issue(3)：57-63,7.DOI:10.19597/J.ISSN.1000-3754.202401016
利用水驱井解封化学驱后封存储量经济界限确定方法
A method to determine economic limit of plugged reserves after chemical flooding by reperforating water flooding wells
摘要
Abstract
At present,the plugged reserves of Class Ⅱ reservoirs in Daqing Oilfield is 9 603×104 t.In order to re-lease the potential of these reserves and reduce its impact on production,the research is conducted to effectively de-plug the post-chemical flooding reserves of Class Ⅱ reservoirs using water flooding patterns.By combining breakev-en principle and fluid flow theory,formulas for calculating economic limits for various de-plugging indexes are es-tablished,effectively solving the relationship between economic and engineering parameters for de-plugged well,quantifying intervals selection criteria for de-plugged well and plotting relationship chart of cumulative incremental oil production and de-plugged net pay thickness with different input-output ratios of different oil prices.The results show that as oil price increases,input-output ratio decreases,and the limits of cumulative incremental oil produc-tion and reperforated net pay thickness decrease.With oil price of 60 USD/barrel,the minimum reperforated thick-ness for de-plugged well is 7.47 m,lower limit of cumulative incremental oil production is 186.25 t,and input-out-put ratio reaches 1∶2.Actual data verifies that both daily incremental oil production and cumulative oil production reach the calculated lower limits,realizing economic development of plugged strata series.This method can effec-tively guide the selection of de-plugged well limits and de-plugged intervals,improving theoretical methods for lim-its determination of de-plugging post-chemical flooded intervals by water-flooding wells,and providing guiding sig-nificance for development of layered sandstone reservoirs.关键词
经济界限/封存储量/水、聚驱同采/二类油层/解封/水驱井网/渗流理论Key words
economic limits/plugged reserves/co-production of water-polymer flooding/Class Ⅱ reservoir/de-plug/water-flooding well pattern/fluid flow theory分类
石油、天然气工程引用本文复制引用
赵云飞,王海艳,王福林,王朋,王志新,崔建峰,李洪男,王璐,杨晨,冯程程..利用水驱井解封化学驱后封存储量经济界限确定方法[J].大庆石油地质与开发,2025,44(3):57-63,7.基金项目
国家科技重大专项"大型油气田及煤层气开发"(2016ZX05054) （2016ZX05054）
中国石油大庆油田有限责任公司现场试验项目"利用水驱井网有效开发二类油层化学驱后储量现场试验"(DQP-2021-YQCGC-XCSY-002). （DQP-2021-YQCGC-XCSY-002）
