doi:10.16186/j.cnki.1673-9787.2020.5.1

Received:2019/12/21

Revised:2020/02/26

Published:2020/09/15

Study on optimizing parameters of nitrogen foam flooding in Fan 162 oilfield based on analytic hierarchy process and fuzzy comprehensive evaluation

ZHANG Yanyu1, HU Hang1, YANG Peng2, GAO Zeyu1

1.School of Petroleum Engineering， China University of Petroleum （ East China） ， Qingdao  266580 ， Shandong， China;2.Research Institute of Engineering Technology， CNPC Greatwall Drilling Company，Panjin  124010 ， Liaoning， China

Abstract:In recent years， there are serious problems of injection water channeling and oil well flooding in tight sandstone reservoir of Fan 162 oilfield， which greatly limits the efficient development and production of the reservoir. In order to solve the water channeling problem in tight sandstone reservoir of Fan 162 oilfield， a novel approach for optimizing the parameters of nitrogen foam flooding was proposed in this paper. Firstly， the improved hierarchical fuzzy comprehensive evaluation and the analytic hierarchy process were used to identify the water channelings quantitatively， and the cross-well tracer technology was used to verify the water channeling. based on the decision of water channelings， the optimization of injection parameters of nitrogen foam flooding was studied by means of numerical reservoir simulation and orthogonal experimental design method. The results showed that 10 out of 12 water channelings were successfully predicted， i. e. ， the prediction accuracy of the comprehensive evaluation method was 83. 3% ；The optimal injection parameters of nitrogen foam flooding were as follows ： injection amount of foaming agent was 900 m³ ， injection rate is 15 m³/d， concentration of foaming agent is 0.7% and gas-liquid ratio was 2： 1 ； The oil recovery of the most efficient strategy determined by this approach was 4. 31% higher than that of conventional waterflooding in 15 years， and increased oil was 145 800 m³ and reduced water content was 7.94% ， which meant this approach could improve the development effect of tight sandstone reservoir in the oilfield.

Key words:fuzzy comprehensive evaluation;analytic hierarchy process;Fan 16 oilfield;orthogonal experimental;water channeling;nitrogen foam flooding

基于层次分析法和模糊综合评判法的_省略_62区块氮气泡沫调驱参数优化研究_张艳玉.pdf