南堡油田稠油CO2吞吐选井模糊综合评判方法研究

The Study of Fuzzy Comprehensive Evaluation Method for Heavy Oil CO2 Huff and Puff Well Selection in Nanpu Oilfield

二氧化碳吞吐控水增油矿场试验是南堡油田增产作业的有效技术手段,但如何选井已成为能否取得预期效果的难点,南堡油田属于复杂断块油藏,各项影响因素关系复杂,通过常规理论分析量化研究困难.提出应用层次分析法和模糊综合评判方法相结合,充分考虑地质与开发因素共18项,其中主要影响因素6项,建立稠油CO2吞吐选井评价模型,对南堡油田区块32口稠油CO2吞吐选井进行评价,实际增油量的回归方程拟合优度判定系数为0.7493,对于油田开发产量预测已经达到较高精度,确定模糊评判得分0.8以上即为可实行的CO2吞吐施工方案.

The expected effect of CO2 huff and puff, a effective technical means of increase production for Nanpu Oilfield, is hard to be definite because of the difficulty of oil well selection of the trial. It may be in trouble for the traditional theoretical analysis and the quantitative research of Nanpu Oifield, due to the complexity and discontinuity of its oil deposit and the complex relationship between the related factors. Given the 18 related geological factors (6 main factors), the two methods, analytic hierarchy process and fuzzy comprehensive evaluation method, was recommend to establish the evaluation model for the trial of heavy oil CO2 huff and puff well selection in this paper. The selection of 32 heavy oil wells in Nanpu Oilfield was assessed with the model. The determination coefficient of goodness of fit of regression equation of actual oil increment is 0.7493. The prediction of oil field development output has reached a high accuracy. The construction scheme of CO2 huff and puff can be implemented if the fuzzy evaluation score is above 0.8.