西安石油大学学报（自然科学版）2024，Vol.39Issue(2)：55-61,7.DOI:10.3969/j.issn.1673-064X.2024.02.007
鄂尔多斯盆地页岩油储层前置CO2压裂流体分布特征
Fluid Distribution Characteristics in CO2 Fracturing for Shale Oil Reservoirs in Ordos Basin
摘要
Abstract
Taking the shale oil reservoir in the Ordos Basin as the object,the effects of CO2 injection volume,well closing time,horizon-tal-to-vertical permeability ratio of reservoir,and perforation and fracturing modes of dual horizontal well on fluid distribution were stud-ied using reservoir numerical simulation software CMG-GEMand GOHFER.The results indicate that the difference between horizontal and vertical permeability of reservoir leads to a larger spreading range of CO2 in the horizontal direction than in the vertical direction,and the injection volume has a more sensitive impact on the spreading length.Under the conditions of this study,when the injection vol-ume is 140 m3,the horizontal spreading ranges of adjacent sections intersect,which can be considered as the optimal injection volume.Extending the well closing time can increase the spreading range of CO2,but the impact of injection volume is greater.Therefore it is recommended to control the spreading range by adjusting the injection volume.The horizontal-to-vertical permeability ratio of reservoir has a greater impact on the spreading range of CO2.The larger the permeability ratio,the wider the horizontal spreading range and the narrower the vertical spreading range.Comparing the zipper-type and synchronous perforation fracturing modes of dual horizontal wells,the zipper type perforation fracturing helps to improve the CO2 spreading range and is beneficial for oil and gas development.The study can provide theoretical guidance for optimizing the parameters of CO2 fracturing technology in shale oil reservoirs.关键词
储层改造/前置CO2 注入/流体分布/非常规油气/页岩油储层Key words
reservoir reconstruction/pre-CO2injection/fluid distribution/unconventional oil and gas/shale oil reservoir分类
能源科技引用本文复制引用
臧雨溪,王海柱,王斌,孙居正,王天宇,田港华,石明亮,吴毓乾,田守嶒..鄂尔多斯盆地页岩油储层前置CO2压裂流体分布特征[J].西安石油大学学报（自然科学版）,2024,39(2):55-61,7.基金项目
国家重点研发计划项目"复杂油气智能钻井理论与方法"(2019YFA0708300) （2019YFA0708300）
中国石油大学(北京)自然科学基金(2462021 YXZZ009) （北京）
中国石油天然气集团有限公司-中国石油大学(北京)战略合作科技专项(ZLZX2020-01) （北京）
陕西省创新能力支撑计划项目"非常规油藏低碳环保提高采收率技术创新团队(2023-CX-TD-31)" （2023-CX-TD-31）
中国石油天然气股份有限公司科学研究与技术开发项目"鄂尔多斯盆地页岩油勘探开发理论与关键技术研究"(2021 DJ1806) （2021 DJ1806）
