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大牛地气田区块是我国较为重要的石油开采区,由于该区储层本身所具有的低渗低孔的特点,阻碍了石油的勘探开采进度。文章针对该区块的这一特点,进行了室内综合性评价实验。实验中采用SPAN-80(0.2%)和聚合醇(0.3%)注入到钻井液中;结果显示渗透恢复率由原来的72%提升到改善后的83%,整体结果可提高8-15个百分点。由于实验设计合理,实验数据分析科学,本实验所优选的钻完井液体系适合大牛地气田区块储层保护。
The block of Daniudi gas field is the most important petroleum exploitation area in China. Due to the characteristics of low permeability and low porosity in the reservoir itself, the progress of oil exploration and exploitation is hindered. According to the characteristics of the block, the article conducted a comprehensive indoor evaluation experiment. In the experiment, SPAN-80 (0.2%) and polymer alcohol (0.3%) were injected into the drilling fluid. The results showed that the recovery rate of permeation increased from 72% to 83%, and the overall result could be increased by 8-15% . Due to the reasonable experimental design and experimental data analysis science, the drilling and completion fluid system optimized in this experiment is suitable for reservoir protection in Daniudi gas field.