Study on the Adaptability of Depressurization and Injection of MD Film in Low Permeability Reservoirs

2019 3rd International Workshop on Renewable Energy and Development

能源学;生态环境科学

Chen, Gang^1 ; Lai, Nanjun^1

School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu

610500, China^1

关键词: Depressurizations;    Film treatment;    Injection techniques;    Laboratory test;    Pore throat radius;    Water blocking damage;    Water saturations;    Water-flooding development;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/267/6/062048/pdf
DOI  :  10.1088/1755-1315/267/6/062048

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Low-permeability reservoirs generally have poor physical properties and refer to reservoirs with low porosity and the radius of small pore in the reservoirs is large. In the process of water flooding development, due to the serious damage of pore water blocking, it is difficult to inject water or even impossible to inject water, which seriously reduces the development efficiency of water flooding. The MD film augmented injection techniques is an effective way to solve this problem. The laboratory tests show that the rock samples have the best effect of reducing pressure after being treated by the MD film and the water flooding flow rate is 0.05∼0.10 mL/min. At the same time, the water saturation of the core pores increases and the water blocking damage of the pores is relieved after the MD film treatment, which is favorable for water injection. The results of the nuclear magnetic field show that the T2 cutoff value of the rock samples treated by the MD membrane has decreased, and the porosity of flowable part core has increased. The molecular membrane agent could be apllied to the low permeability reservoir with the a pore throat radius greater than 0.01 ^m.