| Autor: |
He, Jie, Guo, Xiangdong, Cui, Hongjun, Lei, Kaiyu, Lei, Yanyun, Zhou, Lin, Liu, Qinghai, Zhu, Yushuang, Liu, Linyu |
| Zdroj: |
Arabian Journal of Geosciences; Jan2022, Vol. 15 Issue 2, p1-12, 12p |
| Abstrakt: |
The stress sensitivity characteristics of tight sand reservoir and their impact on the productivity are studied under the scanning electron microscopy (SEM), the casting thin sections, and the stress sensitivity experiment. The results indicate that the damage model of porosity and the permeability can be described as "Falling quickly then falling slowly" with the decrease of pore pressure and the increase of overlying pressure. The relative loss rate of porosity is from 4.88 to 16.48%, and the permeability has stronger stress sensitivity with 63.86 ~ 86.14%. The porosity sensitivity is connected with the microscopic pore structure of the porosity, pore size, and rock particles compressive capacity, and permeability is mainly affected by the pore distribution and pore size distribution. The new productivity equation of tight reservoir in which the stress sensitivity of the porosity and the permeability are considered shows the following: As the reservoir physical properties become worse, the stronger the rock sensitivity, the higher the degree of impact on the production; at the same time, the properties and its degree of impact on the productivity show a linear relationship within a certain range. This study enriches the productivity calculating methods in tight gas reservoirs and provides the theoretical guidance for the optimizations of the development and producing pressure differential. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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