@Article{ee.2023.025846,
AUTHOR = {Zhiyuan Yao, Jing Sun, Dehua Liu},
TITLE = {Experimental Study on the Influence of Fracturing Fluid Retention on Shale Gas Diffusion Law},
JOURNAL = {Energy Engineering},
VOLUME = {120},
YEAR = {2023},
NUMBER = {8},
PAGES = {1853--1866},
URL = {http://www.techscience.com/energy/v120n8/52973},
ISSN = {1546-0118},
ABSTRACT = {Shale gas reservoirs have poor physical properties and a large number of micro-nano pores have been developed.
Shale gas wells have no natural productivity and need fracturing reconstruction measures to put into production.
However, the fracturing fluid will enter the reservoir space of shale matrix after fracturing and affect the production
of shale gas. At present, there is no consensus on the influence of fracturing fluid retention on gas well production.
Based on this, the paper adopts gas molecular transport analyzer to carry out experimental research on the influence
of fracturing fluid on shale gas diffusion law after entering matrix pores. The results show that: (1) Compared with
the diffusion capacity of single-phase shale gas, the diffusion capacity of shale gas decreases significantly when
fracturing fluid is present in the reservoir; (2) In the process of fracturing fluid flowback, when the water saturation
in the reservoir decreases from 50% to 0, the gas well productivity increases by about 60%. (3) When fracturing
fluid exists in the reservoir, the pore diameter has an exponential relationship with the shale gas diffusion coefficient,
and the diffusion coefficient increases exponentially with the increase of pore diameter. The research of this paper
provides theoretical basis for guiding the efficient development of shale gas wells.},
DOI = {10.32604/ee.2023.025846}
}