Open AccessSand Production Mechanism Analysis of Deep Tight Sandstone Gas Reservoir in Keshen Block
Author(s) -
Jianxun Jiang,
Xiaofan Li
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/781/2/022022
Subject(s) - geology , geotechnical engineering , research object , fracture (geology) , block (permutation group theory) , tight gas , shear (geology) , direct shear test , petroleum engineering , petrology , hydraulic fracturing , regional science , geography , geometry , mathematics
In order to provide reference and help for sand production control in deep tight sandstone gas reservoirs. Taking Keshen block as the research object, the sand production mechanism is analyzed and verified by experiments. The additional pressure difference, fracture development and reservoir reconstruction are considered. Through the establishment of rock mechanics model, hole additional pressure difference physical model experiment, acid rock test. It is concluded that the main sand production mechanism of this formation is shear failure, additional pressure difference of rock, sand production easily caused by natural fracture development, and rock strength decreases after acid fracturing. The rock strength decreases by 20%.