Open AccessThe characterization method and effectiveness research for crack parameters in Tight Sandstone Reservoir
Author(s) -
Yuan Long,
Hu-song Ling,
Qian Wang,
Wu Siyi,
Cuiping Han,
Yu Bin,
Chao Cai,
Fan Yang
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/780/4/042057
Subject(s) - fracture mechanics , modulus , crack closure , permeability (electromagnetism) , geology , tarim basin , crack growth resistance curve , geotechnical engineering , materials science , structural engineering , engineering , composite material , membrane , biology , genetics , paleontology
When natural cracks in oil & gas development of tight sandstone remain valid, effective crack degree is the decisive factor of reservoir enrichment and high production. Taking the reservoir of the Bashijiqike Formation in Kuqa depression, Tarim Basin as an example, the crack parameters were characterized by a mathematical model and algorithm, which lays a theoretical foundation for the study of crack validity. According to crack parameters processed by electric imaging and static modulus date of rock mechanics, control conditions that constrain crack development such as crack permeability, the normal stress on crack surface and the angle between maximum principal stress and crack strike were obtained. In addition, quantitative expressions between constraints on crack development and productivity were established and the main control factors of fracture validity were confirmed. In the end, the crack development degree and effectiveness were comprehensively evaluated.