Establishment and Application of Rock Mechanical Parameter Profile to Tight Reservoirs in Yongjin Oilfield
In order to study the fracability evaluation method for low-permeability tight reservoirs,experiments were conducted on six core samples from Well Y301 and Well Y3 in the Yongjin oilfield,Shawan sag,Junggar basin,and the parameters such as rock mineral compo-sition,porosity,stress-strain curves,P-wave velocity,and S-wave velocity were obtained.The experiment results agreed well with logging data,and an empirical rock mechanical model was established for the study area.Meanwhile,based on the equivalent medium model,a new model considering mineral composition and pore structure characteristics was developed for calculating rock brittleness index.Then,a method for constructing the rock mechanical parameter profile of low-permeability tight reservoirs based on logging data was established and applied in Well Y301.The application results show that the Qigu formation in Well Y301 has good fracability,which lays a foundation for the comprehensive evaluation of fracability of tight sandstone reservoirs.
Junggar basinShawan sagQigu formationtight reservoirrock mechanicsequivalent medium modelbrittleness indexfraca-bility
NETL
NSTL
万方数据
维普
