Abstract
In the process of water injection in oil field, the fault will affect the seepage field and stress field of the formation, which leads to the deformation and destruction of the formation. Therefore, more casing damage wells are found around the fault. In order to study the influence of fault on the formation in the process of water injection, a reservoir model including one closed fault was established based on the fluid-solid coupling method and the characteristics of seepage field and stress field near the fault were studied. The results show that the closed fault will obstruct the flow path of the fluid in the formation, resulting in the independence of the seepage and stress characteristics on both sides of the fault. The pore pressure and formation stress of injection side of fault are higher than that of production side and bigger shear stress is observed at the junction between the fault and the permeable stratum.
Highlights
Water injection is a common method to maintain formation pressure and improve oil recovery
Closed fault will cut off the flow path of the fluid and influence the seepage field of the fluid
The Seepage and Stress Field near the Fault shown in the figure, the biggest stress difference has increased to 1.633 MPa
Summary
Water injection is a common method to maintain formation pressure and improve oil recovery. A series of studies have been carried out on the casing damage of oil field. In order to study the influence of fault on casing damage, the seepage and stress distribution near the fault should be determined. The mathematical model of the stress and strain field of fluid-solid coupling theory of the continuous medium under the condition of vertical compression and permeability change is as follows: 3KV (σ e ) + G (σ e ) ∂εV. In order to study the influence of fault on the seepage field, a contrast model without fault is established. Equation 3 and 4 describe the relationship of stress and seepage:
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: American Journal of Engineering and Applied Sciences
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
