Abstract
At present, the main development mode of well + volume is adopted in the tight glutenite reservoir. Due to the existence of conglomerate, the seepage characteristics are more complex, and the production capacity after volume fracturing is difficult to predict. In order to solve this problem, a dual media unstable seepage model was established for matrix seepage and discrete fracture network seepage when considering the trigger pressure gradient. By considering the Poisson's ratio of stress sensitivity in an innovative way, the coupling model of permeability and stress is improved, and the production prediction model of volume fracturing horizontal well in tight glutenite reservoir based on the fluid-solid coupling effect is formed. The finite element method is used to numerically solve the model, and the fitting verification of the model is carried out; the impact of stress sensitivity, producing pressure difference, fracture length, number of fracture clusters and fracture flow capacity conductivity on productivity is analyzed,, which has certain guiding significance for the efficient development of volume fracturing in tight glutenite reservoir.
Highlights
Horizontal well productivity prediction is very important in tight reservoir development
After establishing and solving the fluid-solid coupling model, the required parameters of the model are input into COMSOL (Table 1)
In the early stage of horizontal well production, the wellbore of the horizontal well is mainly supplied from the volume fracturing region, which results in a high fracture flow capacity and fast fluid flow in the effective modification area
Summary
Horizontal well productivity prediction is very important in tight reservoir development. Taking the tight reservoir of Daqing Oilfield as the study object, Hu et al (2017) established a numerical model of production capacity based on the theory of unsteady seepage mechanics and superposition principle, which was used to calculate and analyze the production capacity of fracturing horizontal wells. For the mathematical model for the seepage field of volume fracturing horizontal wells in tight reservoirs, the definite conditions mainly include the initial formation pressure conditions, the definite pressure production. The matrix form of the equilibrium equations for the fluid-solid coupling mathematical model of porous media based on the full-coupling finite element method can be obtained as follows: M0 00 u P
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 callDisclaimer: 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.
