Production analysis of multifractured horizontal wells with composite models: Influence of complex heterogeneity

Research progress and challenges on production forecast techniques of fractured horizontal wells in shale oil reservoirs

“…The tri-linear flow model (Ozkan et al, 2009;Brown et al, 2011) was the classic linear model to analyze production performance of MFHW, which was extended to multi regions considering more detail outer boundaries and simulate more complex flows (Yuan et al, 2015;Ji et al, 2017). Recently, to describe the flow behavior of reservoir beyond the fracture tip, (Yao et al, 2020), has proposed a composite model combining multi-linear model and radial flow model, where reservoir was divided into multiple subsystems, each of which is subdivided into zones, and the flow within each zone can be linear, radial, or continuous source/sink flow. Semi-analytical method can be utilized to accurately account for the effects of reservoir heterogeneity and different types of boundaries on productivity when predicting the productivity of MFHW traversed by two or three dimensional hydraulic fractures at any arbitrary angle.…”

“…The estimated amount of technically recoverable continental shale oil resources in China was about 60 × 10 8 t by prediction (Zou et al, 2013). However, it is challenging to evaluate the production of shale because of the heterogeneity of reservoir, complex fracture network produced by hydraulic fracturing, and the strong non-linearity of low permeability shale oil flow (Yao et al, 2020).…”

Semi-Analytical Reservoir Modeling of Non-Linear Gas Diffusion with Gas Desorption Applied to the Horn River Basin Shale Gas Play, British Columbia (Canada)

“…As a result, the non-linearity of the system due to its pressure-dependent gas properties can be linearized, and the equation can be solved analytically. Recent works have mainly focused on modeling the performance of hydraulic fracturing wells in tight and shale reservoirs [32][33][34][35]. Few studies have integrated shale gas desorption into reservoir-scale modeling [36], and fundamental research on the effect of gas desorption needs to be conducted and validated.…”

Green’s function-based type curves for multi-fractured horizontal gas wells in unconventional reservoirs

“…Yao et al [19] developed type curves capable to incorporate stress-dependent fractures and heterogeneity within the matrix. In subsequent work, Yao et al [20] adopted a composite model approach to account for the degree of heterogeneity in MFWHs and provided a new set of type curves capable to estimate reservoir and fracture properties. Recently, Wu et al [21] used percolation theory to derive a new set of type curves for fractured horizontal wells assuming a rectangular stimulated reservoir volume.…”