A composite dual-porosity fractal model for channel-fractured horizontal wells

Wang, Wendong; Sheng, Guanglong; Yao, Wei; Gao, Hui; Wang, Kai

doi:10.1080/19942060.2017.1348992

Cited by 15 publications

(9 citation statements)

References 27 publications

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“…In turbulence modeling velocity and pressure of a fluid flow are decomposed to averaged values [ 19 ]. In [ 20 ], three different turbulence models, such as k-ε, shear stress transport (SST), and baseline models were used and the k-ε model showed compliance with the experimental data [ 20 ]. The analytical expressions were developed using integrated fluidic flow across primary hydraulic fractures, stimulated reservoir volume (SRV) and unstimulated reservoir matrices.…”

Section: Introductionmentioning

confidence: 99%

Review of Recent Metamaterial Microfluidic Sensors

Salim

Lim

2018

Sensors

169

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Metamaterial elements/arrays exhibit a sensitive response to fluids yet with a small footprint, therefore, they have been an attractive choice to realize various sensing devices when integrated with microfluidic technology. Micro-channels made from inexpensive biocompatible materials avoid any contamination from environment and require only microliter–nanoliter sample for sensing. Simple design, easy fabrication process, light weight prototype, and instant measurements are advantages as compared to conventional (optical, electrochemical and biological) sensing systems. Inkjet-printed flexible sensors find their utilization in rapidly growing wearable electronics and health-monitoring flexible devices. Adequate sensitivity and repeatability of these low profile microfluidic sensors make them a potential candidate for point-of-care testing which novice patients can use reliably. Aside from degraded sensitivity and lack of selectivity in all practical microwave chemical sensors, they require an instrument, such as vector network analyzer for measurements and not readily available as a self-sustained portable sensor. This review article presents state-of-the-art metamaterial inspired microfluidic bio/chemical sensors (passive devices ranging from gigahertz to terahertz range) with an emphasis on metamaterial sensing circuit and microfluidic detection. We also highlight challenges and strategies to cope these issues which set future directions.

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Section: Introductionmentioning

confidence: 99%

Review of Recent Metamaterial Microfluidic Sensors

Salim

Lim

2018

Sensors

169

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“…Therefore, the concept of triple-medium is applied to characterize the complex pores of such reservoirs (Ge and Wu, 1982;Wang Y. et al, 2017). Studying the seepage model of fractured-vuggy tight carbonate reservoirs requires full consideration of the nonlinear flow of matrix blocks and the stress sensitivity and fractal characteristics of a fracture system (Guo et al, 2015;Li et al, 2017;Lin and Myers, 2018;Wang W.D. et al, 2017;Zeng et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Characteristics of transient pressure performance of horizontal wells in fractured-vuggy tight fractal reservoirs considering nonlinear seepage

Jiang

Zhang

Cui

et al. 2019

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Since the classical seepage theory has limitations in characterizing the heterogeneity of fractured-vuggy tight reservoirs, well test interpretation results are not consistent with actual production by far. Based on the nonlinear percolation theory, a new nonlinear seepage equation considering the boundary layer and yield stress was derived to describe the seepage characteristics of dense matrix blocks and the stress sensitivity and fractal features of fracture systems were characterized by applying the fractal theory. Thus, the nonlinear model of a horizontal well in a fractured-vuggy tight fractal reservoir was established naturally. Then the finite element method was applied to solve the bottom hole pressure based on the processing of internal boundary conditions. After solving the model, the seepage characteristics of different models were summarized by analyzing the bottom hole pressure dynamic curves and the sensitivity analysis of multiple parameters such the nonlinear parameter and fractal index were conducted. Finally, the practicality of the model was proved through a field application. The results show that the pressure dynamic curves can be divided into nine flow stages and the increase of the nonlinear parameter will cause the intensity of the cross flow from matrix blocks to the fracture system to decrease. The fractal index is irrelevant to the intensity of the cross flow while it decides the upwarping degree of the curve at the middle and late flow stages. On the basis of the results of the field application, it can be concluded that the model fits well with actual production and the application of this model can improve the accuracy of well test interpretation.

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“…is constant, we can construct an interval valued function f (t) = [f (1) (t), f (2) (t)] in form, where f (1) (2) (t) = max{f 1 (t), f 2 (t)}. But f (t) can not be called the solution of the interval equation.…”

Section: Appedix C the Expression Forms Of Solutionsmentioning

confidence: 99%

Single Fuzzy Parameter Seepage Model of Oil and Gas Reservoir

Zhang

Shu

et al. 2019

IEEE Access

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In the process of modeling, the reservoir permeability is often regarded as a certain value in the traditional flow model of oil and gas reservoir, but most reservoir areas are uneven and complex and so this idealization will lead to a great decrease in the accuracy of the model. Given this, this paper puts forward fuzzy permeability, which makes the model more in line with the seepage situation, and then improves the accuracy of the model. At the same time, the fuzzy function theory is studied deeply and systematically. On this basis, according to the seepage law and physical property of the oil and gas reservoir, the fuzzy seepage differential equation and the fuzzy boundary value condition of the reservoir are established. Then, the solution of the fuzzy seepage problem of the oil and gas reservoir is achieved. Compared with the traditional seepage model, the fuzzy seepage model can describe the flow in the reservoir more accurately. The definition of fuzzy permeability and the construction of fuzzy seepage equation provide a new method and a novel idea for studying the seepage of the reservoir. INDEX TERMS Fuzzy permeability, fuzzy differential equation, fuzzy seepage, oil and gas reservoir.

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A composite dual-porosity fractal model for channel-fractured horizontal wells

Cited by 15 publications

References 27 publications

Review of Recent Metamaterial Microfluidic Sensors

Review of Recent Metamaterial Microfluidic Sensors

Characteristics of transient pressure performance of horizontal wells in fractured-vuggy tight fractal reservoirs considering nonlinear seepage

Single Fuzzy Parameter Seepage Model of Oil and Gas Reservoir

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