The Experts below are selected from a list of 210 Experts worldwide ranked by ideXlab platform
Min Wang - One of the best experts on this subject based on the ideXlab platform.
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Improvement and analysis of carbonate reservoir saturation model
Xinan Shiyou Daxue Xuebao Journal of Southwest Petroleum University, 2013Co-Authors: Min WangAbstract:：In order to understand the current situation of carbonate reservoir water saturation models， and to offer basic infor- mation for saturation evaluation in heterogeneous reservoir， this paper summarizes the current saturation interpretation models. According to study objects， conductive mechanism and study methods， the carbonate reservoir saturation interpretation models are divided into four types： Archie and its extended empirical saturation models， saturation models of dual and triple Porosity System based on different Porosity types， saturation models of dual and triple Porosity System based on different Porosity size， and saturation models based on effective medium theory. The conductive mechanism， assumption and application of different saturation interpretation models have been discussed. It points out that the Archie formula is concise， and always equivalent in the numerical sense after scaled by the data of experimental analysis and the triple-model will be the most conventional one that we expected currently， and based on the discussion we suggests that rock conductive mechanism， petrophysics experiment and the calculation of model parameters need further research， and that the pore network model based on digital core is an important research subject in carbonate reservoir evaluation
Yun He Su - One of the best experts on this subject based on the ideXlab platform.
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Discussion on the Disappearance of Transition Flow of Fractured Gas Reservoir with Pressure Transient Analysis
Advanced Materials Research, 2012Co-Authors: Yun He SuAbstract:In recent years, more and more fractured gas reservoirs were discovered in the world. In general, fractured gas reservoirs are defined as formation with double Porosity System, which is composed with fissure and matrix. In reservoirs with double Porosity System, only the fissure System are connected with the wellbore and have relatively high permeability, matrix rocks have very low permeability, gas can flow into the wellbore only via fissures, and the flow process be divided into the flow in fissures, transition flow and the flow in the total System. But transition flow is not found in the process of well testing, which results in misapplication of development decision support and selection in gas field development program. In this paper, the influent factors of fractured gas reservoir for estimation are studied by models of single well simulation, and the simulated results are analysis by the method of pressure transient analysis. For example: the time of pressure build-up test, production time, wellbore storage coefficient,kv/kh,the reservoir boundary, the pressure precision, the Porosity of matrix and fracture, the permeability of matrix and fracture, the thickness of formation(partial perforation),skin, water saturation etc. The results of simulation show that the disappearance of the transition flow is caused by many factors, which include that the time of pressure build-up test is short, production time is not sufficiently long, ,the vertical permeability is much larger than the horizontal permeability and the formation is perforated partially, the time of the reservoir boundary for pressure is short than the transition flow, the Porosity of matrix is close to the Porosity of fracture, the permeability of matrix much smaller than the fracture permeability, the pressure precision is low. The transition flow is not affected by the skin, the wellbore storage coefficient and water saturation, which cover up the radial flow in fissure System.
Zhangxin Chen - One of the best experts on this subject based on the ideXlab platform.
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Semi-Analytical Solutions for a Partially Penetrated Well with Wellbore Storage and Skin Effects in a Double-Porosity System with a Gas Cap
Transport in Porous Media, 2013Co-Authors: Morteza Dejam, Zhangxin ChenAbstract:We have studied the effect of a constant top pressure on the pressure transient analysis of a partially penetrated well in an infinite-acting fractured reservoir with wellbore storage and skin factor effects. Semi-analytical solutions of a two-dimensional diffusivity equation have been obtained by using successive applications of the Laplace and modified finite Fourier sine transforms. Both pseudo-steady-state and transient exchanges between the matrix and the fractures have been considered. Solutions are presented that can be used to generate type curves for pressure transient analysis or can be used as a forward model in parameter estimation. The presented analysis has applications in well testing of fractured aquifers and naturally fractured oil reservoirs with a gas cap.
Shengshi Dong - One of the best experts on this subject based on the ideXlab platform.
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mesoscopic prediction on the effective thermal conductivity of unsaturated clayey soils with double Porosity System
International Journal of Heat and Mass Transfer, 2019Co-Authors: Yinkang Zhou, Anh Minh Tang, Chenglong Duan, Shengshi DongAbstract:Abstract The effect of water distribution on heat conduction in unsaturated structural clayey soils with double Porosity System is investigated in the present study. A dual-Porosity model consisting of intra-aggregate and inter-aggregate pores is developed to describe the water distribution within intra-aggregate and inter-aggregate pores. Heat transfer using this model is then numerically simulated to determine the soil effective thermal conductivity. The obtained values are compared with available experimental data. The results show that the model can predict the accurate soil thermal conductivity values at various water contents and densities. On one hand, the model shows a higher soil thermal conductivity when water content and/or dry density are higher. On the other hand, the model shows an effect of water distribution on the soil thermal conductivity; this later is higher when water is preferentially distributed within aggregates than between aggregates. In addition, the model can give a direct visualization of heat transfer mechanisms in unsaturated clayey soils with double Porosity System. In fact, heat conduction is dominant in the wet region of the dual-Porosity space. This study provides both a useful predictive model of thermal conductivity and a better understanding on the physical mechanism of heat conduction in unsaturated structural clayey soils or other multiphase media with double Porosity System.
Mehdi Zeidouni - One of the best experts on this subject based on the ideXlab platform.
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Unconventional multi-fractured analytical solution using dual Porosity model
Journal of Natural Gas Science and Engineering, 2017Co-Authors: Foad Haeri, Mohammad Izadi, Mehdi ZeidouniAbstract:Abstract Five-region linear flow System proved to be a useful model to reproduce the flow behavior for multi-fractured horizontal wells in shale reservoirs. In earlier developments, the model was assumed single-Porosity throughout all five regions. However, assumption of single Porosity System for stimulated region may promote errors in pressure transient analysis. So by adopting the existing mathematical models for naturally fractured reservoirs (dual-Porosity System), one can apply the dual-Porosity nature of flow in the stimulated reservoir volume (SRV). In this study the analytical solution for single-Porosity model is reproduced and compared with numerical solution. Then the five-region model of previous studies is modified by implementing the dual Porosity behavior in Laplace domain and compared to single-Porosity solution using the same reservoir properties. Furthermore, a series of type-curves is constructed in this study using dimensionless properties, such as matrix-fracture capacity ratio and storativity ratio, hydraulic fracture conductivity, and hydraulic fracture half-length. Theses curves could provide valuable information to characterize the multi-fractured complex Systems.