Journal of Petroleum & Environmental Biotechnology

Experimental investigation of non-linear flows in artificial multi-scale frac-vuggy media

3^rd World Congress on Petroleum Engineering and Natural Gas Recovery

July 20-21, 2018 Sydney, Australia

Yang Yang

Research Institute of Petroleum Exploration and Development, China

Scientific Tracks Abstracts: J Pet Environ Biotechnol

Abstract:

The size of the fractures and vugs ranges from micron scale to centimeter scale in frac-vuggy reservoir and there is almost no flow in the rock matrix. Due to the multi-scale of media, inertial coefficient is a key parameter to predict the correct production performances and behaviour of frac-vuggy reservoirs. This paper introduced the process of making multi-scale fracvuggy media and will study the inertial coefficient of Forchheimer equation and its effect on oil-water two-phase flow in the media. The experimental results of flow law showed that if flow rate is constant, the existence of nonlinear flows for single water phase is determined by the fracture width and filling degree and the effect of the vug can be ignored. However, for oil-water two-phase flows, the fracture and vug both play an important role. Meanwhile, based on rescaled range analysis (R/S), a mathematical model of judging non-linear flow is proposed. The receiver operating characteristic (ROC) curve showed that it can accurately determine the flow law for oil-water two-phase flow. Through the analysis of the experimental data of non-linear flow, this paper proposed a modified Geertsma�??s empirical expression of inertial coefficient which is a function of wetting phase saturation, fracture width, vug diameter, fracture porosity, vug porosity and total permeability. It is more suitable for multi-scale frac-vuggy media than previous literatures reports. This study showed the no linear flows and oil-water relative flow capacity in unconsolidated frac-vuggy media. They are both important in frac-vuggy reservoir numerical simulation.
Recent Publications
�?� Chukwudozie C P, Tyagi M, Sears S O, et al. (2012) Prediction of non-Darcy coefficients for inertial flows through the castle gate sandstone using image-based modeling. Transport in Porous Media; 95: 563-580.
�?� Salahi M B, Sedghi Asl M, Parvizi M (2015) Nonlinear flow through a packed column experiment. Journal Hydrologic Engineering; 20(9): 04015003.

Biography :

Yang Yang is a Reservoir Engineer and has studied reservoir engineering and reservoir numerical simulation.

E-mail: lomen@petrochina.com.cn