What are fractured reservoirs?
What are fractured reservoirs?
A fractured reservoir is one in which naturally occurring fractures either have or are predicted to have a significant effect on reservoir fluid flow in the form of (1) increased reservoir permeability, (2) increased porosity, and/or (3) increased permeability anisotropy.
What are multiphase fluids?
1. n. [Well Completions] A fluid, generally a liquid, comprising more than one phase, such as water- or oil-based liquids, solid material or gas. Multiphase fluids and their behavior are of concern in two main areas, the flow of multiphase fluids and the separation of the various phases at surface.
What is naturally fractured reservoirs?
Naturally fractured reservoirs are different from conventional (unfractured) reservoirs. They are heterogeneous in type and consist of matrix blocks separated from one another by the fracture system as shown in Figure 7–1. It means a naturally fractured reservoir is a double-porosity and double-permeability reservoir.
What is dual porosity?
1. n. [Well Testing] A rock characterized by primary porosity from original deposition and secondary porosity from some other mechanism, and in which all flow to the well effectively occurs in one porosity system, and most of the fluid is stored in the other.
What is multiphase flow in oil and gas?
1. n. [Well Testing] The simultaneous flow of more than one fluid phase through a porous medium. Most oil wells ultimately produce both oil and gas from the formation, and often produce water. Consequently, multiphase flow is common in oil wells.
Why CBM reservoir is considered as a dual porosity system?
Abstract. Coalbed methane (CBM) reservoirs are often characterized as a dual porosity system because coal is characterized by two distinct systems, namely, the matrix and the cleats. Most of the gas in a CBM reservoir is stored in the low permeability matrix, which is dominated by pores in nanometers range.
What is discrete fracture network?
A “discrete fracture network” (DFN) refers to a computational model that explicitly represents the geometrical properties of each individual fracture (e.g. orientation, size, position, shape and aperture), and the topological relationships between individual fractures and fracture sets.
What are the two types of fluid flow?
Type of Fluid Flow. Fluid flow is generally broken down into two different types of flows, laminar flow and turbulent flow.
What is multiphase flow example?
A common example of multiphase flow in industry is a fluidized bed. This device combines a solid-liquid mixture and causes it to move like a fluid. Further examples include bubbly flow in nuclear reactors, gas-particle flow in combustion reactors and fiber suspension flows within the pulp and paper industry.
What is double porosity?
The double porosity model is derived from a two-scale homogenization procedure, by considering a medium locally characterized by blocks of poroelastic Biot microporous matrix and a surrounding system of fluid-filled macropores or fractures.
How is multiphase fluid flow in porous and fractured reservoirs?
Multiphase Fluid Flow in Porous and Fractured Reservoirs discusses the process of modeling fluid flow in petroleum and natural gas reservoirs, a practice that has become increasingly complex thanks to multiple fractures in horizontal drilling and the discovery of more unconventional reservoirs and resources.
Why are there so many naturally fractured reservoirs?
Naturally fractured reservoirs exist throughout the world and represent significant amounts of oil and gas reserves, water, and other natural resources on Earth.
Which is an example of multiphase fluid flow?
It uses the black-oil model as an example for immiscible multiphase flow in porous media and shows that many other flow systems, including flow in a gas–water, liquid–gas, and water–oil system, can be derived from the general governing equations.
How many chapters are there in multiphase flow?
Then, this chapter is concluded by introducing the contents of the remaining 11 chapters. This chapter discusses fundamentals of multiphase flow through porous media. It focuses on physics and quantitative analysis of flow processes in porous media.