What makes a good reservoir rock?

Good reservoir rocks, by implication, must possess high porosity and permeability. A high proportion of open pore spaces enhances the capacity of a reservoir to…

What kind of rock is good for reservoir?

sedimentary rocks

All types of rock (igneous, sedimentary, metamorphic) can act as reservoir rocks if it can accommodate and drain hydrocarbons. Reservoir rocks around the world is dominated by sedimentary rocks because generally it has primary porosity.

What are traits of a reservoir rock?

According to Society of Petroleum Engineers Glossary, a reservoir rock is a rock containing porosity, permeability, sufficient hydrocarbon accumulation and a sealing mechanism to form a reservoir from which commercial flows of hydrocarbons can be produced.

What type of rock would make the best oil reservoir?

Sandstone would most likely be the best oil reservoir.

Why is limestone a good reservoir rock?

If you are referring to oil reservoirs then limestones (carbonates) contain >60% of the world’s hydrocarbon reserves; therefore limestones make very effective reservoir rocks. A good reservoir rock is one that contains significant porosity and permeability to store the hydrocarbons and allow them to flow.

What should be the main characteristics of a good underground reservoir?

Underground reservoirs are geological structures that have unique features. There is a porous medium having some degree of permeability. The porosity allows natural gas to be contained within the medium. The permeability allows the gas to move from point to point within the medium.

What is a good permeability for a reservoir?

100 to 500 md

Commonly, permeability in the range of 100 to 500 md is a reasonable value for a petroleum reservoir rock. Fractures have infinite permeability. The units in which permeability is typically expressed are the darcy (d) and millidarcy (md).

What is good porosity in reservoir rock?

Almost all hydrocarbon reservoirs are composed of sedimentary rocks in which porosity values generally vary from 10 to 40% in sandstones and from 5 to 25% in carbonates.

What is good permeability?

The effective permeability is defined as an average permeability of all n layers of an n-layer fabric mat across the thickness direction such that the relationship between the flow rate and the pressure gradient can be described by an hypothetical one-layer fabric with the same thickness.

What are the characteristics of a good petroleum reservoir rock and cap rock?

Whereas a good reservoir rock is expected to have good porosity and permeability, a cap rock should have very low porosity and permeability. Without a cap rock, hydrocarbon fluids will continue migrating upwards from the source rock, to the reservoir rock and upwards until they get to the surface.

What is the most important physical characteristics of reservoir?

What is the most important physical characteristic of a reservoir? Explanation: The main function of a reservoir is to store water and thus to stabilize the flow of water therefore, the most important physical characteristic is its storage capacity. It is determined from the contour maps of the area.

What are reservoir fluid properties?

Petroleum reservoirs may contain any of the three fluid phases—water (brine), oil, or gas. The initial distribution of phases depends on depth, temperature, pressure, composition, historical migration, type of geological trap, and reservoir heterogeneity (that is, varying rock properties).

What are the three producing characteristics that can be used to determine reservoir fluid type?

Laboratory analysis is our primary method for determining and quantifying fluid type, but production information such as initial production gas-oil ratio (GOR), gravity of the stock-tank liquid, and the color of the stock-tank liquid are also useful indicators.

How are reservoirs classified?

Reservoir planned and designed keeping more than one purpose in view is called Multi purpose reservoir. For example a reservoir designed to protect the downstream areas from floods and also to conserve water for irrigation, water-supply, hydroelectric purpose etc. shall be called a Multi-purpose reservoir.

What does a reservoir engineer do?

Reservoir engineers estimate how much oil or gas can be recovered from underground deposits, known as reservoirs. They study reservoirs’ characteristics and determine which methods will get the most oil or gas out of the reservoirs.

How do I become a good reservoir engineer?

The qualifications you need to become a reservoir engineer are a bachelor’s degree in geology, engineering, petroleum engineering, or a relevant field of study, and at least two years of experience in the oil and gas industry, preferably with hands-on training in reservoir engineering.

What is reservoir performance?

Reservoir performance affects the economic viability of a play or prospect and is a function of reservoir system quality. Performance is expressed by. Initial production rate and production rate decline over time. The percentage of hydrocarbon recovered from the hydrocarbon originally in place (recovery factor)

What is reservoir management?

Reservoir management is often defined as the allocation of resources to optimize hydrocarbon recovery from a reservoir while minimizing capital investments and operating expenses [Wiggins and Startzman, 1990; Satter, et al., 1994; Al-Hussainy and Humphreys, 1996; Thakur, 1996].

Why is reservoir management important?

The purpose of reservoir management is to control operations to obtain the maximum possible economic recovery from a reservoir on the basis of facts, information, and knowledge. Before 1970, many considered reservoir engineering to be of major technical importance in reservoir management.

What does reservoir development mean?

In other words, reservoir development planning refers to strategies that begin with the exploration and appraisal well phase and end with the abandonment phase of a particular field to establish the course of action during the productive life of the asset.

What is a reservoir personnel?

Reservoir engineers estimate how much oil or gas can be recovered from underground deposits, known as reservoirs. They study reservoirs characteristics and determine which methods will get the most oil or gas out of the reservoirs.

How does reservoir simulation help in reservoir management?

Reservoir simulation is an area of reservoir engineering in which computer models are used to predict the flow of fluids (typically, oil, water, and gas) through porous media.

What is integrated reservoir management?

Integrated reservoir management is basically a way of combining complementary approaches and techniques such as reservoir characterization, use of complex well architecture, special core analysis design of recovery processes, reservoir monitoring and reservoir simulation, and creating a positive synergy between them.

What is reservoir characterization and of what importance is it in petroleum data management?

The first aim of reservoir characterization is to produce a geological model that honors the available data and can be used to predict the distribution of porosity, permeability, and fluids throughout the field (Geehan and Pearce, 1994).

What are the different ways a reservoir can be modeled?

The two most common types of reservoir fluid models are black-oil models and compositional models. The black-oil models are based on the assumptions that the saturated phase properties of two hydrocarbon phases (oil and gas) depend on pressure only.

What is the importance of rock and fluid characterization?

High-quality rock and fluid data are critical for reliable geological modeling, reservoir-engineering calculations, and performance predictions by use of reservoir simulators and for subsequent economic analysis.