What is a good source rock for hydrocarbons?

Source rocks are commonly shales and lime mudstones, which contain significant amount of organic matter [2]. A petroleum source rock is defined as any rock that has the capability to generate and expel enough hydrocarbons to form an accumulation of oil or gas.

What makes a good hydrocarbon reservoir?

Hydrocarbon reservoirs are rocks that have: Sufficient porosity (void space) to store commercial volumes of hydrocarbons. Sufficient permeability (fluid flow capability) to be able to deliver the hydrocarbons to extraction wells.

Which type of rock is important in hydrocarbon exploration?

This is commonly a porous sandstone or limestone. The oil collects in the pores within the rock although open fractures within non-porous rocks (e.g. fractured granite) may also store hydrocarbons. The reservoir must also be permeable so that the hydrocarbons will flow to surface during production.

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…

Is source rock permeable?

Source rock is impermeable. Kerogen in the source rock is solid which is converted to liquid or gas while forming petroleum. Thus when petroleum is generated from kerogen extra volume of hydrocarbon is generated in the pore creating extra pressure within the pore.

What is source rock and reservoir rock?

• A rock that Is capable of generating or that had generated movable. quantities of hydrocarbons is called as source rock. • Example-Shale and limestone. Shale can act as both source rock (for. petroleum and natural gas) and reservoir rock (for shale oil and shale gas).

What is a good permeability for a reservoir?

The typical reservoir permeability range of 0.001 md (1 μD) to 0.1 md (100 μD) is considered.

What is permeability in reservoir?

Effective permeability is the ability to preferentially flow or transmit a particular fluid through a rock when other immiscible fluids are present in the reservoir (for example, effective permeability of gas in a gas-water reservoir). If a single fluid is present in a rock, its relative permeability is 1.0.

Which is the best source rock?

Source rocks are usually shales or limestones (sedimentary rocks). To be a productive source rock, the rock needs time to mature (time to form the oil and/or gas) and the hydrocarbons need to be able to migrate to a reservoir or seep.

When hydrocarbons accumulate in a reservoir?

The cap rock seals the top and sides so that the hydrocarbons are trapped in the reservoir, while water often seals the bottom. For a reservoir to exist, oil and gas from the source rock must migrate into the reservoir rock, which takes millions of years.

Which Rock is a good reservoir rock?

A sponge is a good visual of a reservoir rock. Good porosity as well as good permeability : Sandstone and carbonates are good reservoir rocks. Good porosity but not permeability : Shale, is not considered good reservoir.

What are the key properties of hydrocarbon reservoirs?

Key properties of hydrocarbon reservoirs are porosity and permeability. Porosity is the pore space, or voids, within a rock and generally filled with connate water, but contains oil or gas within a field. Porosity is generally expressed as a percentage of the rock.

What is the permeability of a reservoir rock?

Permeability in reservoir rocks may range from 0.1 mD to more than 10 D. 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 is the meaning of reservoir porosity?

Reservoir Porosity. Porosity is the void space in a rock that can store the fluids. It is measured as either a volume percentage or a fraction (expressed as a decimal). In the subsurface this volume may be filled with petroleum (oil and gas), water, a range of non hydrocarbon gasses (CO2, H2S, N2), or some combination of these.