Fracturing Cores

What Do You Mean By Fracturing Cores?

Fracturing core samples, also known as core samples or core plugs, are cylindrical samples of rock retrieved from the subsurface during drilling operations. These samples provide invaluable insights into the composition, porosity/consistency, permeability, and mechanical properties of the reservoir rock. It refers to the fractures that occur due to drilling, coring, or handling. In this blog, we will talk about the significance and category of fracturing cores in detail. 

Type Of Fracturing Cores:

Natural Fracture:

A natural fracture is defined as any cored fracture that existed in a volume of rock prior to the initiation of drilling. The cracks or breakage surfaces in rocks that are not caused by foliation in metamorphic rock are called natural fractures. They are caused by stress in the formation, usually from tectonic forces such as folds and faults. Natural fractures are more common in carbonate rocks and occur in preferential directions, determined by the direction of regional stress. Most of the world’s reservoirs are naturally fractured and contain significant amounts of petroleum reserves, hydrocarbons, crude oil or natural gas, and widely available water.

Induced Fractures:

Fractures induced in the core are fractures that develop during drilling, coring, or subsequent handling. Such fractures can be grouped into three distinct categories.

Drilling:

Induced fractures propagate in the rock ahead of the bit during drilling. Because they may extend laterally beyond the column to be drilled they may be present in the borehole wall. Coring-induced fractures can develop anywhere within the core barrel. However, they generally form near the bit and before, or at, the scribe knives. 

Coring:

Induced fractures that form at specific locations within the barrel can possess distinctive characteristics. 

Handling:

Induced fractures form primarily during the removal of the core from the core barrel, or during the plugging and slabbing process. Such fractures also may be induced when the core is transported or when core lengths are sized to permit boxing for shipment and storage. Handling-induced fractures include desiccation cracks that may develop during core storage.

Where Are Fracturing Cores Used?

Fracturing cores are used in extracting oil, natural gas, geothermal energy, and more from the core. It is commonly used in the following industries:

Oil and Gas Exploration and Production:

Fracturing is extensively used in the oil and gas industry to extract hydrocarbons from unconventional reservoirs such as shale core formations, tight sandstone core formations, and coalbed methane deposits. It helps to enhance the productivity of wells by creating fractures in the rock formations, allowing oil or natural gas to flow more freely to the surface.

Geothermal Energy:

Fracturing techniques can also be applied in the geothermal energy industry to increase the absorbency level of hot rock formations, facilitating the extraction of heat for electricity generation or direct use in heating systems.

Mining:

In mining operations,  fracturing techniques, known as “block caving,” are sometimes used to break up large sections of ore bodies, allowing for easier extraction of minerals such as copper, gold, and diamonds.

Civil Engineering and Construction:

Fracturing can be used in civil engineering projects, such as the construction of tunnels, dams, and underground storage facilities. It can help to create fractures in rock formations to facilitate excavation and construction activities.

Our Take On Fracturing Cores:

Today fracturing cores are widely used in many industries to extract oil and natural gas, electricity, copper, minerals, and more. While fracturing has various applications across different industries, it is most commonly associated with the oil and gas sector due to its widespread use in unconventional hydrocarbon extraction. If you are looking for fracturing cores for your petroleum research in Texas, feel free to contact us at (979) 406-0627. We sell all kinds of core samples in Texas – sandstone cores, shale cores, carbonate cores, and conductivity cores.