1. n. [Geology] A mappable subdivision of a stratigraphic unit that can be distinguished by its facies or lithology—the texture, mineralogy, grain size, and the depositional environment that produced it. See: depositional environment, depositional system, stratigraphy.

How do you describe Lithofacy?

A lithofacies is a lateral mappable subdivision of a designated stratigraphic unit, distinguished from adjacent subdivisions on the basis of lithology, including all mineralogic and petrographic characteristics and those paleontologic characteristics that influence the appearance, composition, or texture of the rock ( …

What is a lithofacies in geology?

Lithofacies are simply different types of clastic or chemical sediments (and their lithified rock equivalents) produced by gravity, water, ice, or wind in sedimentary environments.

What are the three main types of depositional environments?

There are 3 kinds of depositional environments, they are continental, marginal marine, and marine environments. Each environments have certain characteristic which make each of them different than others.

What are the different sedimentary environments?

Geologists recognize five common terrestrial sedimentary environments: stream, lake, desert, glacial, and volcanic.

What are common depositional environments?

Types of depositional environments

  • Alluvial – type of Fluvial deposit.
  • Aeolian – Processes due to wind activity.
  • Fluvial – processes due to moving water, mainly streams.
  • Lacustrine – processes due to moving water, mainly lakes.

How do you identify lithology?

Lithology is also determined from the logs, because each main reservoir lithology has characteristic responses. Frequently, lithologies are derived by pattern recognition of the GR-, density-, and neutron-log responses. Some subsequent delineation wells are likely to be cored over the entire of the reservoir interval.

What is the difference between geology and lithology?

The main difference between lithology and geology is that lithology describes the properties of a unit of rock, whereas geology describes the occurrence and changing of rock on Earth’s crust over a long time period.

What are the different types of lithofacies?

Facies Code Lithofacies Sedimentary structures Interpretation Gms massive, matrix supported gravel none debris flow deposits Gm massive or crudely bedded gravel horizontal bedding, imbrication longitudinal bars, lag deposits, sieve deposits Gt gravel, stratified

How are lithofacies classified in oil sands mining and in situ projects?

In oil sands mining and in situ projects, lithofacies are subdivided in order that the resource quality of the sediments can be evaluated. Lithofacies are classified from core on the basis of: 1. whether the lithofacies are considered reservoir or nonreservoir, 2. bitumen storage capacity (porosity and saturation), and 3.

What is the seven-division lithofacies scheme?

A seven-division lithofacies scheme is presented ( Fig. 14.5 ), which employs a similar classification to other published lithofacies schemes (e.g., Hubbard et al., 2011; Su et al., 2013 ). This lithofacies classification can be used for both in situ and mining recovery technology to calculate in-place resource volumes.

How is the lithofacies framework model established?

Under the distribution model direction, the volcanic lithofacies recognition, and presentation results, the lithofacies framework model is established through random or deterministic modeling methods (Fig. 4.7 ). The random modeling method is often applied at the early reservoir development stage when drilling data is not abundant.