What is lithofacies map?

Lithofacies maps show the areal variation in the depositional patterns that make up each genetic sequence within the reservoir interval. The method for constructing lithofacies maps involves extrapolating the lithofacies from the wells into the gaps between the wells.

What are lithofacies?

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 does an isopach map show?

Isopach maps are contour maps that indicate the thickness of rock layers and layering of subsurface materials.

What is structural mapping?

Structural mapping is the identification and characterization of structural expression. Structures include faults, folds, synclines and anticlines and lineaments. Understanding structures is the key to interpreting crustal movements that have shaped the present terrain.

How do you identify a depositional environment?

To identify depositional environments, geologists, like crime scene investigators, look for clues. Detectives may seek fingerprints and bloodstains to identify a culprit. Geologists examine grain size, composition, sorting, bed-surface marks, cross bedding, and fossils to identify a depositional environment.

What are the three main types of depositional environments?

The type of sediment indicates the environment of deposition. There are three major environments of deposition: marine, transitional and continental. 1. Marine: includes continental shelves, continental slopes, continental rises and abyssal plain.

How do I read an isopach map?

Isochore maps measure the thickness from a point on the upper surface straight down to the corresponding point on the lower surface. Isopach maps display the stratigraphic thickness between an upper and lower horizon. It is measured as the shortest distance between the two surfaces.

What does Isopachyte mean?

(ˈaɪsəʊˌpæk ) or isopachyte (ˌaɪsəʊˈpækaɪt ) noun. geology. a line on a map connecting points below which a particular rock stratum has the same thickness.

What is analogy mapping?

The basic idea of Gentner’s structure-mapping theory is that an analogy is a mapping of knowledge from one domain (the base) into another (the target) which conveys that a system of relations which holds among the base objects also holds among the target objects.

What is the difference between a topographic map and a structure map?

Its appearance is similar to that of a topographic map, but a topographic map displays elevations of the Earth’s surface and a structure map displays the elevation of a particular rock layer, generally beneath the surface.

What are 3 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 4 environments of deposition?

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.

Where can I find the definition of lithofacies?

Look up lithofacies in Wiktionary, the free dictionary. Lithofacies may refer to: A mappable subdivision of a designated stratigraphic unit, distinguished from adjacent subdivisions on the basis of lithology; a facies characterized by particular lithologic features

How do you make a lithofacies map of a well?

The method for constructing lithofacies maps involves extrapolating the lithofacies from the wells into the gaps between the wells. This is not easy, as there will be mostly vertical or near vertical well data in the field.

What is the framework of the lithofacies model?

The lithofacies framework model is established on the multilayered structural model basis and the framework model of eruption-cyclicity, edifice and massif.

Why do we use analogs in lithofacies maps?

The practice of making lithofacies maps with the help of modern analogs is an effective method for filling in the gaps in the subsurface. Modern analogs show the geometrical interrelationship of the various sedimentary bodies; they also permit the width and length of the various macroforms to be readily measured.