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The terms isopach and isopach map are incorrectly used interchangeably to describe isochores and isochore maps. Isopachs and isochores are equivalent only. Commonly, the isopachs, or contours that make up an isopach map, display the See: contour, contour interval, contour map, formation, isochore, reservoir. true vertical thickness is an isochore map. Note that in common practice, isochore maps are informally referred to as “isopach” maps.

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For the formula, use: Under Inputsclick the plus to add three horizons, these horizons will include your two depth horizons, along with your dip angle map for the top horizon.

Another error may come from working with seismic surveys and not realising that if you take a surface representing a top unit, and you substract another surface representing a bottom unit, the result is isochre isochore map, not a isopach map. The way its drawn is fine with me but how to see the contours whether projected on surface or direct subsurface projection.

And this is considering that everytime we read a vertical thickness in a well log the well was actually vertical and not deviated at all. It is very crucial for the hydrocarbon industries to document the lateral changes in the layer thickness. You are also welcomed to write some contribution! With very beautiful girls, we launch the Mumbai Escorts Service in which our Mumbai Escort Agency will present you to meet isoochore who are fully convinced of the way we isoxhore escort services in Mumbai, there are a high quality and high profile.

Both types of maps show the thickness between two mapped surfaces, but differ in how the thickness is measured. This sandy unit contains shallow marine aand fluvial facies and overlies the marine shale of the Mowry Formation. Overlaying depth isocchore contours can give a clear picture of where stratigraphic thicknesses occur in relation to structural highs.

Vertical thickness increased with increasing dip angle and when dip angle is zero the true thickness and vertical thickness are equal. Isopachs are contour lines of ioschore thickness over an area. To collect data necessary for the construction of a geologic map and cross-section of. I want to encourage continue your great job, have a nice day.


To do this, first add another base horizon into the operation, set the Property to Dip Anglethen use the formula: Using mapped horizons for the Top Frontier and Top Mowry, along with a dip angle map of the Frontier, we can create a stratigraphic thickness map for the Frontier Formation. Feedback Privacy Policy Feedback.

Isopach map

Well 2 cuts the bed where is horizontal, and therefore the vertical thickness equals the real thickness. It is measured as the shortest distance between isopaach two surfaces.

I will ensure that I bookmark your blog and will eventually come back in the foreseeable future.

Red colour indicates minimum vertical thickness, whilst purple shows maximum value. Thanks a lot for a clear explanation.

Ebrahim Basic Petroleum Technology. Unfortunately, some people interchange both terms, and too many times we can see isochore maps refered to as “isopach maps” If we would get the map from figure 2and somebody would tell us that this is a isopach map over and anticline, we could wrongly conclude that the real thickness around the hinge line of the fold is smaller than in the flanks, and we would probably think that we have in front of us as growth anticline, for example.

I have a question though, if the upper and lower bounds are non-parallel, is it safe to say that one cannot create an isopach map of the structure, because we would either be measuring a point perpendicular to the upper or lower bound, but not to both. We think you have liked this presentation. Letters can also be used as variables to simplify the formula. The real thickness of the yellow bed is constant: Thank you for the post.

This geology article is a stub. Best to correct at the wells, then interpolate. This property can be viewed in 3D as well, as an isopach draped over structure.

Isopachs, Isochores, and Isochrons. Now why we call ourself as the hub of call girls in Gurugram because we dote our job to provide best to our clients and for this we maintain a list of the best and affordable call girls in gurgaon city.


We can see that the difference between an isopach map and an isochore map is quite obvious and simple to understand. If the top and base horizons have differing dips over the course of the horizon, such as when one interval pinches out onto the underlying unit, it may be preferable to make a stratigraphic thickness calculation based on an average dip between the two horizons.

Well 1 cuts the yellow bed at a higher angle than well 3and therefore, the vertical thickness found in well 1 is larger than in well 3. The solid lines represent the structure contours of the upper surface of the sandstone and the dash lines represent its lower surface. If we consider vertical thickness in an isochore map, we can only project a given value to a single point in the surface.

Better not even to know it! There are two options for how to save the result.

Isopach and Isochore Maps – ppt video online download

You can see that it shows what you can see in the cross section: To calculate the isochron, or time interval map, subtract the top horizon time from the base horizon time. Download ppt “Isopach and Isochore Maps”.

I surprised with analysis research you focused on this into particular put up amazing. Please help me understand.

Isopach and Isochore Maps

Oil and natural gas are found in the small spaces between the grains in a sedimentary rock. Isopach maps display the stratigraphic thickness between an upper and lower horizon. Map types Sedimentology Stratigraphy Geology stubs.

I’ve tried in the past to correct an isochore map to an isopach map by multiplying by the cosine of isopacj dip. Thus, an isochore and isopach map are the same only when both the top and bottom surfaces of the layer shown are horizontal. Share buttons are a little bit lower.