please answer the questions clearly. First picture cantains the questions and th
ID: 293381 • Letter: P
Question
please answer the questions clearly. First picture cantains the questions and the last two are where the answers should be written on.
You are provided with a geological map of NW Scotland (Map B) but some of the data is missing. The area covered by the map consists of a series of sedimentary layers that have been folded into a syncline and anticline pair. In the northern part of the area there is an unconformity 3a. There are two blanks areas on your geological map. Fill in these blanks areas by: i) Marking the geological boundaries within the two areas, and; ii) Adding the missing dip and direction data (below) at points 1, 2, 3 and 4 marked on the map. Missing dip and dip direction data: Point 1: 25/340 Point 2: 25/355 Point 3: 12/200 Point 4: 28/005 3b. Draw a geological cross-section, along the line X-Y on your map, using the topographic base provided on page 7. Note that if the strike is oblique to the cross-section, you must use apparent dip rather than true dip. 3c. Look at the lithostratigraphy key given on your map and mark two potential petroleum reservoirs on your geological cross-section. NOTE: Sandstone generally make good reservoirs and mudstones or shales generally make good cap rocks/seals. 4c. Assuming that your potential reservoirs are full, mark any spill points on your geological cross-section. A spill point is the structurally lowest point in a hydrocarbon trap that can retain hydrocarbons. Once a trap has been filled to its spill point, further storage or retention of hydrocarbons will not occur for lack of reservoir space within that trap. The hydrocarbons spill or leak out, and they continue to migrate until they are trapped elsewhere.Explanation / Answer
3a. Map below shows the complete geological boundaries and named according to given legend with missing dip and dip direction for four points.
3b. The geological cross section along X-Y is provided below.
3c. The above geological cross section show two potential petroleum reservoirs and marked as point A and B. These sandstone reservoirs are capped by mudstone 1.
4c. Reservoir point A and B from sandstone are chosen based on the structurally lowest point in the sandstone which forms one syncline and one anticline. Or we can say one syncline and a half syncline. The hydrocarbons are accumulated in these lowest points and can be easily extracted from the suggested point A and B.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.