Introduction
Our regional geology team ahs developed a list of high-potential basins and the bonanza basin is high on that list. now eight blocks are up for bid in this basin.

A team of 5 people have been tasked with evaluating these eight blocks. there is a well just outside the open blocks that encountered a good reservoir and a good source rock. unfortunately the well was dry. at the well location the source interval is immature (no HC generation)

A series of maps have been generated based on the well data and a grid of 2d seismic data. some modeling of source maturation and reservoir porosity as a function of burial depth ahs also been done.

You will use these maps to decide:
which blocks merit further work leading to a bid - good
which blocks show little HC potential - bad
which blocks are in between - possible


given figure 1. an index map showing a location of the A-1 well, the seismic lines, and the open blocks. 
given figure 2. a simplified stratigraphy for the A-1 well, based on information from scouts.
given figure 3. A 2d seismic lines that passes near the A-1 well location and NNE out into the basin through block 2 and block 6


you perform a quick interpretation of the top of the potential reservoir unit on the 2d seismic lines. You use a simple relationship to convert from seismic time to depth. Figure 5 shows your results (depths in kilometers). Over the open blocks, the potential reservoir varies in depth from about 500m to 7000m.


given figure 5 top of the potential reservoir unit based on a quick interpretation of the 2d seismic lines and a simple time-to-depth relationship. (Note: this map is adequate for for a quick-look; more careful work would be required for prospection)

you have on more 'trick' to apply to this analysis. using the well information, you model how the source rock would mature as a function of depth and how the reservoir porosity would mature as a function of depth and how the reservoir porosity would decrease with depth. the results of this modelling are shown in figure 6.

given figure 6. modelling of source maturity (oil and gas generation) and reservoir porosity as a function of depth.

you have a map to the top of the reservoir but not one for the source. in the well the source is 400m deeper than the reservoir, and on the seismic these intervals do not show much thickening or thinning.

Given figure 7. map of reservoir quality (porosity) based on simple modelling. 
indicate on this map your preliminary estimate of reservoir quality. from figure 6, excellent reservoir quality is expected above a depth of 3500m. use color, shading, or or a line pattern to indicate depth above 3500m. intermediate reservoir quality is expected between 3500m and 4500m. Use a different color, shading, or line pattern to indicate this depth range. use a third color, shading, or line pattern to indicate where poor reservoir quality is expected.

given figure 8. map of source maturity (oil/gas generation) based on simple modeling.

indicate on this map your preliminary estimate of source maturity. this map is for the top of the reservoir, but we will use it by assuming the source is immmature; it does not generate oil or gas. this area would be above 3000m on this reservoir map (3400-400m). use color, shading, or a line pattern to indicate depths above 3000m where the source is immature. similarly, indicate where (1) oil and (2) gas are being generated using different colors, shadings, or line patterns

Interpreted EODs
interpreted depositional environments and inferred lithologies for the primary reservoir interval.
[there's an image of fan, salt, deep water fan sandstone and silts, and deep basin marine shales, and salt overlapping a fan, there's a mark of FWSchroeder, and AAPG logo]

Structural traps
map of potential structural traps in the bonanza basin. note the salt ridge and anticlines in the northern tier of blocks
[another map illustration containing salt supported anticline]

HC migration map
a map showing possible buoyancy driven flow paths based on the structure (shape) of the top reservoir horizon

Your task
Based on your analysis, categorize each block into "good", "bad" or "possible

Create power points and present:
1. Map of reservoir quality and source rock maturity
2. Evaluation based on the data provided
3. Best block and explain
4. Worst block and explain
5. Rank the blocks from best to worst