Exam 1 Solution - Exam 1 — PE3123 September 24, 2009....

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Unformatted text preview: Exam 1 — PE3123 September 24, 2009. 9.00 am to 10.15 am Please be neat Utilize the space at the back of the answer sheets if you need more space Label all diagrams and use the appropriate nomenclature for any equation you use :F-‘SNNH There are 5 questions 1. Draw and label 5 commonly occurring hydrocarbons which also have a propyl group in their molecular structure. Out of the 5 chosen hydrocarbons, one should be an aromatic and one should be a cycloalkane. (15 points) 2. Deep sea divers often encounter a painful condition called ‘Decompression sickness' 'or ‘Bends' as they return to the surface rapidly. The main reason is due to the appearance of bubbles of dissOlved gas within the bloodstream. Illustrate this phenomenon on the appropriate P-T and P-V diagram. (10 points) Blood remains A liq/coal but 345 \loulpbléc' Owl '0’} «the, Have/«Ml phase it :5 also a mutil— oomponmk mixture '. ’l/ V 3. Describe the phenomenon of condensate dropout and theimplications for gas flow within the reservoir. Use appropriately labeled diagrams to illustrate this effect. (5+5 points) 4. The figure below shows the variations with respect to depth of the initial producing gas-oil ratio from different sections of a reservoir. There are 4 sampling points. 49% gene mesa proflutfimm (7,06 I; ’mwfiaee 'g‘m ale-eel" En 1!. 'ml Preduc l.er One/Lima id Re: to. set/8TB ‘1 - ‘ \ ~ 00 50H 57‘s (Al/"UN can kg “infill «Inf vol/rifle W‘s ’ a. Classify the fluid type at each sample depth. Justify your answer. Include arguments to justify why these are the fluid type combinations you would expect to see. (20 points) b. Draw a line representing the C7+ mole fraction variations with depth on the same chart indicating the regions of higher and lower C7+ mole percentages (10 points) c. What are the reasons for the observed change in the initial producing GOR with depth? (5 points) Ham/16K moleculu 50H’lé Wk «6/ Wm OQMZ .d. If you initiate production from this reservoir from a depth of 10250 feet to 10600 feet, what would the production GOR profile look like with time? Use a ' chart to illustrate this. Mark the position of a production GOR of 5700 scf/STB on the chart. (5+10 points) . C . oer'fMfi 6k wmpoéi-hvml @me w Eda (ignore «we (Mo/lac in fw/ Prodvtbq'l)?” (wofi 4% twin dawn. &, (I‘m, ((96NOW {5 0L ‘L’wO’FLWSe Qfiéfl/Oir. ' “ ' ( :r '4 ‘5 1* .‘JC (W5 Wanamj a jaé dam j: I [ADM] Mow «L AW’ (’1, Wflg ‘mH’faflj M 0” astng [Jr “5 now ‘quw 4% (pd/b Me, 370m (7- 9; “ML Prowl—Hi 01A éw (L m f?!) AIL/4.15 Endwsa. ~ r MAW/2Y1 @mharji} 4m (,nHre mean/our 16 1F ‘3; weflj W 0” \9écau5t jab zhows WWW, \ “\“Umé OJf Mae/(WW C(hté +0 \05 $5404.“ij in 666 whdewalre. W 5 W6, ’ aw WWWL ‘ ‘ vmwm, Wad Wle 0'“ 5100 90%“) W *6 w you were Frodu ting (krom 0N3 «Fo‘mV (A)ka Mora/we zhomv a vMue (0+ 51190 6w Mm WOAWW mm mm Mam,th 6mm 60L (ATOM A (n! Ofsz/ QOK aummmmmwmmanmmmmmmmgmwmmmummmmmmn GOR as observed for about 1000 different fluid samples. Indicate if the API gravity can be used a fluid type indicator. Why or why not? (15 points) API gravity, Stockwtaak aii $olutmn gee-c1! name at; laser” act/STE (W ij ji‘fen Got miwflhe 5647(jm’ 01L ...
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Exam 1 Solution - Exam 1 — PE3123 September 24, 2009....

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