CHPR5521 Term Project Overview Shane Morrissy, Bruce Norris 28 February 2017Who Are We? We are both final year PhD students in flow assurance Shane • Research Areas: interfacial science, oilfield chemistry Bruce • Research Areas: multiphase flow, pipeline simulation 2The Project 3 200 MMstb 2.6 Tcf 116 MMstbProject Information • Fluid compositions of Fields A, B, C • Example phase envelopes 4 C C 0. 25. 50. 75. 100. 125. 150. 175. 200. 225. 250. 275. 300. 325. 350. 375. 400. -50. 0. 50. 100. 150. 200 Pressure / bar Temperature / degC Light Oil Light Oil Wax Curve Black Oil Black Oil Wax Curve Gas Condensate D C C D D 0. 25. 50. 75. 100. 125. 150. 175. 200. 225. 250. 275. 300. 325. 350. 375. 400. -200. -150. -100. -50. 0. 50. 100. 150. 200. 250. 300. 350. 400. 450. 500. 550. 600. Pressure / bar Temperature / degC Light Oil Light Oil Wax Curve Black Oil Black Oil Wax Curve Gas Condensate What phase diagrams look like vs. What you care about Project Information 5 Field A Field B Field C Cumulative Oil Production Water Cut Pressur e Cumulative Oil Production Water Cut Pressur e Cumulative Gas Production Water Saturation of Gas Pressure MMstb % bar MMstb % bar Tcf % bar 0 0 93 0 0 234 0 100 113 44.4 5 87 25.8 6 227 0.57 100 107 85.5 16 80 49.6 16 221 1.09 100 101 128.2 36 74 74.4 36 214 1.63 100 94 157.3 59 66 91.2 60 207 2.00 100 86 172.6 74 63 100.1 75 203 2.20 100 82 184.6 84 60 107.1 84 199 2.35 100 79 193.2 89 57 112.1 90 196 2.46 100 76 200 95 54 116.0 94 193 2.55 100 74 204 96 52 118.3 96 191 2.60 100 73 • Reservoir production profilesAssessment Criteria Golden Rule: There is no right answer, only ones you can justify. The following assessment criteria are designed to reflect that a well presented and critically reasoned argument (in the form of your term report) are central to being an engineer. Reports are how we communicate ideas. 6Report Breakdown 7 Executive Summary This technical report should be accompanied by a one-page (strict limit) executive summary, which conveys the most important design recommendations. The summary should not contain excessive technical jargon or complex analyses; it should concisely explain the primary design choices that would be appropriate for a non-technical audience. Section A: Production Network This content must address the following five design questions: 1. What is the proposed production strategy for the oil and gas, including any topsides facilities and pipeline network? 2. Provide details on the expected flow regime in each tie-back. Are any pipe sections operating in or near a slugging regime (either terrain-induced or hydrodynamic)? 3. What are the steady-state fluid (gas, oil, water) flow rates of the tie-back(s)? 4. What are the steady-state pressure drop profiles in the tie-back(s)? 5. What are the expected temperature profiles for the tieback(s)? Section B: Gas Hydrate Thermodynamics This content must address the following three design questions: 1. Where in the system are hydrates stable during steady-state flow? 2. What is the expected steady-state hydrate growth rate for each pipeline? Describe the inherent risk in operating the pipeline(s) without any hydrate solution. 3. What is the severity of formation if the pipeline is shut-in to the point of thermal equilibrium with the ocean, and then rapidly restarted?Report Breakdown cont. 8 Section C: Hydrate Risk Management This content must address the following five design questions: 1. Describe the expected plugging mechanism for all pipelines. 2. Is pipeline insulation viable to prevent hydrate formation during cold restart in any line? 3. How much MEG must be injected to prevent hydrate formation during cold restart? 4. Can KHIs or AAs be used as a management strategy in during cold restart in any line? 5. What is your recommended operational method for hydrate management during (i) steady- state, (ii) cold restart operations, and (iii) toward the end of field life? Section D: Wax, Asphaltene, and Corrosion Management This content must address the following four design questions: 1. Do you expect wax dropout during steady-state and/or shut-in operations? 2. Assess the severity of wax formation (if applicable) and prescribe a pigging frequency. 3. Do the oil-phase compositions indicate asphaltenes may precipitate in any line? What is the expected deposition rate of asphaltenes, if applicable? 4. Assess whether internal corrosion may be a risk for any pipeline, and proscribe a corrosion management strategy. Section E: Way Forward This content must address the following two design questions: 1. What are the weakest assumptions you have made throughout this design analysis? 2. In your opinion, what are the five key technical questions that must be addressed through simulation and/or experimental validation in the next development stage of this project?Project Assessment Breakdown 9 Criterion % of total mark No significant contribution or totally ignored 0 Summary fails to capture or describe major design decisions. 30 Adequate description of major design decisions with lack of clarity or inappropriate level of technical detail. 60 Complete description of major design decisions, with appropriate supporting evidence and clear description. 80+ Report Section Maximum Points Executive Summary 10 Section A: Production Network 20 Section B: Gas Hydrate Thermodynamics 15 Section C: Hydrate Risk Management 15 Section D: Wax, Asphaltene, and Corrosion 10 Section E: Way Forward 10 Presentation of Results 20 Distribution of marks for each section of the Term Project Marking criteria for Executive Summary Project Assessment Breakdown cont. 10 Criterion % of total mark No significant contribution or design questions totally ignored. 0 Student conveys limited understanding of design questions, with partial use of heuristics or hand calculations to provide an engineering estimate 30 Design questions are addressed with both hand calculations and OLGA simulations (when applicable), and the results are interpreted to support a design decision. 60 Using both hand calculations and OLGA (where applicable), students can elucidate the advantages and disadvantages ; the design recommendation is 80 accompanied by well-informed discussion of operational strategy. 80 Students demonstrate a superior ability to comprehensively describe steady- state and transient flow (with hand calculations and OLGA, where applicable), to recommend design decisions and operational strategies. Students can identify the assumptions behind critical model and simulation results, to identify which fundamental experiments/analyses could improve their recommendation. 90+ Text Criterion Graphic/Figure Criterion % of total mark Unreadable Illegible 0 Many spelling and sentence structure Low information density, missing errors labels, incorrect significant figures Many spelling and sentence structure Low information density, missing errors labels, incorrect significant figures 20 Moderate (5+) spelling and sentence structure errors Low information density, poorly labelled graphs/charts 50 Minor (< 5) spelling errors Moderate information density 60 Flawless High information density 85+ Marking criteria for Presentation of Results Marking criteria for Section A-E Resources • Textbooks • Lecture Notes • Journals 11Contact Office Hours (2.16 of Mech/Civil Engineering) • Zach: 2-4 PM on Tuesdays • Bruce/Shane: 11 AM to 1 PM on Thursdays Requesting Help • Technical questions should be directed to the LMS discussion board: all students can learn from this feedback • Personal/marking questions can be directed via email to tutors/lecturer 12THANK YOU Questions 13