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Capacity Allocation for New Firm Transportation Request in Gas Shipper Network

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palmer-luna
2 diapositives · 162 Views · Nov 17, 2014

This document outlines the methodology for reallocating capacity among existing shippers to accommodate a new firm transportation request by Shipper C for 50 MDth/d. The analysis focuses on existing Maximum Delivery Obligations (MDO) and Contractual Minimum Quantities (CMQ) of Shipper A and Shipper B. It calculates excess MDO, determines available capacity after the new request, and allocates the remaining MDO based on pro-rata CMQ to ensure compliance with the overall lateral capacity constraints.

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  1. Shipper C New 50 MDth/d Firm Load Shipper A Shipper B MDO = 100 MDth/d CMQ = 80 MDth/d MDO = 200 MDth/d CMQ = 50 MDth/d Lateral capacity = 300 MDth/d • Given: • Shipper A and Shipper B CMQ and MDO’s as stated above (no other shippers on lateral) • New Shipper C requesting firm 50 MDth/d load at a new delivery adjacent to Shipper A and Shipper B delivery points • Total of Shipper A and Shipper B MDO’s equal to lateral capacity • Determine: • Shipper A and Shipper B MDO reductions to accommodate new Shipper C firm transportation request of 50 MDth/d • Methodology: • Determine total MDO in excess of total CMQ. • Excess MDO Shipper A = (100-80) MDth/d = 20 MDth/d; Excess MDO Shipper B = (200-50) MDth/d = 150 MDth/d • Total Excess MDO Shipper A + Shipper B = (20+150) = 170 MDth/d • Determine total MDO available after 50 MDth/d firm transportation request. • MDO Available after request = Total Excess MDO – Firm Transportation Request = (170-50) MDth/d = 120 MDth/d • Determine allocation of remaining MDO to Shipper A and Shipper B based on pro-rata CMQ • Shipper A allocation of MDO in excess of CMQ = (CMQ Shipper A/Total CMQ)*Available MDO = (80/(80+50))*120 = 74 MDth/d • Shipper B allocation of MDO in excess of CMQ = (CMQ Shipper B/Total CMQ)*Available MDO = (50/(80+50))*120 = 46 MDth/d • Determine new MDO’s for Shipper A and Shipper B (subject to the limitation that new MDO cannot exceed original MDO) • New Shipper A MDO = CMQ+Shipper A allocation of MDO = (80+74) MDth/d = 154 MDth/d. New MDO cannot be greater than existing MDO, implying new MDO Shipper A = 100 MDth/d (unchanged). • Therefore all MDO reductions will come from Shipper B. NewShipper B MDO = (200-50) MDth/d = 150 MDth/d

  2. Shipper C New 50 MDth/d Firm Load Shipper A Shipper B MDO = 100 MDth/d CMQ = 80 MDth/d MDO = 200 MDth/d CMQ = 150 MDth/d Lateral capacity = 300 MDth/d • Given: • Shipper A and Shipper B CMQ and MDO’s as stated above (no other shippers on lateral) • New Shipper C requesting firm 50 MDth/d load at a new delivery adjacent to Shipper A and Shipper B delivery points • Total of Shipper A and Shipper B MDO’s equal to lateral capacity • Determine: • Shipper A and Shipper B MDO reductions to accommodate new Shipper C firm transportation request of 50 MDth/d • Methodology: • Determine total MDO in excess of total CMQ. • Excess MDO Shipper A = (100-80) MDth/d = 20 MDth/d; Excess MDO Shipper B = (200-150) MDth/d = 50 MDth/d • Total Excess MDO Shipper A + Shipper B = (20+50) = 70 MDth/d • Determine total MDO available after 50 MDth/d firm transportation request. • MDO Available after request = Total Excess MDO – Firm Transportation Request = (70-50) MDth/d = 20 MDth/d • Determine allocation of remaining MDO to Shipper A and Shipper B based on pro-rata CMQ • Shipper A allocation of MDO in excess of CMQ = (CMQ Shipper A/Total CMQ)*Available MDO = (80/(80+150))*20 = 7 MDth/d • Shipper B allocation of MDO in excess of CMQ = (CMQ Shipper B/Total CMQ)*Available MDO = (150/(80+150))*20 = 13 MDth/d • Determine new MDO’s for Shipper A and Shipper B • New Shipper A MDO = CMQ+Shipper A allocation of MDO = (80+7) MDth/d = 87 MDth/d. • NewShipper B MDO = CMQ+Shipper B allocation of MDO = (150+13) MDth/d = 163 MDth/d