INITIAL KILLING PROCESS IMPROVEMENT FOR PLUG AND ABANDONMENT JOB AT DURI STEAM FLOOD ENVIRONMENT

• Main Author: Putra, Arsallah
• Format: Theses
• Language: Indonesia
• Subjects: Manajemen umum
• Online Access: https://digilib.itb.ac.id/gdl/view/54667
• Institution: Institut Teknologi Bandung

Beside to produce oil or gas, each production sharing contractor (PSC) including the Maliha Minyak Indonesia (MMI) has obligation to restore ex-location of oil and gas wells and eliminate the environmental impact by performing Plug and Abandonment (P&A).The total P&A Wells executed by MMI are 164 wells in 2020. This number is lagging 5 wells from the total 169 wells that shall be executed in 2020. One of the procedures that very unpredictable, takes a longer duration, and budget from the target is Initial Killing Job. Based on 159 well executions from 2016 to 2020, initial killing takes in an average of 15 hours with a deviation of 30 hrs. While the target stated in P&A programs is only 4 hours. Most of the deviation occurs in the P&A execution on steam injector wells Using the conceptual framework, there are at least 6 contributing factors to the initial killing process in steam injector such as well control risks, barriers, kill fluid materials, operation rigors, well formation characters, and human capability. From the swim lane diagram, initial killing process contributes to about 90% of potential delay hours in overall P&A job execution. The root cause analysis is evaluated using the Current Reality Tree based on interview and observation. There are 6 root causes that contributes to the prolonged initial killing process. 2 of 6 root causes (i.e incompatibility fluids and generalized SOP) are the major contributors of the initial killing delays which will be evaluated later. The wells in Duri Steam Flood (DSF) have characteristics of loss formation. Through a Focus Group Discussion, the team identified 7 potential alternatives to resolve the incompatibility fluids during the initial killing process. The evaluation of the best alternatives is identified using Kepner-Tregoe scoring matrix. The offline cementing job for initial killing is evident as the best alternatives which fulfil all the must attributes and have the highest score of want attributes. Beside a cheaper cost, this alternative has a high success ratio to plug the formation and contributes to the main cementing job. In order to have an alignment with the proposed alternative, the current SOP for initial killing shall be revised. This initiative is already implemented in 3 P&A injector wells execution with total benefit USD48,031 from the reduction of rig operation rate and elimination of kill fluid materials.