DECISION ANALYSIS FOR RESERVOIR PRESSURE DEPLETION IN LOW QUALITY SAND RESERVOIR OF HEAVY OIL WELL AT PT. CENTRAL DINAMIKA ENERGI (CDE)*

• Main Author: Saleh, Rahmat
• Format: Theses
• Language: Indonesia
• Subjects: Manajemen umum
• Online Access: https://digilib.itb.ac.id/gdl/view/51134
• Institution: Institut Teknologi Bandung

Central Dinamika Energi (CDE)* is multinational oil and gas company which has been operating in Indonesia for more than 90 years. The company has been giving the significant contribution to the economic growth by creating lots of job opportunity as well as delivering nearly 30% of total country’s daily oil production. CDE will hand over its Production Sharing Contract (PSC) concession area to the Government of Indonesia (GOI) in August 2021. Despite that, CDE is expected to start drilling program to maintain the oil production and flatten the oil production declining curve. CDE develop task force team called Drilling optionality team. The team is assigned to identify drilling opportunity in heavy and light oil field. The team consists of member from Drilling and Completions team and Asset Development team to design field development and plan the drilling execution. One of the candidates for field development in heavy oil area is Area J South West. At Area J South West, there was opportunity to develop reservoir sand S2 and S3. This area is selected due to potential of oil reserve that has not fully developed although currently it has become second highest contributor for heavy oil production. On the other hand, there was an issue of potential overpressure when drilling reach the reservoir sand S1 based on the previous drilling campaign in 2015. Heavy oil production will decline if Area J SW is not drilled in the near time with estimation of 30% reduction from current heavy oil production. Why tree analysis is used to identify all potential root causes to the overpressure problem. Based on the root causes identified, the alternatives were developed as the possible solution to the problem. AHP methodology was used to select the best alternatives based on the specific criteria. The respondents were engaged and briefed about the methodology and how to perform pairwise comparison prior to fill out the questionnaire form for criteria and alternative. The result of questionnaire then reviewed by the author to check for its consistency using the free software AHPCalc developed by Business Performance Management Singapore (BPMSG). There were four criteria and three alternatives to be selected by each respondent. Drilling optionality team is preparing project document package to be submitted to SKK MIGAS to get drilling campaign agreement. Once the agreement obtained, the next activities will be performed which are meeting of work plan and budget, contracting and procurement for material, rig and services, delivery of material and finally project execution.