ENHANCED OIL RECOVERY (EOR) BY UTILIZING FLUE GAS OF MUNICIPAL SOLID WASTE POWER PLANT FOR SANDSTONE RESERVOIR OF PDT FIELD

• Main Author: Riyono, Sugeng
• Format: Dissertations
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/37256
• Institution: Institut Teknologi Bandung

Enhanced Oil Recovery (EOR) has been pronounced to enforcement of it’s implementation by Indonesia Government, because of the fact that oil production is declining to reach below 800 thousands barrels per day and most of the oil fields are in their mature conditions. It seems that exploration activity is still not showing a good result of new additional reserves remarkably to be productive fields. To day, CO2 injection method have been known as one of the effective EOR methode to be selected for the implementation after a series of screening techniques. This positive recovery also works for flue gas (CO2+N2) injection methods. Flue gas sources are identified at surrounding candidate fields, such as natural gas plants, fossil fueled power plants and downstream unit plants emitting CO2 as flue gas as well as Municipal Wastes power plant unit. This EOR method will help to reducing Green House Gas (GHG) emission significantly. USA government has implemented CO2 EOR intensively in more than 100 fields. This study will focus on “Municipal Solid Wastes (MSW) Combustion Flue Gas Utilization for EOR of Pondok Tengah Oil field on Sandstone Reservoar”. The renewable flue gas is collected from Bantar Gebang MWS Power plant (Land fill) should be accounted cheaper price than that of pure CO2.The API gravity of oil and reservoar pressure to be very important parameters to be characterised in flue gas injection activity, while measurement of oil density and PVT parameters are fundamentals in reservoar fluids displacement mechanism especially for determining the Minimum Miscible Pressure (MMP). This study also specifies flue gas solubility effects toward oil viscosity and mobility as identified by changes in pH to be 4.7 causing contact angle value tends to behave water wet. As it is known that MMP is to high to be reached by flue gas flooding at current reservoar pressure (2500 psi), so immiscible or near miscible flooding will be accounted in this study. Flue gas captured from MSW Power plant out let is not processed for purification and the specific composition of CO2 and N2 (21% by 79%) is treaded for this study both in laboratory core flooding experiment as well as simulation of core model and pattern model. The main objective of this study is to understand the internal pore rock-fluids interactions with flue gas injection process and the additional recovery that can be obtained, it is understood that the positive interactions have been showing very good result of additional recovery of 43% (water flood), 38% (flue gas injection), and additional 8% (post flush). A well basis pilot to be conducted at a 2.5 meter interval of TAF productive zone of PDT-15 well having 0.02 MMSTB OOIP which covers 0.05 pore volume lead to a succeed simulation study to fit the coreflooding results. Injection rates were set at range of 0.1-1 MMScfd as limitation of maximum rate at 1.1 MMScfd of typical Bantar Gebang MSW. The result has 97% recovery, a significant value suggested as stripping effect of light composition to middle of reservoir fluid. It is also studied in brief that utilization of flue gas for EOR gives less budgets of expenditures than using pure CO2. Engineering estimate of the flue gas injection pilot of PDT-15 well has total budget of about 13,266,000 US$ with piping transportation mode, while it is less cost if implementing trucks transportation mode at cost 820,000 US$, to be 8,003,000 US$.