UNLOCKING THE HIDDEN POTENTIAL OF LOW RESISTIVITY AND LOW CONTRAST RESERVOIR

• Main Author: Baskoro, Luke
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/48101
• Institution: Institut Teknologi Bandung

Interest in Low Resistivity and Low Contrast (LRLC) reservoir has been rising as marginal field development requires notable effort to maintain its declining production. LRLC, defined as productive zones without standout petrophysical and fluid properties compared to conventional productive zones, is possible to increase production with minimum effort compared to lengthy steps of new reserve exploration. A new approach is needed to economically produce these low quality zones. At the early stage, we reassessed existed data to ensure the feasibility of a formation for producing hydrocarbon. Some logging data, mud log and open hole log, augmented with core data are evaluated through rock typing for identification of potential formation. A development plan is designed based on the wells and reservoir condition as well as the availability of the production and completion methods. The study is will be applied to well Y on XX shaly sand reservoir whose resistivity around 1-1.6 ohm.m and identified as a bypassed zone from a commingled production. A new integrated evaluation and logging analysis confirms that the reservoir is not in optimum production and leaves significant hydrocarbon reserves. Hydraulic fracturing stimulation is proposed to enhance the productivity index and improve the recoverable reserves. It is also worth noting that this fracture design has to be designed properly in order to reduce the possibility of overly producing the LRLC zones or creating unnecessary crossflow inside the production tubing. Then to validate this reservoir potential using synthetic model referring to the previous condition of the well, optimum result of these bypassed formation can be determined. Result gives total production 93.759 MBBL from the original oil in place (recovery factor of 14.5%) and using hydraulic fracturing will give higher PIR, shorter payout time, and higher NPV. Therefore, this study leads to a new approach in LRLC development. Referring to this study, several zones prospect might be re-evaluated, which can massively improve efficiency opportunities in conventional hydrocarbon production. This study presents a new insight on how to develop LRLC reservoir based on best practices from around the world as well as experiences in the particular marginal field.