GEOMECHANICAL STRESS PROFILE AT GUNDIH FIELD: STRESS QUANTIFICATION AND ANALYSIS IN RESERVOIR FOR CO2 INJECTION

Harya Danio (Geological Engineering Study Program, Universitas Pertamina Jakarta Indonesia)
Benyamin Sapiie (Geological Engineering Study Program, Institut Teknologi Bandung, Bandung , Indonesia)
Oddy Adnan (Geological Engineering Study Program, Institut Teknologi Bandung, Bandung , Indonesia)
Takeshi Tsuji (International Institute for Carbon-Neutral Energy Research (I2CNER), 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan)
Mohammad Rachmat Sule (Geophysical Engineering Study Program, Institut Teknologi Bandung, Bandung 40132,)

Petro : Jurnal Ilmiah Teknik Perminyakan
Vol. 8 No. 4 (2019): DESEMBER

Geomechanical analysis is performed at Gundih Field to obtain detail stress condition and mechanical properties from interval of interest. Ngrayong Formation is targeted as CO2 injection interval of Gundih Field. The detail interval 8 is determined using multi-mineral modelling and calibrated using XRD and petrographic data. Overpressure is detected from this well at Ngrayong Formation. Stress direction from adjacent well showed NE – SW direction of maximum horizontal stress. Stress magnitudes and mechanical properties are calculated using available log data through well-established empirical equation resulted thrust faulting regime acting on this area. Injection capability of formation is examined from Mohr – Coulomb diagram with input from calculated stress.Keywords: Geomechanics; Gundih Field; Ngrayong Formation; Reservoir; overpressure.