STUDI INTERKONEKSI SUMUR INJEKSI TERHADAP SUMUR PRODUKSI DENGAN METODE ISOTOP ALAM (2 H DAN 18 O) DI LAPANGAN MINYAK TALANG JIMAR, PT. PERTAMINA EPREGION SUMATERA, FIELD PRABUMULIH

• Main Authors: , RIZKY PADUTAMA, , Ir. Agus Budhie Wijatna, M.Si.
• Format: Theses and Dissertations NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2013
• Subjects: ETD
• Online Access: https://repository.ugm.ac.id/121330/; http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=61413
• Institution: Universitas Gadjah Mada

The research to study the interconnection of injection wells toward production wells has been conducted in Talang Jimar Oil Field, PT. Pertamina Sumatera Region, Prabumulih Field with natural isotopes (2H and 18O) method. The first purpose of this research is to know the interconnection of injection wells and production wells around it. The second, whether the groundwater wells mixed with injection water. Third, how far the influence of isotope fraction of water injection wells toward production wells. In this research, watercut of water samples have been taken from the injection wells, production wells and groundwater to analyze of the content of the isotope deuterium (�2H) and oxygen-18 (�18O) by using liquid water stable isotope analyzer LGR. If the results of the content of �2H dan �18O from production wells are almost equal to the water isotope injection and the value is different enough from groundwater isotope, it can be concluded that the water production wells only come from water injection. Analysis result of �2H and �18O shows the interconnection realationship betwen the samples of production wells and the injection well around it. Then the anomaly occurs in SP TLJ-127 production well and SP TLJ-118 production well which both of the wells relatively have the same isotopes ratio composition. The last, the analysis result of the isotope fraction of water injection that exist is from 79.81% % to 99.95%. This condition shows that maybe, water intrusion that occurres in production well is from 0.05% to 20.19%. Keywords: content of the isotope deuterium and oxygen-18, Interconnection, isotope fraction, intrusion.