Publications

Melawi basin is one of the basins in Indonesia that has hydrocarbon potential. This was evidenced by the presence of oil seepages in the outcrops and gas shows in the Kayan-1 and Kedukul-1 wells. However, the Sintang Intrusive is the biggest challenge for hydrocarbon exploration in Melawi basin. In fact, Sintang Intrusive was the cause of drilling failure of Kayan-1 and Kedukul-1 wells. Therefore, the purpose of this paper is to determine the delineation of Sintang Intrusive and provide recommendation focus area for hydrocarbon exploration in Melawi basin. The research method to determine the delineation of Sintang Intrusive are by combining the data of geological map, surface geology mapping in 2017, drilling wells, seismic lines, and gravity. The method to determine the focus area for hydrocarbon exploration utilizes a map of Sintang Intrusive combined with the petroleum system, migration pathways, and traps as a result of the well and seismic interpretation. Result of the study indicates that bouguer anomaly shows Melawi basin divided into two sub-basins, they are eastern and western sub-basins. The gravity value of Sintang Intrusive is 1.05 � 3.97 mgal. The gravity value more than 3.97 mgal with no validation of surface data and seismic lines, can be categorized as part of intrusive. This value is used to make delineation of Sintang Intrusive showing the presence of intrusive which is more dominant in the eastern than western sub-basin. The conclusion of this paper is that the focus area for hydrocarbon exploration in Melawi basin is located in the western sub-basin of Melawi basin and is identified in two locations (A and B) for further hydrocarbon exploration. Further, the focus area is located in the Sanggau and Sekadau districts.