analisis petrografi batuan formasi tondo di daerah

ANALISIS PETROGRAFI BATUAN FORMASI TONDO
DI DAERAH BANAUWE DAN SEKITARNYA
KECAMATAN PASARWAJO, KABUPATEN BUTON
PROVINSI SULAWESI TENGGARA
Oleh:
FENI ALFIANI
(Jurusan Teknik Geologi, Fakultas Ilmu dan Teknologi Kebumian,
Universitas Halu oleo)
[email protected]
ABSTRAK
Daerah penelitian terletak di daerah Banauwe, Kecamatan Pasarwajo,
Kabupaten Buton, Propinsi Sulawesi Tenggara. Secara Geografis terletak pada
5026’00’’ LS dan 122048’00’’- 122051’00’’ BT dengan luas penelitian sebesar 9
km2 (3 km × 3 km ).
Daerah penelitian merupakan bagian dari Formasi Tondo, yang terdir dari
batuan sedimen karbonat dan batuan sedimen klastik. Batuan karbonat
dikelompokan
menjadi
3
jenis
batuan,
yakni
Batugamping
Pacstone,
Batugamping Wackestone, dan Batugamping Crystaline. Jenis batuan sedimen
klastik berupa Batupasir Quartzs Arenit Sandstone. Jenis batupasir dan
batugamping tersebut memiliki porositas yang beragam dan berpotensi sebagai
reservoir hidrokarbon. Porositas Batupasir Quartz Arenit berkisar 10-15%,
batugamping Pacstone berkisar dari 15%-20%, batugamping Wackestone
berkisar 5%-10% dan batugamping Crystaline berkisar 15%-20%. Jenis porositas
yang terdapat dalam pengamatan sampel batugamping tersebut, yaitu jenis
intergranular porosity dan intragranular porosity (tipe porositas primer), dan
Vuggy porosity ( tipe porositas sekunder ).
Kata kunci: Formasi Tondo, Batuan sedimen karbonat, Batuan sedimen klastik,
porositas reservoir, petrografi.
PETROGRAPHY ANALYSIS OF TONDO FORMATION ROCKS AT
BANAUWE AREA ITS SURROUNDING,
PASARWAJO SUBDISTRICT, BUTON DISTRICT OF
SOUTHEAST SULAWESI PROVINCE
By:
FENI ALFIANI
(Geological, Faculty Of Earth Science & Technology, Halu Oleo University)
[email protected]
ABSTRACT
Study area is
located at Banauwe and Pasarwajo Subdistric, Buton
District, Southeast Sulawesi Province. Geographical position of this region lies in
5026’00’’ of south latitude and 122048’00’’– 122051’00’’ of east longitude with a
wide of 9 km2 (3 km× 3 km).
Study area is constituted by Tondo Formation wich consists of Carbonat
and clastic sediment rocks. The carbonat sediment rocks are classified into three
types, namely Packstone, Wackstone and Crystalline Limestone. The clastic
sediment rocks is in the form of Quartsz Arenit Sandstone. The Limestone and
Sandstone have various porosities and have good potential as hydrocarbon
reservoir. The porosity of the Quartsz Arenit Sandstone is about of 10-15%,
Packstone of about is 15%-20%, Wackstone of about is 5%-10% and Crystalline
Limestone of about 15%-20%. The types of porosity in the study area are
intergranular porosity and intragranular porosity ( a types of primer porosity) and
Vuggy porosity ( a types of secunder porosity).
Keywords:
Tondo
Formation,
Carbonate
Sedimentary
Sedimentary Rocks, Reservoir Porosity, Petrography.
Rocks,
Clastic