Semburan gas bercampur air dan lumpur di Desa Metatu, Kecamatan Benjeng, Kabupaten Gresik, Jawa Timur

Akhmad Zaennudin, Hanik Humaida, Ugan B. Saing, Rachmad W. Laksono

Abstract


Abstrak
Semburan gas bercampur air dan lumpur di Desa Metatu, Kecamatan Benjeng, Kabupaten Gresik, JawaTimur terjadi pada bulan November 2012. Semburan tersebut dipicu oleh akumulasi gas hidrokarbon yang terperangkap
di bawah permukaan. Desa Metatu dan sekitarnya merupakan wilayah minyak dan gas bumi yang telah diusahakan sejak zaman Belanda, sehingga banyak dijumpai sumur minyak peninggalan Belanda. Gas hidrokarbon yang memicu semburan Metatu tersebut didominasi oleh gas metana berasal dari oil window
seperti yang terdapat di gunung lumpur LUSI, Sidoarjo, tetapi kedua mempunyai perbedaan dalam tingkat kematangannya. Kematangan gas metana dari semburan gas Metatu mempunyai tingkat kematangan yang
lebih rendah dari tingkat kematangan LUSI.
Kata kunci: Metatu, semburan gas, lumpur

Abstract
Gases outburst mixed of water and mud in Metatu village, Benjeng subdistrict, Gresik regency, East Java occurred in November 2012. This outburst was trigerred by high pressure of hydrocarbon gases that were accumalted beneath the surface. Metatu and its surrounding is potensially petroleum and natural gases which was developed since Ducth era, so this area plenty of oil wells that were construted by Ducth. Hydrocarbon gases that trigger a gas outburst at Metatu is dominated by methane gas of oil window origin like as in LUSI mud volcano, Sidoarjo, but among them different in maturity degree. Hydrocarbon gas maturity of Metatu gas outburst is lower than LUSI.
keywords: Metatu, gases outburst, mud


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DOI: http://dx.doi.org/10.34126/jlbg.v4i3.57

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