POLA SEBARAN SEDIMEN MENGANDUNG GAS BERDASARKAN INTERPRETASI SEISMIK PANTUL DANGKAL DI PERAIRAN UJUNG PANGKAH, GRESIK, JAWA TIMUR

Abstract

Dari hasil interpretasi seismik di daerah penelitian dapat dikenali 4 runtunan yaitu runtunan A, B C dan Runtunan D serta sedimen mengandung gas (gas charged sediment) dengan konfigurasi rekaman adalah bebas pantul (free reflection). Pola sebaran sedimen mengandung gas menempati 2 zona yaitu zona I di sebelah selatan Tanjung Wedora dan zona II sebelah utara Tanjung Wedora sampai Ujung Pangkah.
Sebaran sedimen mengandung gas hanya dapat dikenali secara lateral, sedangkan secara vertikal sangat sulit untuk dikenali. Keterdapatan sedimen mengandung gas diperkirakan menempati runtunan C yang tersebar secara merata di daerah telitian.


Shallow seismic interpretation indicate that the stratigraphy of , the study area can be divided into 4 sequences namely sequence A, B, C and D, In the study area, the gas charged sediments also were indicated. The spreading of gas charged sediment occupied at two zones those are zone one in the south off Tanjung Wedora and zone two in the north off Tanjung Wedora extend to Ujung Pangkah.
Spreading trends of the gas charged sediment can be recognized laterally, while vertically is quit dificult. While the existing of gas charged sediment is suggested in sequence C which is spreading on the whole of study area.