Land Subsidence Analysis Using PS-InSAR Method in Duri Hoou Oil Exploration Area, Mandau District, Riau Province

Land Subsidence Analysis Using PS-InSAR

Abstract

Duri City is the largest national petroleum producing area located in Mandau District and part of Bengkalis Regency in Riau Province. Land subsidence occurs due to continuous groundwater extraction, this has the potential to cause land subsidence and can trigger other problems such as damage to infrastructure, oil and gas production facilities. This will disrupt operations and require large repair costs. The method used is PS- InSAR, this method can calculate the value of land movement using scin 23 imagery so that movement can be obtained in a time series. The accuracy of the land movement value was tested by conducting geodetic GPS observations so that values were obtained at several points in the study area. To determine whether there was an influence on the value of PS-InSAR processing and geodetic GPS observations, a parametric t-test was conducted. The range of movement values obtained after the results of PS-InSAR processing was a range of 17.5 mm to -27.5 mm per year, with the distribution of land movement in the northern and southern parts of the Duri HO area. The results of the paired sample T-Test calculation with 25 samples produced a test value of 0.754, so the initial hypothesis was accepted (H0) with the conclusion that there was no significant difference between the data from the sarproz processing results and the GPS coordinate value data in the HO Duri area.