フィリピン海洋環境保護区内での試掘井掘削作業の紹介

概要

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In 2004, Japan Petroleum Exploration (JAPEX) entered into a service contract (SC) No.46 with the Department of Energy (DOE) and agreed to drill an exploratory well in a block located in Tanon Strait between Cebu and Negros Islands in Philippines. After seismic data acquisition was completed, it turned out that Tanon strait was designated as a protected seascape by National Integrated Protected Area Act and JAPEX had to go through environmental impact assessment process to obtain Environmental Compliance Certificate (ECC) to drill a well. Environmental study was conducted following EIA guideline and extensive Information, Education and Communication (IEC) campaign was carried out under co-operation with DOE. ECC was issued in March 2007 and the drilling operation was conducted through November 2007 to February 2008.This paper outlines the process to obtain ECC for drilling a well in protected area in Philippines and also introduces severe borehole instability (pack-off) problems encountered during actual operation.
石油技術協会の論文