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Unconventional resources in Algeria: appraisal result from the Hamra Quartzite reservoir
Soumya Benayad,박영수,Rabah Chaouchi,Naima Kherfi 한국지질과학협의회 2013 Geosciences Journal Vol.17 No.3
Unconventional resources have been widely discovered within the Ordovician rocks (Hamra Quartzite reservoir) of a number of basins in Algeria, including the giant Hassi Messaoud oil-field. This study aims to provide an appraisal of the major characteristics of the Hamra Quartzite reservoir within the southern peripheral area of the Hassi Messaoud field. Petrographically, quartz grains in this reservoir are considered to be mature quartz arenites characterized by pervasive quartz overgrowth. Reservoir porosity is dominated by secondary intergranular dissolution porosity. The diagenetic sequence of the Hamra Quartzite reservoir occurred in three phases: eodiagenesis (early), mesodiagenesis (mid), and telodiagenesis (late) phases. These phases are directly related to tectonic events that affected the study area, and are controlled mainly by the Hercynian unconformity. The Hamra Quartzite reservoir was highly silicified during the pre-Hercynian phase. Compaction and cementation are the principal factors controlling reservoir degradation. The reservoir is faulted and fractured, and fractures ranging from partially open to closed are observed in cores. Petrophysically, the reservoir displays low porosity and permeability values. However, moderately porous and permeable sandstone is present toward the southeastern part of the studied reservoir.
Hydrocarbons Law and Bidding Opportunities in Algeria
박영수,Soumya Benayad 한국자원공학회 2013 한국자원공학회지 Vol.50 No.5
Algeria is heavily reliant on its hydrocarbon sector, which accounts for 70% of its government budget revenues. However, in recent years, crude oil production has been stagnant and natural gas production has gradually declined on account of consistent delays in new production and infrastructure projects. In addition, in the last licensing rounds, there has been limited interest from foreign investors to undertake new oil and gas projects under the government’s current terms such as stringent financial terms and windfall taxes. On the other hand, petroleum experts have related this limited interest to the lack of hydrocarbon potential of the blocks offered, rather than unattractive fiscal terms. In February 2013, the Algerian parliament amended the country’s hydrocarbon law and introduced fiscal incentives to entice foreign companies to undertake new ventures, particularly in the exploration of unconventional resources, both onshore and offshore.