Determining oil column height by excess pressure interpretation for Te Giac Trang field: A case study for developing oil fields of stacked and thinly laminated hydrocarbon bearing reservoirs
Abstract
The Te Giac Trang field located offshore Vietnam's continental shelf in Block 16-1, Cuu Long basin, is a special hydrocarbon accumulation of thinly stacked oil layers with complex geological features, discontinuous hydrocarbon bearing reservoirs separated into different oil pools by tectonic faults, etc., which caused significant challenges toward the estimation of initial oil reserve in-place, production wells design, and perforation strategy.
This paper introduces a method to accurately determine the height of the oil column, the free water level of each reservoir at Te Giac Trang field, which are important parameters in well design, reserve estimation of oil and gas in-place and for field development plan. Accumulated production shows that the current oil recovery rate of Te Giac Trang field is 32% and expected to reach 40 - 50% by the end of the field life by natural and gas-lift production. This is a new direction to develop fields featuring similar geological characteristics as Te Giac Trang: hydrocarbon bearing reservoir consisting of thinly laminated, alternating clay and sand layers with low resistivity.
References
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