A Surfactant System for the Oil-Wet Sandstone Of the North Burbank Unit

作者：David F. Boneau, R.L. Clampitt · 发表于：Journal of Petroleum Technology · 年份：1977 · DOI：10.2118/5820-pa · 被引用次数：98 · 研究领域：Enhanced Oil Recovery Techniques、Reservoir Engineering and Simulation Methods、Hydraulic Fracturing and Reservoir Analysis

Oil-displacement tests in water- and oil-wet sandstone cores with similar permeability, porosity, and pore structure showed that oil recovery was reduced and sulfonate retention was increased for the oil-wet case. A promising aqueous surfactant system was selected for a pilot test in the North Burbank Unit. Introduction A study of the feasibility of surfactant flooding in the North Burbank Unit reservoir in Osage County, Okla., required a knowledge of the effects of wettability on recovery since the North Burbank reservoir is strongly oil-wet. Previous laboratory studies, of surfactant systems containing petroleum sulfonates have been restricted to tests in water-wet rock. A pilot test of one process has been carried out in the oil-wet Bradford process has been carried out in the oil-wet Bradford sandstone, but no supporting laboratory work has been published. This study compares the performance in both published. This study compares the performance in both water- and oil-wet sandstone of a surfactant system recommended for a field trial in the North Burbank Unit. Surfactant systems have been investigated for recovering the crude oil that remains after waterflooding. The usual procedure in a surfactant flood is sequential injection of a brine preflush to condition the reservoir, a slug of the surfactant system to displace residual oil, and a graded mobility buffer to drive the surfactant slug. Surfactant-Polymer System The surfactant system recommended for the North Burbank U...