New Method to Quantitatively Describe Remaining Oil by Dynamic Data

Abstract

Remaining oil description is the core of its research. Although many description methods are available, most of them are qualitative ones. So, this paper introduces a concise quantitative method – “remaining oil dynamic data analysisâ€, which uses the production performance data to study remaining oil. This method includes five procedures: (1) establish an optimal fitting relationship between cumulative oil production and water cut; (2) determine recoverable reserves through the relationship; (3) determine cumulative oil production by production data; (4) determine remaining recoverable reserves of single wells; (5) draw remaining oil distribution graphs. This method is applied to Hua 201 oilfield remaining oil research, and the result shows good adaptability to high water cut oilfield in late development stage. This method has simple and convenient calculation process and results that are close to field practice, therefore having important application value.