Method for determining production state of self-spraying production oil well

• Main Authors: LI LONGLONG, CHEN SHUYANG, LI MINQI, ZHOU QIAO, HAN TINGTING, PAN LIN
• Format: Patent
• Language: Chinese; English
• Published: 08.06.2018
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention provides a method for determining the production state of a self-spraying production oil well. The method comprises the following steps that 1, production data of three stages in the oilwell development process is collected, a basic relationship is constructed based on the production data, and the basic relationship is used as a fitting target to obtaina single well sample equation;2, the production data is used as a fitting sample, a mathematical statistics analysis method is used for conducting multivariate nonlinear regression analysison the production data of the three stages to obtain a to-be-fitted parameter value of a single wellat each stage, and production stateequations of an elastic energy release phase, a rigid water flooding phase and an oil-water two-phase flow phase are further obtained; 3, fitting degree RNew computation is conducted on well oil production Qo and actual oil productionqO calculated by the production stateequations, and the value of fitting degree RNew is infinitel