TWO-FLOW WELL TEST ANALYSIS METHOD AND SYSTEM ON BASIS OF INDICATOR DIAGRAM

摘要

Disclosed are a two-flow well test analysis method and system on the basis of an indicator diagram. The method comprises: measuring a surface casing pressure and load and displacement of a sucker rod of an oil sucking machine, and collecting and acquiring a load and time curve and a displacement and time curve; generating a time-varying polished rod indicator diagram of a load capacity and the displacement of the sucker rod according to the load and time curve and the displacement and time curve; acquiring a pump diagram according to the polished rod indicator diagram; building a working fluid level calculation mathematical model according to the pump diagram, and acquiring working fluid level data of an oil well; acquiring, by means of calculation, flowing bottom hole pressure data according to the working fluid level data of the oil well and the surface casing pressure in a working system; adjusting a parameter of the working system, monitoring variations of the surface casing pressure in real time, acquiring, by means of calculation, variations of the flowing bottom hole pressure data, and generating, by means of fitting, a surface casing pressure variation curve and a flowing bottom hole pressure variation curve; and performing well test analysis according to the surface casing pressure variation curve and the flowing bottom hole pressure variation curve, and acquiring an analysis result.