Evaluation method and device for oil well production characteristics

• Main Authors: TAO ZHEN, SU LEI, XIONG CHUNMING, MA WENMING, SHI JUNFENG, ZHANG JIANJUN, ZHANG XIN, SUN HUIFENG, ZHAO RUIDONG
• Format: Patent
• Language: Chinese; English
• Published: 26.03.2014
• 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 an evaluation method and device for oil well production characteristics, and is applied to the technical field of oil and gas exploitation. The method includes the first step of determining a yield sequence according to an inflow performance curve of an oil well, and the second step of carrying out the following operations according to each yield in the yield sequence: determining the flowing bottomhole pressure corresponding to the yield, using a multiphase pipe flow formula to compute the corresponding pumping inlet pressure, using the multiphase pipe flow formula to compute the corresponding pumping outlet pressure, computing the difference between the pumping inlet pressure and the pumping outlet pressure to obtain the needed pump pressure difference corresponding to the yield, computing the product between the yield and the needed pump pressure difference to obtain the needed pump power corresponding to the yield, establishing the function relationship between the yield and the nee