Interpretation and evaluation method for downhole distributed temperature monitoring production profile of multilayer gas reservoir

• Main Authors: YUE TAO, WEI MINGQIANG, CHEN XU, DUAN YONGGANG, ZHANG RUIDUO, WU MUWANG, SHENG SHUYAO, LIANG HAO, WU ZIJIAN, WEI SHIHAO
• Format: Patent
• Language: Chinese; English
• Published: 11.09.2020
• Subjects: CALCULATING; COMPUTING; COUNTING; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; ELECTRIC DIGITAL DATA PROCESSING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PHYSICS

The invention discloses an interpretation and evaluation method for a downhole distributed temperature monitoring production profile of multilayer gas reservoir. The method comprises the following steps that downhole distributed temperature monitoring data under a target well are obtained; the downhole distributed temperature monitoring data are preprocessed; the temperature data are segmented according to the test curve characteristics and the well logging interpretation result of the target well; a numerical simulation method is adopted to calculate the temperature of each layer of the production profile of a target well rockshaft by using a seepage pressure field-temperature field model of the multi-layer gas reservoir; and the temperature of each layer of the production profile of therockshaft is compared with the segmented temperature data, and the optimal production flow of each layer is obtained through an optimization theory to obtain the production profile of the target well.Based on the gas state eq