Layer checking and hole filling technical method based on layered productivity evaluation

• Main Authors: LIU DAOTIAN, LAN YIFEI, JIAO TINGKUI, WANG YE, ZHENG XIAOPENG, RU ZHIJUAN, SHI CHANYUAN, WANG SHUJIE, CHEN HONGFEI, FENG YONGJIU, ZHANG HAIBO, HU WEIWEI
• Format: Patent
• Language: Chinese; English
• Published: 26.06.2020
• 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 discloses a layer checking and hole filling technical method based on layered productivity evaluation. The method comprises the following steps of step 1) deriving the lowest single-welldaily gas production amount and the accumulated gas production amount of a layer checking and hole filling horizon under the condition of having economic benefits; step 2) predicting the accumulatedgas production amount of gas wells in different blocks and different horizons, and selecting an initially selected preferred hole filling horizon; step 3) normalizing productivity influence factors, analyzing and calculating the weight coefficient of each productivity influence factor of the initially selected preferred hole filling horizon to obtain a productivity evaluation index of the initially selected preferred hole filling horizon; step 4) determining interlayer interference, namely the influence of the current production horizon on the initially selected preferred hole filling horizon;and step 5) determining wh