Experiments on nitrogen assisted gravity drainage in fractured-vuggy reservoirs

WANG Jing,JI Zemin,LIU Huiqing,HUANG Yitao,WANG Yishuang,PU Yulong

Table 2 Number and contents of experiments.

Serial No. Experiment content Model placement ①-a Different heterogeneity experiments Model I, gas injection at the top and production from the whole-interval Placed vertically as shown in Fig. 5 ①-b Model I, gas injection at the top and production from the bottom Placed vertically as shown in Fig. 5 ①-c Model II, gas injection at the top and production from the whole-interval Placed vertically as shown in Fig. 5 ①-d Model II, gas injection at the top and production from the bottom Placed vertically as shown in Fig. 5 ①-e Model III, gas injection at the top and production from the whole-interval Placed vertically as shown in Fig. 5 ①-f Model III, gas injection at the top and production from the bottom Placed vertically as shown in Fig. 5 ②-a Experiments on different injection rates Model I, Q=3 mL/min Placed vertically as shown in Fig. 5 ②-b Model I, Q=5 mL/min Placed vertically as shown in Fig. 5 ②-c Model III, Q=3 mL/min Placed vertically as shown in Fig. 5 ②-d Model III, Q=5 mL/min Placed vertically as shown in Fig. 5 ③-a Horizontal well injection and production experiments Model I Rotated 90° anticlockwise as shown in Fig. 5 ③-b Model III Rotated 90° anticlockwise as shown in Fig. 5 ④ Plane displacement experiment Placed horizontally as shown in Fig. 5