Table 1

General parameters of production wells with similar geological parameters but different well spacing values in the same block in the Qingcheng oilfield， Ordos Basin"

Fig.1

Relationships between fracturing parameters and cumulative oil production under different well spacing values in the Qingcheng oilfield， Ordos Basin"

Fig.2

Relationships between proppant volume per 100 m stage length and cumulative oil production of fractured horizontal wells under different well spacing values in the Qingcheng oilfield， Ordos Basin"

Table 2

Statistics of fitted compositional parameters of the Qingcheng oilfield， Ordos Basin"

Fig.3

Diagram showing the spatial relationship between cored wells and target wells in the Qingcheng oilfield， Ordos Basin"

Fig.4

Diagram showing the correspondence between fractures in cored wells and target wells in the Qingcheng oilfield， Ordos Basin"

Fig.5

Curves showing the oil-water and oil-gas relative permeability and rock compression coefficient of the Qingcheng oilfield， Ordos Basin"

Fig.6

Time variations of the distributions of pressure field and oil saturation field in well YP3， Qingcheng oilfield， Ordos Basin"

Fig.7

Comparison of oil saturation derived from numerical simulation and PNNPlus logging in the Qingcheng oilfield， Ordos Basin"

Fig.8

Fitted fluid production across different fracturing intervals in well group XP236-44， Qingcheng oilfield， Ordos Basin"

Fig.9

Producing gas/oil ratio， cumulative CO2 production， and cumulative oil production under different numbers of CO2 adsorption intervals in the Qingcheng oilfield， Ordos Basin"

Fig.10

Schematic diagram showing structured energy replenishment"

Fig.11

Single-well staged oil production and average near-wellbore pressure under different CO2 injection volumes in the Qingcheng oilfield， Ordos Basin（MMP.最小混相压力。）"

Fig.12

Variation in single-well staged oil production with injection rate in the Qingcheng oilfield， Ordos Basin"

Fig.13

Variation in single-well staged oil production with single-well CO2 injection volume in the Qingcheng oilfield， Ordos Basin"

Fig.14

Variation in single-well staged oil production with single-well oil-displacing agent injection volume in the Qingcheng oilfield， Ordos Basin"

Fig.15

Variation in the average pressure coefficient of the near-wellbore zone with soaking time in the Qingcheng oilfield， Ordos Basin"

Fig.16

Curves of predicted daily and cumulative oil production for the investigated well group in the Qingcheng oilfield， Ordos Basin"

Table 3

Statistical comparison of horizontal well stimulation and production in the 7th member of the Yanchang Formation， Ordos Basin"

Fig.17

Deployment of the pilot test area for enhanced shale oil recovery in the Qingcheng oilfield， Ordos Basin"

Fig.18

Perforation interval locations before and after refracturing of wells XP231-48 （a） and XP231-45 （b） in the Qingcheng oilfield， Ordos Basin"

Fig.19

Production curves of wells XP230-45 and XP231-48 after refracturing tests in the Qingcheng oilfield， Ordos Basin"