Fig. 1

Workflow for numerical simulation of high-precision tectonic stress fields， multi-parameter prediction of fracture distribution， and the construction and verification of the development index for fractured carbonate reservoirs of the Ordovician"

Fig. 2

Structural units and stratigraphic framework of the Tarim Basin"

Fig. 3

Structural geometry of the No.18 fault zone in Shunbei area"

Fig. 4

Core photos showing the characteristics of fracture development in the Ordovician carbonate rocks in Shunbei area"

Fig. 5

Calculation results of dynamic rock mechanical parameters and statistical results of parameters denoting fracture intervals for the Ordovician carbonate reservoirs in wells X8 and X9 in Shunbei area"

Table 1

Rock mechanical parameters of the Ordovician strata in Shunbei area"

Fig. 6

Planar distributions of the dynamic and static rock mechanical parameters of the Ordovician carbonate rocks in the No.18 fault zone and adjacent regions in Shunbei area （see Fig. 2b for the fault location）"

Fig. 7

Analysis of the present-day horizontal principal stress orientation of the Ordovician carbonate reservoirs in Shunbei area"

Table 2

Measured paleomagnetism and acoustic anisotropy of the Ordovician carbonate rock cores from well X4 in Shunbei area"

Fig. 8

Mathematical model for present-day stress field simulation of the Middle Ordovician Yijianfang Formation in the No. 18 fault zone and adjacent regions in Shunbei area"

Fig. 9

Sampling and results of acoustic emission tests on the Ordovician carbonate rocks in Shunbei area"

Fig. 10

Boundary condition optimization for present-day stress field simulation using a self-adaptive boundary constraint algorithm"

Fig. 11

Simulation results of the present-day stress field in the Middle Ordovician Yijianfang Formation in the No. 18 fault zone and adjacent regions in Shunbei area （see Fig. 2b for the fault location）"

Fig. 12

Predicted rupture rates of the Middle Ordovician Yijianfang Formation in the No. 18 fault zone and adjacent regions in Shunbei area （see Fig. 2b for the fault location）Iz=aIt+bIn/2 （10）"

Fig. 13

Assessment of the sliding trend coefficients， expansion coefficients， and fracture opening pressures of the major faults in in the No. 18 fault zone in Shunbei area"

Fig. 14

Comprehensive rupture rates of the Ordovician carbonate reservoirs in different segments along the strike of the No. 18 fault zone in Shunbei area"

Fig. 15

Correlations between the rupture rates of the Ordovician carbonate reservoirs and vertical deformation intensities of the major faults in the No. 18 fault zone and adjacent regions in Shunbei area （see Fig. 2b for the fault location）"

Fig. 16

Correlations of the present-day normalized comprehensive rupture rate with the distances from major faults， sliding trend coefficients， expansion coefficients， and fracture opening pressures on fault planes in the Middle Ordovician Yijianfang Formation in the No. 18 fault zone and adjacent regions in Shunbei area"

Fig. 17

Correlations between normalized comprehensive rupture rate and stress perturbation in the Middle Ordovician Yijianfang Formation in the No. 18 fault zone and adjacent regions in Shunbei area"

Fig. 18

Development index of large-scale reservoirs and the geological models of reservoir development in single wells for the Middle Ordovician Yijianfang Formation in the No. 18 fault zone and adjacent regions in Shunbei area"

Table 3

Criteria for ranking large-scale reservoirs in the Ordovician carbonate rocks，Shunbei area"

Table 4

Comprehensive assessment of reservoir levels for different segments of the No. 18 fault zone in Shunbei area"