Controls of Fractures and In-Situ Stress on Productivity in Strike-Slip Fault Zones in Shunbei Area, Tarim Basin

doi:10.7657/XJPG20250403

Abstract

Abstract:

According to development background of the strike-slip fault zones in the Shunbei area of Tarim Basin, combined with the Riedel shear model, the development characteristics of dominant fractures of different strike-slip structural styles and the reworking of the effectiveness of fracture systems in different structural segments are analyzed by using the theory of geomechanics, and the controls of fracture and in-situ stress on productivity are clarified. The research shows that the combination of strike-slip faults controls the local stress state and fracture development pattern. The oil and gas productivity of the strike-slip fault-controlled reservoirs is controlled by the characteristics of stress field, and the occurrences of new fractures and pre-existing dominant fractures. The combination of small-scale faults and fractures derived from the strike-slip structural segments increases the effectiveness of the fault zones, and the well productivity in this area is generally high.

Key words: Tarim Basin, Shunbei area, strike-slip fault, fracture characteristic, stress distribution, productivity

CLC Number:

TE122

HE Xinming, ZHANG Huitao, GUO Honghui. Controls of Fractures and In-Situ Stress on Productivity in Strike-Slip Fault Zones in Shunbei Area, Tarim Basin[J]. Xinjiang Petroleum Geology, 2025, 46(4): 410-418.

Figures/Tables 8

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Table 1.

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井名	深度/m	最大水平主应力/MPa	最小水平主应力/MPa	最大水平主应力方向/（°）	孔隙压力梯度/ （MPa·hm^-1）
顺北43X井	7 543.00—7 543.18	194	168	349.8	1.20
顺北44X井	7 416.60—7 411.90	192	164	2.2	1.19
顺北46X井	7 417.63—7 417.80	180	167	278.7	1.14