Induced fracture from strike-slip faulting is an important type of reservoir space of carbonates

thus has been drawing more and more attention.However

its mechanism and scale are not clear now.In order to delineate fracture system controlled by strike-slip faults

we carried out quantitative evaluation by means of comprehensive application of core

image logging data and numerical simulation.After the identification and description of structural fractures in Shunnan area

the characters of fracture development controlled by strike-slip faults were summarized

and their main controlling factors were analyzed.Then through the construction of geological model

the induced local stress field and the deformation process of the strike-slip fault were simulated by using the finite element method.What's more

the influential factors and distribution of the induced fractures from strike-slip faults were discussed through analysis of stress-strain

and the pattern of fracture development in the 3D seismic acreage of Shunnan area was predicted further.The results show that(1) the structural fracture controlled by major strike-slip faults is the main type of fractures in Shunnan area

its strike is basically consistent with that of the faults

and it is dominated by high angle-nearly vertical shear fractures.Besides

fracture development is closely related to the segmentation and lithology of faults.(2) The extent of induced fractures from strike-slip faults is 1.25-6.5 times as many as the width of the core of fault zone

and the intensity and extent of fracturing in the pull-apart segments of faults are significantly larger than those in the strike-slip segments.(3) Along the lithologic interface

the scope of fracture development controlled by strike-slip faults expands obviously.The higher the competency of rocks is

the easier it is for the development of induced fractures

and the larger the extent of induced fractures becomes.(3) The Late Caledonian-Early Hercynian fractures are mainly distributed along the NE-trending strike-slip faults as a whole in the 3D seismic acreage in Shunnan area

and the fractures in the Yingshan Formation are better developed those that in the Yijiangfang Formation.