Lithologic Reservoirs ›› 2010, Vol. 22 ›› Issue (2): 107-110.doi: 10.3969/j.issn.1673-8926.2010.02.020

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Fracture prediction of the second member of Xujiahe Formation of Dayi structure

LI Hu，QIN Qirong，WANG Zhiping，XIANG Junming   

  1. School of Resources and Environments， Southwest Petroleum University， Chengdu 610500， China
  • Online:2010-06-15 Published:2010-06-15

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Abstract:

Based on the analysis of the tectonic origins and power resources of Dayi strueture．the model of the structural evolution is summed up．2D numerical simulation of the paleotectonic stress field is applied to predict the cracking degree of the rock mass in the study area, to determ ine the relationship between the cracking degree 0f the rock mass and fracture development and to classify the level of fracture development， and then ealTy out the predicti0n of the degree of fracture development，types and occurrences of fracture． The result shows that the fractures in the second member of Xujiahe Formation are well developed in the structural high and nearby as we11 as the fault and nearby．Five groups 0f fractures are formed by the two periods of tectonic stress field， and the main extensional directions 0f these
fractures are NW，NE，EW and NS．

Key words: diagenesis, pore types an d evolution, diagenetic sequence, Callovian-Oxfordian Formation, Saman depe Gas Field, Turkmenistan

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