(1. College of Marine Geosciences，Ocean University of China，Qingdao，Shandong 266003，China；2. School of Geosciences，China University of Petroleum(East China)，Qingdao，Shandong 266580，China；3. China Geological Survey，Qingdao Institute of Marine Geology，Qingdao，Shandong 266071，China；4. Evaluation and Detection Technology Laboratory of Marine Mineral Resources，Qingdao National Laboratory for Maine Science and Technology，Qingdao，Shandong 266071，China)
Abstract：To identify the difference of current geostress distribution and stress accumulation in surface layer and shallow surface layer of Bohai strait and surrounding area，the data of 5 shallow hydraulic fracturing drills along the axis of the channel and the other deep drilling data in surround area were collected. The dispersed point charts of stress varying with depth were established and the regression formulas of each parameter with depth were calculated. The research shows that ， change with depth linearly and ， ， change with depth hyperbolically. ， ， change with depth almost linearly. The comparison of the regression formulae of surface and shallow layer show that the difference of regression formula of horizontal principal stress is significant，the difference of regression formula of lateral pressure coefficient is small and the difference of regression formula of ratio parameters is basically the same. These indicate that the surface stress data can be applied to the analysis of stress accumulation and seismic activity in the brittle crust. The combination of with is necessary to determine the energy accumulation at the points of in stress accumulation analysis. The comprehensive research on and lead to the conclusion that 19 surface points in Bohai strait and 86% shallow points in the surrounding district are in the middle-low level of stress accumulation，and the crustal stability is high. Some points in Beijing，Tianjing and Tangshan are in the state of high stress accumulation，and the crustal stability is low which need more attention. But these have little impact to the cross-sea corridor.
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2017, Vol. 36 
