Experimental Study of the Main Influencing Factors in Mechanical Properties of Conglomerate

作者：ZHOU Bo,GE Hongkui,ZHOU Wei,WANG Jianbo,HAO Hongyong,WANG Xiaoqiong,LIU Pengyu

摘要：In recent years,with the success of exploration and development of conglomerate reservoirs in Mahu Depression,Junggar Basin,China,it is urgent to study the mechanical properties and its influencing factors of conglomerate which is considered as a new oil and gas reservoir.Based on the investigations of petrologic characteristics,heterogeneity and mechanical properties of conglomerate in Baikouquan formation,the content and geometric characteristics of gravel in conglomerate,the main factors in heterogeneity and the mechanical behavior in the triaxial compression experiment of conglomerate are analyzed in this paper.The results show that the size and content of gravel in conglomerate varies greatly,and conglomerate has strong heterogeneity under the influence of gravel content and size.An analysis of mechanical properties of conglomerate shows that conglomerate is characterized by plasticity.Besides,the sphericity is negatively correlated to the gravel content,while the heterogeneity increases with the increase of conglomerate plasticity.Due to the existence of heterogeneous gravel,local stress may concentrate in conglomerate when the stress is loaded.Consequently,a large number of micro-cracks appear at the edge of gravel,demonstrating the strong plasticity of conglomerate.This paper is of referential significance to the study of rock mechanical properties and the evaluation of engineering properties in conglomerate development.

發文機構：Research Institute of Experiment and Detection of Xinjiang Oilfield Company Xinjiang Laboratory of Petroleum Reserve in Conglomerate Unconventional Oil and Gas Technology Research Institute China University of Petroleum-Beijing At Karamay

關鍵詞：CONGLOMERATEPetrologicalcharacteristicsHETEROGENEITYMechanicalpropertiesPLASTICITY

分類號： TG1[金屬學及工藝—金屬學]