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Research and Application on Rock Mechanical Characteristics of Chang6Reservoir in Jiyuan Oilfield

Author: LiZiJian
Tutor: LiTianTai
School: Xi'an University of Petroleum
Course: Oil and Gas Well Engineering
Keywords: Jiyuan Oilfield Chang6reservoir Rock Mechanics Ground Stress Borehole Wall Stability
CLC: P618.13
Type: Master's thesis
Year: 2013
Downloads: 2
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Abstract


The Chang6reservoir has several favorable areas in Jiyuan Oilifeld, which have the goodprospect for exploring and exploiting.However,Chang6reservoir has characteristics of tightreservoirsw, complicated oil-water erlationship and poor reservoir property,hich are notconductive to improving the production of single well.This paper has taken the Chang6reservoir of Jiyuan Oilifeld as research object, on the basis of laboratory rock mechanicsexperiments, thoroughly analyzed and studied the characteristics of Chang6reservoir ofJiyuan Oilfield rock petrophysical properties and its application.The petrophysical properties of Chang6have been analyzed on the basis of basicphysical parameters and laboratory rock mechanical parameters tests,indue!ing P and S wavevelocities at normal temperatures,dynamic and clastic parameters relation with density andtheir changing regularity,rock deformation characteristics of statics at triaxial compressioncondition and statics parameters and their relation with pressures, dynamic and staticconversion relationship.Based on the above experiments rcscarchcs,thc paper adjusts the calculation models ofrock mechanical parameters in logging intcrpretation,thc new calculation models to Chang6reservoir and rock mechanical parameters profiles of Chang6were established.By comparing ground Stress calculation models,the paper has taken the Cluster Springmodel as the ground stress calculation formula,and by using the ground stress calculationresults of the fracturing materials,the Cluster Spring model was adjusted,so ground stressprofiles were established.By using the microseisms materials,it was conifrmed that thedirection of the ground stress.Through analyzing distribution of stress on borehole, using previous cracking pressureand collapse pressure calculation formula,three pressure proifles of single well for Chang6had been established.

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