Different Tectonic Style Formation Of Argillaceous Rock Pore Space And Characteristics Of Petroleum Migration And Accumulation Research Study

Based on seismic profileanalysis, core analysis and logging analysis, the basic str uctural style and denudationcharacteristics of the formation and the amplitudes of the fault activity are analyzed and their affection to the feature of mud fracturedeveloping are also studiedin western Chaidamu Basin. Further study about how the affection to themud fracturedevelopingstress onoil-gas migration and accumulation are researched for offering the theoretical basisof future exploration activity in western ChaidamuBa sin.The following conclusions are showed in this paper:(1) Formation depth has an important influence, that the elasticity,plasticity and breaking propertygradually changes as the depth changes,on the mud fracturedevelopi ng.(2)Erosion of the overlying strata have a significant impact on the mud fractured eveloping, which are showed in two aspects:the depth of mud fracturedeveloping dec reases due to the erosion of the overlying strata; lower formation compression snaps b ack, the initialmud fracture expands and extends vertically and laterally because of th e the erosion of the overlying strata.(3)The performance of mudstone fracture characteristics’s influence from fractur e’s activity magnitudeis as follows;If a certain period,the fracture activity range is big ger, because thetangential stress of fractureincreases,On both sides of the deeper fract ure’s cross-sectionmay be developing a larger range of broken belt.(4)Structural style of sedimentary play an important role in controllingfor the cra cks’developing in mudstone. Embodied in the structural styles in different strata or dif ferent parts of the same stratum structure,Developmental type and sizeof mudstone cr acks Will exhibit different characteristics.(5)Mudstone cracks as an important channel for hydrocarbon migration and effec tive reservoir,Development Characteristicsof the structural styles in different strata or different parts of the same stratum structureplay an important role in controlling for m igration and accumulation of oil and gas,embodied in there are different hydrocarbon migration and accumulation patterns in different tectonic style formation.