Glutinite Reservoir Protection Technology In Yan 22 Block Of Yanjia Oilfied

The paper selected in Dongying northern steep slope areas for the study of Yan 22 instances,through analysis of sedimentary characteristics,issues and analysis of the sensitivity of the formation mechanism of reservoir presence combined with the development process,consider the case of low porosity and low permeability glutinite reservoir,reservoir protection measures in the process of developing low permeability reservoirs is not enough,take wash well,killing and other measures in the drilling and operation process,due to the presence of water affected lock in low permeability reservoirs,leading to the reservoir pollution,after working fluid volume decline or long-term high water content.Therefore,through the Yan 22 block coring wells laboratory analysis,combined with the mine into the well fluid and formation water compatibility test,the block reservoir sensitivity was evaluated,and the corresponding reservoir and reservoir protection measures damage to lift the measures.The comprehensive application of logging and core data,core data analysis carried out from chemical analysis and electron microscopy,understanding hole roar,pore distribution,rock mineral distribution,from the analysis of clay mineral composition,the reservoir has a certain factors of water sensitivity damage exists,in production operations may be due to the salinity of injected water below the reservoir critical salinity caused by water sensitivity damage process;through the study of the water and reservoir rock compatibility,evaluation of injected water circulation process to exist on the water sensitive formation core,scaling the possibility of injury,and to determine the degree of harm;through the development of the reservoir protection and damage to lift experimental research,optimization formulation and the corresponding concentration of water injury treatment,in order to determine the phase matching and block damage relieve agent;in view of the existing reservoir damage factors in many types of work in production process,including the type of solid phase damage,sensitivity damage,water damage,such as scale,put forward measures for reservoir protection necessary in the operation and production process,avoid reservoir the occurrence of injury;the emergence of reservoir damage degree,injection production well,improve coordination and water injection status combined well network,initial Results show that four types of reservoir damage,and carry out corresponding relieve field test,a total of 7 wells,the average single well daily oil 6.9t,cumulative increased oil is 16837 t,has achieved good effect.has achieved good effect.