The Design Study Of Micro-pore Structure Of Resorvior And The Damage Of Fracturing Fluid

At present， more than60percent of our country newly found oil reserves are lowpermeability， ultra-low permeability (k＜1md) reservoir. This phenomenon is more obviousin Jilin oilfield. With the speeding up of the increasement in oil reserve and production， thedevelopment and effective utilization of low permeability， ultra-low permeability reservoirhas become the important problem. How to employ the reserves which is difficult to use anddevelop the inefficient reserves effectively， that come up with higher requirements onengineering technology. Only to emancipate the mind， renew the idea， break the routine，advancing with the times， attaches great importance to the theoretical knowledge andtechnology innovation， which will achieve the efficient development of low permeability，ultra-low permeable oil fields. Therefore， researching the geological characteristics of lowpermeable oil fields in reservoir physical characteristics and seepage characteristics， find outthe primary cause of the influence of reservoir porosity， permeability.On the basis of geological knowledge， this paper combines the actual conditions offracturing technology research， determine to reservoir microscopic pore structure，reservoir， cement， non-darcy flow， the relationship between relative permeability andpermeability of reservoir as the research direction has carried out a series of research work，and studied the relationship of the compatibility of fracturing fluid filtrate and pore throat sizeof rocks， fracturing fluid damage research， and to carry out the enzyme breaker testresearch， improves the flowback rate of fracturing fluid.At the same time， carried out thework of established the optimization project of the relationship of fracture length， flowconductivity and permeability in different permeability condition.