Study On Damage Mechanism And Fracturing Technology Of Sensitive Tight Gas Reservoir

In recent years,with the recovery and development of the world economy,the global demand for oil and gas is increasing,and the direction of oil and gas exploration is gradually changing from conventional resources to unconventional resources.China is rich in tight gas resources,accounting for about a quarter of the natural gas reserves.However,due to the strong heterogeneity of the tight gas reservoir formation,the complex relationship between gas and water in the formation,and the general poor physical properties of the reservoir,the gas well production is relatively low,the decline rate is fast,the development technology requirements are relatively high,and the high investment and operation costs also seriously restrict the development of tight gas reservoir benefits Hair.Jilin oilfield is a typical "three low" oilfield.In recent years,natural gas resources have been newly discovered,mainly resulting in dense gas.It has been proved that undeveloped natural gas is also mainly due to dense gas.Jilin tight gas has the characteristics of strong sensitivity,complex lithology of overlying strata,large burial depth,strong heterogeneity,low permeability and porosity of reservoir,and the effect of conventional transformation is poor,which can not achieve the ideal development effect,which seriously restricts the development of natural gas business in Jilin Oilfield.Taking the sensitive tight gas reservoir in Jilin Oilfield as an example,this paper systematically evaluates the physical properties,fluid characteristics,rock fracture forming ability,fluid production mechanism and main damage factors of the gas reservoir by using advanced instruments and equipment,conducts in-depth research on the damage mechanism,transformation potential and transformation effect evaluation method of the sensitive tight gas reservoir,and then puts forward the transformation technology of the sensitive tight gas reservoir The operation route and the countermeasures to improve the effect of reconstruction can promote the rapid development of natural gas in Jilin Oilfield,and provide an important reference scheme for the development of similar sensitive tight gas reservoirs.