CAJ | 학술논문

特低渗透油藏由于物性条件差,单井产量低,稳产期短,甚至没有稳产期直接进入递减期。从单井产量递减率的定义出发,推导出影响单井产量递减率因素的方程,同时结合长庆油田S392区长6特低渗油藏的矿场生产资料,运用正交试验方法分析各因素对单井产量递减率的影响程度。研究结果表明：影响特低渗透油藏单井产量递减率的因素主要有油层有效出油厚度、有效生产压差、单井生产时间、油水流度和、含水率、供给半径等;在这些因素中影响程度最大的是油水流度和,其影响程度为47.54%,其次是含水率和油层有效厚度,分别为17.83%和10.14%。
특저삼투유장유우물성조건차,단정산량저,은산기단,심지몰유은산기직접진입체감기。종단정산량체감솔적정의출발,추도출영향단정산량체감솔인소적방정,동시결합장경유전S392구장6특저삼유장적광장생산자료,운용정교시험방법분석각인소대단정산량체감솔적영향정도。연구결과표명：영향특저삼투유장단정산량체감솔적인소주요유유층유효출유후도、유효생산압차、단정생산시간、유수류도화、함수솔、공급반경등;재저사인소중영향정도최대적시유수류도화,기영향정도위47.54%,기차시함수솔화유층유효후도,분별위17.83%화10.14%。
Because of poor physical property of ultra-low permeability reservoir,there is lower single well production,shorter stable production period,and directly entering decline period even without stable production period.According to the definition of single well production decline rate,an equation,which includes factors of influencing decline rate for single well production,is derived.Combining with production data of Chang 6 ultra-low permeability reservoir of S392 area in Changqing Oilfield,the influencing degree of various factors on single well production decline rate is analyzed by the orthogonal test method.The results show that the influencing factors consist of effective thickness,effective production pressure difference,the single well production time,the sum of oil and water mobility,water cut,and supply radius.The first one is the sum of oil and water mobility,which contributes to a 47.54% of the influencing degree.The second one is water cut and effective thickness,which contribute to 17.83% and 10.14% of the influencing degree,respectively.