CAJ | 학술논문

针对华庆油田元284区微裂缝相对发育、水驱效果差的特点,拟采用空气泡沫驱进行水驱后进一步提高采收率,为此,通过模拟研究区实际的油藏特点,进行了泡沫流动实验,研究了气液比、渗透率、温度、注入流速、渗透率级差等因素对泡沫在多孔介质中的流动阻力的影响. 结果表明,最佳的注入气液比是1:1,注入流速是20 m3/d,泡沫流体在多孔介质中的阻力因子随着渗透率的增大而增大,随着含油饱和度的增加而降低,含油饱和度超过30%时,泡沫将无法形成较好的封堵. 泡沫流体的这种特性可以使其在剩余油饱和度较低的高渗透层及微裂缝内形成较好的封堵,从而起到调驱的作用.
침대화경유전원284구미렬봉상대발육、수구효과차적특점,의채용공기포말구진행수구후진일보제고채수솔,위차,통과모의연구구실제적유장특점,진행료포말류동실험,연구료기액비、삼투솔、온도、주입류속、삼투솔급차등인소대포말재다공개질중적류동조력적영향. 결과표명,최가적주입기액비시1:1,주입류속시20 m3/d,포말류체재다공개질중적조력인자수착삼투솔적증대이증대,수착함유포화도적증가이강저,함유포화도초과30%시,포말장무법형성교호적봉도. 포말류체적저충특성가이사기재잉여유포화도교저적고삼투층급미렬봉내형성교호적봉도,종이기도조구적작용.
Because of the developed micro-frature and poor waterflooding effect,air foam flooding will be injected after waterflooding to further enhanced oil recovery. For this reason,through foam flow experiment,the influential factors of gas fluid ratio,permeability,injecting rate and oil saturation are studied. The experiment result showed that the apparent viscosity of foam in porous media is augmented with the increase of permeability ,and blocking ability of foam in high permeability core is larger than that in low permeability core ,the resistance factor of foam in porous media is augmented with the increase of injecting rate,and it is suggested that the optimal injecting rate of flow was 20 m3/d,larger blocking pressure difference can noe be formed when oil saturation is above 30%.