气-液-固变相态复杂渗流微观实验研究  

Microscopical experimental investigation on complex flow with gas-liquid-solid phase change through porous media

作　　者：朱维耀[1] 孙玉凯[2] 燕良东[3] 宋洪庆[1] 胡永乐[3] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]中国科学院广州地球化学研究所,广州510640 [3]中国石油勘探开发研究院,北京100083

出　　处：《北京科技大学学报》2009年第11期1351-1356,共6页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(No.10772023);国家重点基础研究发展计划资助项目(No.2007CB209506)

摘　　要：利用微观可视化渗流实验对凝析气藏衰竭开发过程的反凝析过程中气-液-固复杂流动的渗流规律进行研究,通过高温、高压条件仿真微观可视化模型模拟地层凝析气-液-固流动,直接观测凝析气、液、固(蜡)相的渗流特征和运移机理.给出蜡沉积吸附和运移规律,孔隙介质中气-液-固(蜡)流动规律,气、液、固(蜡)相变化和分布特征.归纳凝析油流动方式为携带、贴壁爬行、界面流、脉冲流、段塞流、溪状流、连续流、小液滴随大液滴和液流汇聚的运移规律.提出蜡沉积吸附在多孔介质表面.一种从气相中析出,直接以片状吸附在多孔介质表面.另一种是蜡在液相中以絮状物析出并影响液相流动.固相蜡析出使孔隙结构发生变化,孔隙半径变小,出现气、液、固多相流动,流动阻力增大.An microscopical experimental method was brought out to study the flow law and flow rules of gas-liquid-sold complex flow in condensate reservoirs with wax deposition. Real porous media were modeled by the phantom micro-model with similar pore structure. The experiments were carried out in porous media at high temperature and high pressure to observe the forming, distribution and flow rules of gas-liquid-sold complex flow. The results show the adsorption and migration laws of wax deposition, three-phase flow pattern, phase change and distribution characteristics of porous media. It is difficult to accumulate for the condensate in big pores. The flow mode of the condensate includes mainly eight styles： schlepping by gas, pulse flow, crawling along pore wall, interface flow, plug flow, rivulet flow, continuous flow, and little liquid droplets assembling with bigger liquid droplets and liquid flow. The results also indicate that wax deposition adsorbs at pore surfaces. Some is from gas phase and adsorbs on the surfaces of porous media with sheet, the other is from liquid phase with flock and affects the flow. Pore structures are affected by solid wax precipitation. The smaller the pore structure, the more the wax adsorption, and the resistance of the gas-liquid-solid flow increases.

关 键 词：蜡沉积 凝析液 吸附 运移 流动方式 流动特征 

分 类 号：TE357.4[石油与天然气工程—油气田开发工程]