侯大力,罗平亚,孙雷,乐潇,陈亮,卢斐
HOU Dali,LUO Pingya,SUN Lei,LE Xiao,CHEN Liang,LU Fei

• 1:西南石油大学油气藏地质及开发工程国家重点实验室
• 2:中国石油塔里木油田分公司勘探开发研究院
• 3:中国石油新疆油田分公司勘探开发研究院

摘要(Abstract)：

以X油田S井近临界的地层流体为研究对象,利用可实时监测且可录像的DBR-PVT实验装置进行实验,为研究近临界复杂流体的相态特征及热力学模型提供基础数据。等组成膨胀实验测试了近临界流体在不同温度下的饱和压力,不同温度压力条件下的偏差因子、反凝析液量和临界点区间,并结合CMG相态模拟软件中1978年改进的PR状态方程拟合实测的泡/露点,得到完整的p-T相图和临界点;光学现象观测实验发现,近临界区流体具有"临界乳光"现象,流体从透明的金黄色渐变为浅棕色、红棕色,最后扩展为完全不透光的灰黑色;定容衰竭实验测试了衰竭过程中地层流体采出程度、反凝析液量、采出流体的组分变化和衰竭前后井流物p-T相图变化。
Taking the near-critical fluids of the formations of Well S of Oilfield X as the researched object,the experiment is conducted with the help of live-monitoring and video-recording DBR-PVT apparatus,thus the basic data for the studies of the phase characteristics of the near-critical complex fluids and thermodynamic model can be provided.Z-factosr at different temperatures and pressures,retrograde condensed liquid yield and the interval of the near-critical points are tested for the near-critical fluids in the constant composition expansion(CCE) experiment,and at the same time integrating with the improved PR state equation in 1978 in CMG phase-behavior simulating software,the actually measured bubble/dew point is matched,and then the complete p-T phase diagram and critical point are obtained;the observation experiment of the optical phenomenon finds out that the fluids near the nearcritical area possesses a "critical opalescence" phenomenon,the colors of the fluids gradually change from transparent golden yellow to shallow brown,red brown and in the end expand to completely opaque to black;the recovery of the formation fluids,yield of the retrograde condensed liquid,changes of the produced liquid compositions and p-T phase diagram of the fluids from the well before and after the depletion are tested in the process of the depletion.

关键词(KeyWords)： 近临界;凝析气藏;动态;相态行为;p-T相图;无汞PVT仪;CMG相态模拟
near critical;condensate gas reservoir;dynamic;phase behavior;p-T phase diagram;no-mercury PVT instrument;CMG phase-behavior simulation

Abstract:

Keywords:

基金项目(Foundation): 国家重大专项“凝析气藏开发新技术研究”(2011B-1507)

作者(Author): 侯大力,罗平亚,孙雷,乐潇,陈亮,卢斐
HOU Dali,LUO Pingya,SUN Lei,LE Xiao,CHEN Liang,LU Fei

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