薄层特超稠油油藏氮气与降粘剂联合蒸汽辅助重力泄油物理模拟实验  

Physical simulation experiment of nitrogen gas and dissolve solvent aided SAGD for thin formation and extra-super heavy oil reservoir

作　　者：王传飞[1] 吴光焕[1] 韦涛[1] 孙业恒[1] 

机构地区：[1]中国石化胜利油田分公司勘探开发研究院,山东东营257015

出　　处：《油气地质与采收率》2017年第1期80-85,共6页Petroleum Geology and Recovery Efficiency

基　　金：中国石化科技攻关项目"极浅层特超稠油油藏SAGD开发关键技术研究"(P13055)

摘　　要：常规蒸汽辅助重力泄油技术主要适用于油层厚度较大、原油粘度较高的油藏。针对春晖油田哈浅1块油层厚度相对较薄、原油极稠的特点,在常规蒸汽辅助重力泄油的基础上,采用三维物理模拟实验技术,开展通过加入氮气与降粘剂来改善常规蒸汽辅助重力泄油开发效果的实验研究。实验结果表明:采用氮气与降粘剂联合蒸汽辅助重力泄油,能够减缓蒸汽超覆,降低蒸汽腔压力,扩大蒸汽腔有效波及范围,降粘剂在蒸汽的携带作用下,可增大降粘范围和幅度,使得蒸汽腔的发育形态发生质的变化,有效动用油层下部储量;从动态指标来看,氮气与降粘剂联合蒸汽辅助重力泄油比常规蒸汽辅助重力泄油和氮气联合蒸汽辅助重力泄油的累积油汽比分别提高0.036和0.023 mL/mL,采收率分别提高10.9%和6.9%,说明氮气与降粘剂联合蒸汽辅助重力泄油开发效果较好。Conventional SAGD is aimed mainly for the heavy oil reservoirs with thick formation and high viscosity. Haqian1 block has the geological features of thin formation and super heavy oil. Based on conventional SAGD,3D physical simulation experiment technology was applied for the research on adding nitrogen gas and dissolve agent to improve the development effect of the conventional SAGD. The results show that nitrogen gas can release the steam overlap and lower the steam chamber pressure,resulting in expanding the effective sweep area of steam chamber. Dissolve agent can decrease the viscosity further with the steam carrying,leading to quantitative change of steam chamber development and producing the reserves of lower reservoir effectively. Nitrogen gas and dissolve solvent aided SAGD can respectively increase the cumulative oil steam ratio by 0.036,0.023 mL/mL,and increase the oil recovery by 10.9% and 6.9%,compared with those of convention SAGD and nitrogen gas aided SAGD. In a word,nitrogen gas and dissolve solvent aided SAGD technology can obtain impressive effect.

关 键 词：特超稠油油藏 物理模拟 蒸汽辅助重力泄油 氮气 降粘剂 蒸汽腔 

分 类 号：TE357.4[石油与天然气工程—油气田开发工程]