With k_8/k_(16), the ratio of the hydrolytic rate-constants of p-nitrophenyl octanoate (C8) to hexadecanoate (C16), as the indicator of the degree of aggregation, the linear dependence of the deg- ree of aggregation o...With k_8/k_(16), the ratio of the hydrolytic rate-constants of p-nitrophenyl octanoate (C8) to hexadecanoate (C16), as the indicator of the degree of aggregation, the linear dependence of the deg- ree of aggregation on solvent aggregating power (SAgP) has been established in five aquiorgano sol- vents, each within a certain range of volume fraction ( values) of the organic cosolvent. The mea- ning of this linearity has been discussed.展开更多
杜84块兴Ⅵ组SAGD先导试验区经过8年开发,水平生产井水平段上覆储量采出程度已达70%,进入SAGD开发后期,存在问题较多,主要表现为蒸汽腔压力高、蒸汽用量大,蒸汽腔热损失大、热能利用率低,蒸汽腔进入下降阶段、泄油效率低,且油汽比降至0....杜84块兴Ⅵ组SAGD先导试验区经过8年开发,水平生产井水平段上覆储量采出程度已达70%,进入SAGD开发后期,存在问题较多,主要表现为蒸汽腔压力高、蒸汽用量大,蒸汽腔热损失大、热能利用率低,蒸汽腔进入下降阶段、泄油效率低,且油汽比降至0.15,继续采用SAGD开发已不经济。为改善兴Ⅵ组SAGD先导试验区效果,探索利用SAGP(Steam And Gas Push)方式,向蒸汽腔注入氮气,利用氮气填充蒸汽腔,从而减少蒸汽注入量、降低热损失、提高泄油效率,改善油汽比。根据兴Ⅵ组SAGD先导试验区实际情况,对蒸汽及氮气注入量等参数设计优化,最大限度减少蒸汽用量,提高油汽比,方案设计油汽比由0.15提高至0.30。经过半年的现场实施,试验区各项开发指标明显改善,油汽比达到0.33;监测资料显示汽腔顶部形成低温氮气层,有效降低了热损失;措施实施后已累计创效1402万元。SAGP的成功实施为后SAGD阶段探索出可行的接替技术。展开更多
基金Project supported by the National Natural Science Foundation of China.
文摘With k_8/k_(16), the ratio of the hydrolytic rate-constants of p-nitrophenyl octanoate (C8) to hexadecanoate (C16), as the indicator of the degree of aggregation, the linear dependence of the deg- ree of aggregation on solvent aggregating power (SAgP) has been established in five aquiorgano sol- vents, each within a certain range of volume fraction ( values) of the organic cosolvent. The mea- ning of this linearity has been discussed.
文摘杜84块兴Ⅵ组SAGD先导试验区经过8年开发,水平生产井水平段上覆储量采出程度已达70%,进入SAGD开发后期,存在问题较多,主要表现为蒸汽腔压力高、蒸汽用量大,蒸汽腔热损失大、热能利用率低,蒸汽腔进入下降阶段、泄油效率低,且油汽比降至0.15,继续采用SAGD开发已不经济。为改善兴Ⅵ组SAGD先导试验区效果,探索利用SAGP(Steam And Gas Push)方式,向蒸汽腔注入氮气,利用氮气填充蒸汽腔,从而减少蒸汽注入量、降低热损失、提高泄油效率,改善油汽比。根据兴Ⅵ组SAGD先导试验区实际情况,对蒸汽及氮气注入量等参数设计优化,最大限度减少蒸汽用量,提高油汽比,方案设计油汽比由0.15提高至0.30。经过半年的现场实施,试验区各项开发指标明显改善,油汽比达到0.33;监测资料显示汽腔顶部形成低温氮气层,有效降低了热损失;措施实施后已累计创效1402万元。SAGP的成功实施为后SAGD阶段探索出可行的接替技术。
