摘要
以稠油油藏为研究对象,针对水平井过热蒸汽吞吐产能预测问题,通过引入过热蒸汽状态方程,结合拟稳态产能公式,建立了完整的产能预测模型。研究了定液条件下,加热区压力、产能变化规律和不同注汽参数对采出程度的影响。研究表明,定液生产初期加热区压力迅速下降,产能基本不变;生产后期压力下降缓慢,产能迅速下降。注汽参数优化表明,采出程度随过热度增加,先迅速增加后缓慢增加;随周期注汽量增加,先迅速增加后缓慢下降。该模型对过热蒸汽吞吐水平井的注汽参数选取及产能预测具有重要意义。
A complete productivity forecast model is established by introducing superheated steam state equation and combining with quasi-steady productivity equation to forecast the productivity of horizontal well with superheated steam huff- puff treatment in heavy oil reservoir. The steam hotspot pressure and productivity and the effects of steam injection parameters on reservoir oil recovery degree are researched under constant liquid production.Research shows that the steam hotspot pressure rapidly decreases in the early stage of constant liquid production with almost constant well productivity.The steam hotspot pressure decreases slowly in the late stage of constant liquid production with rapid decline of well productivity. Steam injection optimization illustrates that the recovery degree rapidly increase in the early stage and slowly in the late stage with the increase of superheat level. The recovery rapidly increases in the early stage and slowly decreases in the late stage with the increase of cyclic steam injection volume. This research could provide a significant reference for the steam injection optimization of horizontal well with superheated steam huff-puff treatment in heavy oil reservoir.
出处
《特种油气藏》
CAS
CSCD
北大核心
2016年第3期122-125,157,共4页
Special Oil & Gas Reservoirs
基金
国家科技重大专项"大型油气田及煤层气开发"(2011ZX05012-004)
关键词
稠油热采
过热蒸汽吞吐
产能评价
水平井
KMK油田
thermal recovery
superheated steam huff-puff
productivity evaluation
horizontal well
KMK Oilfield
