浅薄层特稠油油藏大井距蒸汽吞吐转蒸汽驱先导试验

Pilot Test of Converting Steam Huff and Puff to Steam Drive in Shallow and Thin Extra Heavy Oil Reservoirs with Large Well Spacing

针对春风油田浅薄层特稠油油藏高轮次吞吐阶段后单井产能低,产量递减大,油汽比低,动用不均衡等问题,对排612块试验区开展蒸汽驱先导试验,运用数值模拟和油藏工程方法,对蒸汽吞吐后转蒸汽驱合理井网井距、转驱时机及注采参数等指标进行优化。研究结果表明,浅薄层特稠油油藏大井距蒸汽吞吐转蒸汽驱是可行性的,开展蒸汽驱8个月,阶段产油0.68×10^(4)t,油气比0.07,试验取得一定的效果,为同类型油藏开展蒸汽驱提供一定的借鉴意义。

In view of problems such as low single well productivity,large production decline,low oil steam ratio and unbalanced production after high round huff and puff in shallow and thin extra heavy oil reservoirs in Chunfeng Oilfield,steam drive pilot test is carried out in Pai 612 block test area,and numerical simulation and reservoir engineering methods are used to optimize such indicators as reasonable well pattern and well spacing,timing of conversion to steam drive,and injection production parameters after steam huff and puff.The research results show that it is feasible to convert large well spacing steam huff and puff to steam drive in shallow and thin extra heavy oil reservoirs.The steam drive has been carried out for 8 months,with a staged oil production of 0.68×10^(4)t and an oil gas ratio of 0.07.The test has achieved certain effects,which provides some reference for steam drive in the same type of reservoirs.