渤海油田稠油水平井蒸汽吞吐油藏经济技术界限研究及应用

A study and application of the economic-technical limit of huff and puff in horizontal wells for heavy oil reservoirs in Bohai oilfields

将渤海油田稠油油藏按照原油粘度大小划分为4种类型,选取某典型稠油油藏,通过数值模拟方法研究了水平井蒸汽吞吐开发方式下不同类型稠油油藏开发效果与油藏深度、有效厚度、纯总比、含油饱和度、油藏渗透率等油藏因素的影响规律;通过回归技术经济指标与影响因素的定量关系,得到了渤海稠油水平井蒸汽吞吐油藏经济技术界限,并对该典型油藏热采效果和渤海稠油油藏热采潜力进行了预测,所获得的研究成果可为海上稠油实施蒸汽吞吐和其他热采方式提供技术依据和指导。

Bohai heavy oil reservoirs can be divided into four types by their oil viscosity, and a typical heavy oil reservoir was chosen to study the development effect of huff and puff in horizontal wells and the impacts of va rious reservoir factors, such as depth, effective thick ness, nettogross ratio, oil saturation and permeabili ty, by numerical simulation. The economictechnical limit of huff and puff in horizontal wells was obtained for these heavy oil reservoirs by regressing a quantita tive relationship between the economictechnical indica tors and the reservoir factors, and the thermal recovery effect was predicted for this typical heavy oil reservoir and the thermal recovery potential for Bohai heavy oil reservoirs. The results may provide evidences and guides for conducting huff and puff and other thermal recovery in Bohai heavy oil reservoirs.