一种新型蒸汽吞吐产能预测解析模型

A New Analytical Model for Productivity Prediction in Steam Soak

介绍一种在Marx-Langenheim模型基础上发展起来的新型蒸汽吞吐产能预测解析模型。该模型沿用蒸汽吞吐分为热油区和冷油区的研究方法,但在热油区采用更符合热传导规律的非等温模型,同时考虑原油粘度,油水相对渗透率的温度敏感性,用能量守恒方程和物质平衡方程分别计算加热区半径、平均压力,然后利用拟稳态渗流方程来预测蒸汽吞吐生产能力。该模型在热油区温度场呈指数变化,更符合油藏实际,同时具有多周期的功能,将计算结果和某油田测试数据对比,符合较好,取得了令人满意的效果,也验证了该模型的有效性。

A new analytical model of production forecast in steam soak was introduced,which was improved based on Marx-Langenheim Model.This model used the predecessors' research methods,which divided the reservoir into two zones such as hot zone and cold zone.A new non-isothermal model was used in the hot zone,which is more consistent with thermal conduction law,and temperature sensitivity of crude oil viscosity and relative permeability was taken into consideration,equations of energy conservation and material balance were used to calculate heating radius and average temperature.Then quasi-steady permeable equation was used to forecast the steam-soaking production capacity.In the model,the temperature field in thermal field changes exponentially,which is more consistent with reservoir conditions,and it has multi-period forecast function.A comparison is made between calculation result is compared with the data of an oilfield,it is matched well with satisfied result,its effectiveness is verified.