Development of monitoring of steam chamber for oilsand SAGD product plant

为了提高油田和SAGD采油厂的生产效率，我们开发了模拟技术：(1)产量预测模拟技术的发展；(2)含硫气体混相地层动态的讨论；(3)地面注汽变形的估算；(4)裂缝型油藏可动性监测。两项研究证实，选择合适的三相相对渗透率模型对SAGD产量预测非常重要。从模拟结果中，我们可以评估增加硫化氢对细长管内置换效率的提高。同时还发现了高压条件下和高密度硫化氢气条件下形成混溶过程的差异，通过监测地表变形来评价SAGD方法的有效性。为了估算注汽热膨胀的空间和数量，我们进行了基础实验室和数值实验；为了估算最佳平均裂缝间距，进行了流体体积和频率控制下的压力变化试验的数值研究。讨论了注水频率和水力参数对注水井与监测井压力变化的影响。该方法被应用于北海道森区热区正弦流体体积的测试，以及秋田福黑区和住川地区的连续恢复数据。发现井间介质为裂缝类型，并估算了平均裂缝间隔。

We developed the simulation technique in order to improve the efficiency in oilsand SAGD production plant.(1) Development of technique of production prediction simulation.(2) Discussion of behavior of miscibility formation by sour gas injection(3) Estimation of surface deformation by steam injection(4) Monitoring of mobiability in fracture type reservoirsAbove studies confirmed that it is very important for SAGD production prediction to select proper three phase relative permeability model.We built the multi-component flow model to simulate slim tube test in order to estimate the minimum miscibility pressure. From the simulation results we are able to evaluate the increasing of efficiency of replacement in slim tubes by increasing of Hydrosulfide. We also find the difference of process of forming miscibility between under a condition of high pressure and under that of high density of hydrosulfide.We are able to evaluate the efficiency of SAGD method by estimating the behavior of steam injected into subsurface by monitoring the surface deformation. To estimate the space and amount of thermal expansion by steam injection, we carried out basic laboratory and numerical experiments.In order to estimate optimal average fracture interval, numerical studies of pressure changing test under controlling of volume and frequency of fluid are carried out. We discussed injection frequency and hydro parameters for pressure changing between injection wells and monitoring wells. This method is applied to test data of sinusoidal fluid volume in the thermal area in Mori, Hokkaido, and to continuous restored data in Fukuro and Sumikawa area in Akita. We found the media between wells is fracture typed and estimated the average fracture interval.