Development of monitoring of steam chamber for oilsand SAGD product plant

为了提高油砂SAGD生产装置的生产效率，开发了模拟技术。(1)产量预测模拟技术的发展。(2)注酸气探讨混相储层动态(3)注蒸汽估算地表变形(4)裂缝型储层可动性监测以上研究证实，选择合适的三相相对渗透率模型对SAGD产量预测具有重要意义。为了估算最小混相压力，我们建立了多组分流动模型来模拟细管试验。从模拟结果可以评价增加硫化氢对细管置换效率的提高。在高压条件下与高浓度硫化氢条件下形成混相的过程也存在差异。通过对地表变形的监测，估计地下注汽的动态，可以评价SAGD方法的有效性。为了估算注汽热膨胀的空间和量，我们进行了基础的室内实验和数值实验。为了估计最佳平均裂缝间隔，进行了流体体积和频率控制下的压力变化试验数值研究。讨论了注水井与监测井间压力变化的注水井频率和水力参数。将该方法应用于北海道森热区正弦流体体积测试数据，以及秋田福古和住川地区连续恢复数据。发现井间介质为裂缝型，并估计了平均裂缝间隔。

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.