改进的蒸汽吞吐渗流-地质力学耦合模型  

An improved coupled flow-geomechanical model for cyclic steam stimulation

作　　者：JAMALOEI Benyamin Yadali JAMALOEI Benyamin Yadali(Murphy Oil Corporation,Calgary T2N 1N4,Canada)

机构地区：[1]墨菲石油公司,卡尔加里T2N 1N4,加拿大

出　　处：《石油勘探与开发》2023年第5期1049-1055,共7页Petroleum Exploration and Development

摘　　要：综合考虑蒸汽吞吐过程中地层膨胀和再压实诱发的孔隙变形和渗透率变化,改进了现有地质力学模型并与渗流方程进行热力学耦合,形成渗流-地质力学耦合模型,将耦合模型与响应面法和拉丁超立方体设计相结合,进行敏感性分析和不确定性评价,量化地层膨胀-再压实参数对蒸汽吞吐效果的影响。研究表明,改进的渗流-地质力学耦合模型可以更准确地实现注汽压力、注汽量及油水产量的历史拟合;线性模型和二次模型中,再压实压力的升高对注汽量和产水量的增加影响最明显,压缩系数、再压实压力与注汽量和油水产量正相关,膨胀压力与注汽量和油水产量负相关;线性模型中,膨胀压力对累计产油量的影响最明显且负相关,压缩系数、再压实压力与产油量正相关;二次模型中,再压实压力对累计油水产量和注汽量影响最明显且正相关;膨胀压力、再压实压力与海绵状岩石压缩系数之间的交互作用对累计油水产量和累计注汽量均具有负面影响。Considering the pore deformation and permeability changes during dilation-recompaction in cyclic steam stimulation(CSS),an existing geomechanical model is improved and thermo-mechanically coupled with the flow equations to form a coupled flow-geomechanical model.The impacts of dilation-recompaction parameters can be quantified through sensitivity analysis and uncertainty assessment utilizing the synergy between Latin hypercube designs and response surface methodology.The improved coupled flow-geomechanical model allows a more reasonable history-matching of steam injection pressure and volume and oil/water production volume.In both the linear and quadratic models,the rise in recompaction pressure has the most significant effect on the rise in the volumes of steam injection and water production,both rock compressibility and recompaction pressure are positively correlated with steam injectivity and oil/water production,and the dilation pressure is negatively correlated with steam injectivity and oil/water production.In the linear model,dilation pressure has the most significant negative impact on the cumulative oil production,and compressibility and recompaction pressure are positively correlated with oil production.In the quadratic model,the rise in recompaction pressure has the most significant effect on the rise in the cumulative volumes of oil/water production and steam injection.The interactions between the dilation/recompaction pressures and spongy-rock compressibility negatively affect the cumulative volumes of oil/water production and steam injection.

关 键 词：稠油开发 蒸汽吞吐 渗流-地质力学模型 海绵状岩石法 膨胀-再压实 历史拟合 

分 类 号：TE357[石油与天然气工程—油气田开发工程]