泥页岩水化对岩石力学参数的影响  

The Effect of Mud-shale Hydration on Rock Mechanic Parameters

作　　者：吴超[1] 罗健生[1] 田荣剑[1] 刘刚[1] 李怀科[1] 张兴来[1] 

机构地区：[1]中海油田服务股份有限公司,河北三河065201

出　　处：《石油天然气学报》2012年第4期147-150,170,共4页Journal of Oil and Gas Technology

摘　　要：根据泥页岩吸水扩散系数测试方法,在模拟井下温度和压力条件下,测定了现场泥页岩岩心在不同钻井液体系中的吸水率,计算了泥页岩吸水扩散系数,并通过泥页岩水化前后岩石弹性模量、内摩擦角、粘聚力及岩石强度的变化,揭示了钻井液在泥页岩地层中的渗透运移规律,为保证现场正常钻进及井壁稳定提供了一定的理论依据。On the basis of detecting method of mud-shale absorption and diffusion and by simulation of down-hole temperature and pressure,the mud-shale absorption ratio in different drilling fluids was detected,the mud-shale absorption and diffusion index was calculated.In addition the core's elasticity modulus,its internal friction angle,adhesive power and core intensity before and after its hydration were studied,the law of drilling fluid pervasion and immigration in formation was presented.It provides theoretical reference for successful operation of drilling fluid and wall sloughing.

关 键 词：泥页岩 水化 吸水扩散系数 岩石力学参数 

分 类 号：TE21[石油与天然气工程—油气井工程]