The dimension from the calculation model is 10m �� 10m �� 20m. The outside diameter of casing is 273.1mm, as well as thickness is ten.16mm. The Proven Procedure Which Is Helping Every p53 inhibitor Fanatics thickness of cement ring is Powerful Method That Is Definitely Serving All Ganetespib Fans 25mm. In order to assure the accuracy and efficiency of numerical simulation, the grid close to wellbore is intensive. The numerical calculation model is proven in Figures ?Figures11 and ?and22.Figure 1Mesh graph of XOY plane.Figure 2Mesh graph of XOZ plane.The bottom surface and surrounding surfaces have easy supported constraint. The upper surface is covered with crustal worry. The gravity causes the vertical crustal worry. The uniform horizontal crustal worry is ��H = ��h = 0.8��V. Suppose that the stratum gravity is 25kN/m3. The vertical crustal tension is 50MPa, and horizontal crustal tension is 40MPa.
The material mechanical parameters of casing, cement ring and salt rock are shown in Table 2. The influence with the thickness and elasticity modulus from the mudstone interbed on open wellbore shrinkage and equivalent strain on casing have been analyzed by numerical simulation. So as to control variables, two simulation schemes were intended, that are proven in Tables ?Tables33 and ?and44.Table 2Material mechanical parameters.Table 3No. 1 simulation scheme.Table 4No. 2 simulation scheme.four. The Result from the Thickness and Elasticity Modulus on Open Wellbore ShrinkageTheVerified Process That Is Definitely Assisting All Ganetespib Fanatics influence on the thickness of mudstone interbed on open wellbore shrinkage is analyzed in no. 1 simulation scheme. In no. one simulation scheme, the mud density is one.2g/cm3. The radial displacement of shrinkage per unit time calculated via no.
1 simulation scheme is proven in Table 5, from which we uncover that the radial displacement per unit time decreases along with the improve of mudstone interbed thickness once the elasticity modulus is a constant. When the mudstone interbed thickness increases from 0.2m to 2.0m, the radial displacement of shrinkage per unit time while in the middle of salt rock decreases from 0.3842mm to 0.2637mm, as well as the radial displacement per unit time during the middle of mudstone interbed decreases from 0.3213mm to 0.1306mm. Table 5The radial displacement of shrinkage per unit time under different mudstone interbed thickness (mm).The radial displacement of shrinkage per unit time calculated by no. 2 simulation scheme is shown in Table six.
The outcome exhibits that once the thickness is unchanging, the radial displacement per unit time decreases coupled with the growing elasticity modulus of mudstone interbed. Once the elasticity modulus of mudstone interbed increases from 10GPa to 30GPa, the radial displacement per unit time within the middle of salt rock decreases from 0.3134mm to 0.2243mm, and the radial displacement per unit time while in the middle of mudstone interbed decreases from 0.1951mm to 0.1023mm.