摘要
我国各油田套管损坏日趋严重，江汉、中原及华北油田等套管损坏原因主要是盐、膏、泥、页岩等的塑性流动而挤坏套管。这些地层由于将产生较大的非均匀载荷，通过增加套管的强度来抵抗极限条件下的非均匀载荷是办不到的［１］，若采用增加套管壁厚，这使得套管尺寸非标准化，且其重量可能超过钻机负荷。文章对这些非均匀载荷作用的地层采用双层组合套管，根据油田具体情况、套管货源以及套管标准系列进行了优化设计，提供了按压力传递系数最小为目标函数的优化设计软件，并成功地应用于华北油田荆丘地区膏、泥、页、盐岩等塑性流动地层的井段。
The casing damages in oil fields in China are gradually serious. The reasons for the damages in the fields of Jianghan, Zhongyuan and Huabei are that the casings are extruded by the plastic flow of salt rock, cream rock, shale etc. Because that there are large non-uniform loads in the above formations, it is impossible by increasing the intensities of the casings to withstand the loads inlimit conditions. Increasing the wall thickness of the casings will leed to the casings non-standard and add the loads of drilling rig. In the light of the situations in the fields, the supply and standards of casingS, optimizing design has been done by the use of bilayer pattern casings in the formations with non-uniform loads to provide the optimizing design software of object function when pressure transfer coefficient is smallest. The software has been successfully applied in the formations of cream rock, salt rock and shale with plastic flows in Jingqiu area of Huabei oil field.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
1995年第1期36-39,共4页
Natural Gas Industry
关键词
套管
优化设计
压力
油田
Pattern, Casing, Optimizing design, Pressure coefficient.
