石油钻采工艺2016，Vol.38Issue(6)：782-786,5.DOI:10.13639/j.odpt.2016.06.013
套管封固段变形对高温高压井环空圈闭压力影响规律
Casing deformation of cemented portions effect on the annular pressure buildup for hthp gas wells
摘要
Abstract
During the drilling and production of HTHP (high temperature and high pressure) well, its safety is seriously inlfuenced by the annulus trap pressure which is induced by the closed annulus lfuid due to thermal expansion. And the annulus trap pressure is in close relation with the closed annulus volume change. In order to analyze the effect of the deformation of casing cementing section on the annulus trap pressure, a casing-cement sheath-strata compatible deformation model was established according to the elastic deformation theory. Then, a multi-string annulus trap pressure calculation model was developed by analyzing annulus lfuid parameters and casing deformation comprehensively. Finally, a case study was carried out to analyze the inlfuence laws of casing deformation on annulus trap pressure. It is shown that when the deformation of casing cementing section is taken into account, the predicted annulus trap pressure is 13%lower and it is closer to the ifeld measurement. This research plays an important and practical role in guiding the casing string design and safe production of HTHP wells.关键词
高温高压井/环空圈闭压力/固井段/套管变形/环空体积变化Key words
HTHP well/annulus trap pressure/cementing section/casing deformation/annulus volume change分类
能源科技引用本文复制引用
董星亮,刘书杰,谢仁军,张兴全..套管封固段变形对高温高压井环空圈闭压力影响规律[J].石油钻采工艺,2016,38(6):782-786,5.基金项目
国家自然科学基金“深水高温高压井钻采过程中密闭环空压力预测和套管柱力学研究”项目（编号51504284）。 （）
