1) gravitation collapse
引力坍塌
2) caving pressure
坍塌压力
1.
Then breakdown pressure,caving pressure and drilling fluid density can be obtained,which will act as references for drilling design to guide safe drilling.
文章利用声波、密度测井资料计算了岩石力学参数、岩石强度参数,在此基础上进行了地应力计算、进而确定了地层破裂压力和坍塌压力,预测了安全钻井液密度范围,为钻井设计提供参考,并可指导安全钻井。
2.
Based on logging data and the results of formation fracturing tests, a set of methods of calculating the caving pressure and related physical and mechanical characteristic parameters of formation are established.
为了能充分利用测井等资料较精确地计算井壁受力状态和井壁坍塌压力 ,以设计合理钻井液密度窗 ,保证钻井过程中井壁稳定性 。
3) collapse pressure
坍塌压力
1.
Based on the comprehensive analysis of some complicated situations met in drilling,such as circulation loss,borehole shrinkage and collapse,the collapse pressure and fracture pressure of the drilled well interval were determined.
综合分析钻井过程中通常遇到的井漏、缩径和坍塌等复杂情况,确定已钻层段的坍塌压力和破裂压力,结合神经网络理论建立地震层速度与坍塌压力、破裂压力之间的非线性映射关系,提出利用地震资料钻前预测勘探构造第1口井二开以下地层井壁稳定性的方法。
2.
The well collapse pressure of extended reach well and the security density window of drilling fluid was estimated based on the Coulomh-Moore strength criteria and the maximum tension stress fracture criteria.
根据库仑-摩尔强度准则和最大拉应力破裂准则,计算大位移井的井壁坍塌压力与泥浆安全密度窗口。
3.
Water-base drilling fluids usually increase shale collapse pressure, different drilling fluid system brings different increase degree of collapse pressure.
水基钻井液大多要增加地层坍塌压力,且不同钻井液体系引起地层坍塌压力增加的幅度不同。
4) collapsing pressure
坍塌压力
1.
The results from contrasts of collapsing pressures between unhydrated shale and hydrated one indicate that collapsing pressure for shale which behaves poor water sensitivity can be increased on a large scale,and verify the phenomenon exists that shale is stable in early contact with drillng fluid and turns out to be unstable later.
页岩水化前后坍塌压力对比结果表明，水化使泥页岩的坍塌压力持续升高，证实了泥页岩地层在钻遇初期稳定、裸眼一段时间后出现失稳。
2.
Pore pressure,breakdown pressure and collapsing pressure are the bases of determining the casing programme,drilling fluid density and cementing and completion plan,and are important in the design of drilling engineering.
地层孔隙压力、破裂压力和坍塌压力是合理确定井身结构、钻井液密度和固井完井方案的基本依据,是钻井工程设计的一项重要内容。
5) Formation breakout pressure
层坍塌压力
6) caving pressure
地层坍塌压力
补充资料：地层坍塌
分子式：
CAS号：
性质：钻井作业中，地层基岩与钻井液接触水化、膨化、胶结破坏或碎裂剥落(往往在地层倾角较大的井段发生)，使得井壁岩层损坏，这种现象称为地层坍塌或井壁坍塌。发生的原因是钻井液与地层岩石不配伍，滤失量过大，滤液抑制性不良，液柱静压控制不当，环空流速过高，操作失当等诸多物理及化学因素所造成。
CAS号：
性质：钻井作业中，地层基岩与钻井液接触水化、膨化、胶结破坏或碎裂剥落(往往在地层倾角较大的井段发生)，使得井壁岩层损坏，这种现象称为地层坍塌或井壁坍塌。发生的原因是钻井液与地层岩石不配伍，滤失量过大，滤液抑制性不良，液柱静压控制不当，环空流速过高，操作失当等诸多物理及化学因素所造成。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条