Chinese Copy of Squeeze中英文.ppt

SQUEEZE CEMENTING挤水泥固井 DEFINITION定义 Squeeze Cementing is the process of applying hydraulic pressure to force or squeeze a cement slurry into the desired perforations, fractures, channels, or voids and force filtrate water from the slurry to create a solid mass which will harden to provide the desired seal. 挤水泥固井是指使用液体压力将水泥浆挤入要求的射孔，裂缝，窜槽，或者孔隙，使水泥浆失水，形成坚硬的固体，达到预期的密封作用。 Squeeze Cementing is as much an Art as it is a Science. Area Experience is essential. 挤水泥固井做为一门技术，其实也是一门艺术。需要现场经验。 PROBLEM DETERMINATION考虑因素 Why Are We Squeezing? 为什么挤水泥固井 Repair mud or gas channeling on primary cement job 固井作业前期修复泥浆槽或者窜槽 Isolate a formation prior to perforating 射孔前首先隔离地层 Insufficient top of cement on primary job 初期固井残留的顶部封固不充分问题 Repair casing leak 修复套管漏失 PROBLEM DETERMINATION考虑因素 What Criteria Should We Use For Determining The Need For A Squeeze Job? 决定使用挤水泥固井技术的标准 Sonic evaluation logs 声波评价测井 Primary cement job design 初级固井作业设计 Primary cement job performance 初级固井作业的实施情况 Flow rate 流速 Centralization 居中 Mud properties 泥浆性能 Experience 经验 Offset well data 临井资料 PROBLEM DETERMINATION考虑因素 Will A Squeeze Job Do What We Want It To? 挤水泥固井是否能达到预期的效果 Most voids and channels will be fluid-filled. 大多数孔隙和窜槽被流体填充 Mud channels must be displaced for squeeze to work. 必须对泥浆槽进行置换，为固井作业提供条件 Most channels cannot receive cement slurry under squeeze pressure. 大多数窜槽因受挤入压力而无法接受水泥浆 High pressure squeeze increases formation stress around the wellbore. 高压挤入增加了井眼周围的地层应力 MYTHS IN SQUEEZE CEMENTING挤水泥固井的神话 MYTH - CEMENT SLURRY ENTERS THE FORMATION MATRIX神话-水泥浆进入地层基岩 Cement average particle size 20-50 microns 水泥浆颗粒颗粒尺寸为20-50微米 2000 md formation permeability required 需要渗透性大于2000md的地层 Fact - Cement particles are too large to enter the matrix of most formations except in cases of extremely high permeability or fractures. 需面对的事实-水泥浆颗粒太大，不能进入大多数地 层的基岩，除非是高渗透性地层 Fact