应力要小于卡瓦材料屈服极限应力，而且顶端卡瓦
牙所承受的应力不能大于卡瓦牙的极限应力。
{στ ≤ ［στ］
（ 15）
σY ≤ ［σ'τ］
4结论
（ 1） 根据有限元计算卡瓦与套管之间的接触应 力，分析得到封隔器坐封状态卡瓦咬入套管深度，从 而计算坐封工况下卡瓦的剪切面积。
（ 2） 通过了解到卡瓦的坐封流程，建立卡瓦力 学模型、分析卡瓦受力，并对卡瓦的剪切强度进行分 析，得到卡瓦剪切强度的计算方法和卡瓦发生损坏 的边界条件。
Abstracts
·Research of Theory ＆ Method·
Analysis of Shear Strength of Completion Packer Slip in HPHT Well． 2016，25（ 3） ： 1 － 3 NAN Rong-li，YANG Xin-ke （ Xinjiang Oilfield Branch Company） ，DOU Yi-hua，CAO Yin-ping （ College of Mechanical Engineering， Xi＇an Shiyou University） ，WANG Xing （ Drilling Engineering Technology Institute，Chuanqing Drilling and Exploration Engineering Co． ，Ltd） As an important part of packer，the slip is used for supporting packer and confining rubber after anchoring． To problems of the casing may be damaged from the slip biting after packer is set，and the slip will be damaged from the shear force of casing，the simplified model of packer slip in high temperature and high pressure wells is established with the consideration of load applied on the slip． Based on the elastic mechanics，the shear strength of the slip is analyzed，the equations of shear strength and slip damage boundary conditions are derived． Also，the depth of slip biting into the casing is analyzed by using the ANSYS software． The research finds that the first four slip teeth almost bear the whole stress，for the one slip tooth，the maximum stress appears at the top of slip teeth，and equivalent stress of the node is decreased gradually comparing with the different location of slip teeth． The Von Mises stress at the whole nodes of the seven slip tooth is too small to be neglected． Key words： high temperature and high pressure，packer，slip，shear strength，analysis Study on Well Testing Method of Water Injection for Oil Well in Fractured Carbonate Rock． 2016，25（ 3） ： 4 － 6，11 ZHU Yi，LUO Shen-chao，WANG Hong，NIU Ge （ Tabei Exploration ＆ Development Project Management Department，Tarim Oilfield Company） ，CHENG Han-lie，WANG Lian-shan （ Hengtai Aipu Oil and Natural Gas Services Co． ，Ltd） Fracture cave combined relationships in the fractured vuggy carbonate reservoir are complex，which have great different influence on water injection development． By study and analysis of the characteristics of different injection single well test in recent years，in accordance with the wells locations，the fracture-cavity position are divided into three categories： cave（ cave + cave） ，fractured + cave、 fractured-vuggy． Through comparative analysis of seepage characteristics and reservoir parameters gained by well testing to the actual effect of water injection，injection effect of well located inside the cave water is the best，oil-water replacement rate is high and raising oil effect is significant． Well located inside the fractured that out of the cave，the crack water breakthrough and soon flooded is easy to produce after water injection for oil production，and injection effect of well located inside the low permeability fractured-vuggy reservoir has the worst effect，a reasonable argument the necessity of water injection should be done． Through the well test analysis of reservoir， the difference of water injection effect is discussed，providing a theoretical basis for water injection． Key words： Halahatang oilfield，fracture-vug reservoir，water injection and oil production，well test，method of selecting well Parameters Optimization of CO2 Flooding in Yaoyingtai Ultra-Low Permeability Oilfield． 2016，25（ 3） ： 7 － 11 LIU Hua，LI Xiang-fang，XIA Jun，YU Peng-liang （ China University of Petroleum（ Beijing） ） ，LIU Hua，LI Peng，Gao Yun-cong （ Northeast Oil and Gas Branch Company） Yaoyingtai oilfield is a low porosity and ultra-low permeability reservoir with low natural productivity，high water cut after fractured，low producing wells or non-producing wells taking a high ratio，low recovery rate，formation pressure dropping quickly and low recovery factor，for which some efficient methods to raise recovery factor should be carried on． As an important EOR method，CO2 flooding can increase recovery significantly． From geological model of Yaoyingtai oilfield，the three dimension geological model is built，and by using numerical simulation method，the key development parameters of CO2 Flooding in Yaoyingtai are optimized． The results show that 40 － 50 t / d is the proper gas injection rate，0． 8 HPCV is the optimized cumulative volume，6 － 7 MPa is the reasonable BHP，and injection pressure should be 20 MPa． Under specific condition，producers should be shut-in for 2 months during gas injection and after a half year of injection，perforations adding should be taken． Key words： ultra-low permeability reservoir，CO2 flooding，parameters optimization，recovery ratio，geological model，numerical simulation，Yaoyingtai oilfield Simulation Study on Flow Field of Nozzle Jet Atomization for Twin Swirl Flow of Oil and Gas Well of Testing Burner． 2016， 25（ 3） ： 12 － 14 PENG Xian-qiang，GUO Zhen-jie，ZHANG Xing-hui （ Well Testing Company，Great Wall Drilling Engineering Co． ，Ltd） ，WANG Jiang-yun （ China Petroleum University，State Key Laboratory of Heavy Oil） As the core components of the burner，structure，atomization manner of the nozzle have much relationship with combustion effect and noise． Using Reynolds stress model and Eulerian two-fluid model，simulation calculation is done to the 3 d jet flow field of test burner on an offshore platform with twin twist flow of oil and gas atomization nozzle，having got flow field information of the internal and external nozzle in detail，to provide theoretical basis for revealing the mechanism of nozzle flow，effectively predicting the atomization characteristics so as to improve the efficiency of oil burning． Key words： testing burner，swirl nozzle，flow field，numerical simulation