Key words Tahe Oilfield short radius horizontal well d ynamic drill pipe trajectory control
PROPER APPLIC ATION OF AIR DRILLING IN TABNAK GASF IELD
by Liu Desheng,Zhao Shuguan g(Drilling Fluid Co.,CNPC) Abstract Air and foam drilling fluid system has much more advan tages than the conventional drilling fluid,for it enhances pen etration rate and has good lost circulation control ability.The pene tration rate by air dust drilling in the hard and dry formation can reach16.24m/h,while it is13.16m/h by mist drilli ng when the formation water production is low,and it is6.52m/h when the for mation produces more water and the pressure is relatively higher, which is comparable with that of foam drilling with penetration rate of5.23~6.63m/h.However,slight corrosi on can be caused on d rill pipe by foam drilling,while mist drilling can lead to serious corrosion.Thus suitable d rilling fluid should be selected based on the formation conditions,so that the results of i mproving penetra ti on rate and protecting drill pipe can both be achieved.
Key words mist drilling penetration rate corrosion d rilling fluid
DR ILLING TECHNOLOGY FOR D IRECTIONAL WELLS OF SMA LL D ISPLAC EMENT A ND D EEP KOP
by Dong Yun an,Chen Xiaoyuan,et al(Drilling Dept.of Jiangsu Petroleum Exploration Bureau)
Abstract The directional drilli ng technology described here can mini mize the frequency of adjus ting orientation and chan g in g B HA,thus can cu t down the costs of drilling directional wells ef fectively.This paper focuses on i ts configuration design,determi
83
Vol.25No.1 ABSTRAC T
nation of the initial orientation,well trajectory control and safety drilling technolog ies,etc.This technology has been used in30di rectional wells in Jiangsu Oilfield,with good results achieved, e.
g.,95%of the wells were free of orien tation adjustment,the fre quency of changing B HA for trajectory con trol was dramatically cut down,and the d rilling period was also shortened in certain degree.
Key words Jiangsu Oilfield small displacement deep KOP well configuration well trajectory cost
CEMENTING TECHNOLOGY USING HIGH DENSITY CE MENT IN WELL KAI 2IN QINGHAI OILFIELD
by Li Guibin,Xiu Liuyong,Zhang Zhihu(Drilling Engineer ing Co.,Dagang Oilfield Group Co.)
Abstract Cementi ng in the long isolati on section of large borehole in complex conditions can cause many problems, e.g., gas channelling,lost circulation and blowout,difficul ty of cement slurry returning to the designed depth and ineffective turbulent dis placement,etc.A laboratory test on the performances of high den sity cement slurry was conducted,and thi s test was used to simulate the complex conditions of high pressured salt bed and the coexis tence of high pressured and low pressured formations in Well Kai 2 in Katemeric Structure of Qinghai Oilfield.The high density cement was used for cementing this well,and some associate technolog ies were also applied.The results were satisfactory,and some success ful practices on cementing the long isolati on section of large bore hole in complex condi tions,and gas channelling remedy work around the annular were applied.
Key words Katemeric structure high densi ty cementin g test application
CEMENTING TECHNOLOGY OF COALBED GAS WELL IN QINSHUI BASIN
by Qi Fengzhong(Langfang Branch of Explorati on and Devel op ment Research Inst.),Li Helong,et al
Abstract Qinshui basin is abundant in coalbed gas re sources,while the cementing quality has been kept very poor, which deeply influenced the exploration and evaluation of coalbed gas in this area.The paper presents the characteri stics of coalbed gas cementin g in this area,and proposed the cementing technology suitable for coalbed gas wells.An effective fluid loss control a gent TG,wi th the property of early strength developmen t was also opti mized.The cementi ng technology and cement slurry system have been applied in10wells in Qinshui Basi n and Eerduosi Basi n,and the qualification rate was100%,in which90%of the wells were of good quality.The paper also discussed the problems need to be resolved in coalbed gas well cementing.
Key words coalbed gas cementing lightweight cement cement additive cementing quality
APPLICATION OF NITROGEN SWELLING AGENT IN CEMENTING IN SHENGLI OILFIELD
by Li Yuhai,Diao Shengxian(Yellow River Cementing Co., Shengli Petroleum Adminis tration Bureau)
Abstract Nitrogen swelling agent is vi tal for controlling gas channelling during cementing.The properties,characteristics and working mechanis ms of ni trogen s welling agent were described,and i t was used as gas channelling controlling additive in such blocks as Xianhe,Wang Jiagang,and Shengtuo in Shengli Oilfield.Field using showed that,for such wells as hi gh pressured oil and gas wells,wells of over enlarged borehole,wells with long isolation sections and some special wells,using nitrogen swelling agent is an effective way to con trol gas channeling and improve cementin g q uality.
Key words ni trogen s welling agent gas channeling ce menting quality high pressure oil and gas
HYDROGEN SULFIDE SHUTING OFF TECHNOLOGY IN WELL ZHAOX IN 2
by Pan Fengling,Liu Dongqin,et al(Drilling Tech.Research Inst.,Huabei Petroleum Administration Bureau)
Abstract As an exploration well located in the structure of Zhaolanzhuang,Well Zhaoxin 2was drilled to verify the oil and gas reserves and the resource of hydrogen sulfide.This well was com pleted in1979and oil was found oozing from the wellhead in2001. Based on the condition of high content of hydrogen sulfide and blockage of unknown matters at the wellhead,the following associ ate eq uipment such as rotary BOP,liquid/gas separator,vacuum degasser,and special tripping equipment free of killing job were used during the shutting off operation.Meanwhile,such techniq ues as closi ng the wellhead annular and pressured tripping were carried out,and the hydrogen sulfide shutting off operation in well Zhaox in 2was performed safely and successfully.
Key words Well Zhaoxin 2 shutoff hydrogen sulfide operation
EXPERIMENTAL RESEARCH ON THE PLATE MODELS FOR IM PROVING OIL RECOVERY OF RESTORED WA TER FLOOD ING AFTER POLYMER FLOOD ING by Xu Ting,Li Xiusheng(Uni versity of Petroleum,Beiji ng),et al
Abstracts Two different treatments for i mproving oil recov ery after polymer flooding have been studied with the laboratory p hysical modeling.Moreover effects of models with different perme abili ty contrasts have been considered on the technology of polymer reutilization.Then recognition of the polymer reutilizati on and ef fects has been acquired after polymer flooding.Research shows that in the treatment of polymer flooding water flooding in dep th p rofile control active water flooding,severe fingering will be produced for water mobility higher than that of polymer solution when water flooding has been restored after polymer flooding,then the s weep efficiency of water flooding has been greatly decreased.At the same time,water bulk will dilute the in depth profile control agent to great extent,which erodes the s trength of the in depth profile con trol agent,making the worse effect of profile control.In the treat ment of polymer flooding water flooding flocculati ng and fi x in g p olymer in depth profile control active water flooding,the floccu lates in site polymer diluted by water flooding,which plug hi gh permeability zones with the floc unit.The following injected poly mer fixed agen t will penetrate into the secondary hi gh permeability zone,mi x with polymer solu tion of high concentration and produce cross li nking systems which are ex cellent in in depth profile control and oil displacement.It has been testified that in plate model ex peri ments of three different permeabili ty contrasts,the polymer flocculated and polymer fixed technology is of long valid period, high strength of the floc uni t and cross linking system,the low cost,high oil recovery and utilizi ng extent of ex i sting polymer in p orous media which makes good foundation for succeeding in depth p rofile control and active water flooding.
百度搜索“70edu”或“70教育网”即可找到本站免费阅读全部范文。收藏本站方便下次阅读，70教育网，提供经典行业范文小位移深造斜点定向井施工技术(3)在线全文阅读。
相关推荐：
