北布扎奇油田超短半径English.ppt

stimulation test of sidetracking horizontal well with turning on super-short radius in NB field北布扎奇油田短半径侧钻水平井增产试验纲要,水平井是上世纪80年代以后世界上快速发展的一项新型开发技术.特别是老井开窗侧钻水平井技术的发展和短半径水平井钻井技术的成熟不但使水平井钻井成本大大降低,并且更有利于浅井的机械采油作业,可满足浅层井的抽油泵的泵挂深度,因此,旧井开窗短半径水平井技术目前已做为成熟技术在世界油气田的开发中广泛应用于老油田的增产中。In 1980s,HW technologies as a new method developed very quickly in the world,especially sidetrack HW by slotting in old well and super-short radius HW which decreased drilling cost and also made for mechanical production of shallow well,that means in shallow well the traditional pump also can be used to pump oil though the well in very low fluid level.Now sidetrack HW by slotting in old well with short radius being an good way has already been applied widely in development of old well stimulation in oil and gas field of the world.,1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test,侧钻水平井技术概述 Brief introduction of sidetrack HW technology,1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test,利用停产报废井开采平面剩余油;to produce remaining oil in plain?in wells shut in or abandoned.开采停产报废井中的薄油层或低渗油层,提高开发效益.To develop thin layer or oil formation with low permeability of wells shut in or abandoned.稠油油藏的开采 to produce in sticky reservoir.,侧钻水平井技术概述 Brief introduction of sidetrack HW technology,advantage 1(优点1:)井眼横向穿过油层,井眼在油层中具有很大的裸露面积,油井生产时的生产压差小,压力涉及面大,产量高;bore hole drills through oil formation in parallel.With a big bare area.Producing pressure difference of Producer is small but exists in big area that get high production.,垂直井泄油面积drainage area in vertical well,水平井泄油面积drainage area in HW,1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test,侧钻水平井技术概述 Brief introduction of sidetrack HW technology,Advantage(优点):2对底水油藏有较高的临界采油速度,有利于底水油藏的高速开采 For reservoir with bottom water,it has a higher critical oil recovery rate,which is good for producing at high speed.,垂直井水锥形式water coning in vertical well,水平井水锥形式water coning in HW,1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test,侧钻水平井技术概述 Brief introduction of sidetrack HW technology,Advantage(优点):3尤其是对薄层油层，可大大提高油井产量。Especially for thinner layer,production rate can be greatly increased.,1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test,侧钻水平井技术概述 Brief introduction of sidetrack HW technology,利用超短半径水平井技术挖掘目前低产井的生产潜力 To tap potential of dog wells with super-short R HW.,自2003年以来,油田有近19口井处于长期低产或停产状态,占油田生产总井数的47%.用各种方式挖掘这些低产井的潜力对油田开发效益非常重要.Since 2003,there are about 19 wells in low production for long time or stopping production,accounting 47%of whole wells in the field.To tap potential of these dog wells with methods is critical for field development benefit.,1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test,在北布扎奇油田开展短半径侧钻水平井试验的目的The reason of Super-short Radius Sidetrack HW in NB,为北布扎奇油田薄油层和底水油层的开采寻找高效的开采方法To find an efficiency producing method for thinner oil layer and oil formation with bottom water.白垩系油藏的油层主要以薄层和薄层底水稠油油藏为主,有32%的储量用现有技术开发效率不高和难以开发.Pay zones of K mainly consist of thinner oil layer and sticky thinner oil formation with bottom water.32%of reserve cant be produced or produced hardly by present development technology.,1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test,在北布扎奇油田开展短半径侧钻水平井试验的目的The reason of Super-short Radius Sidetrack HW in NB,为北布扎奇油田薄油层和底水油层的开采寻找高效的开采方法To find an efficiency producing method for thinner oil layer and oil formation with bottom water.侏罗系的主力油层多数存在边/底水,常规直井技术开发,边/底水锥井快,油井很快水淹,开发效果差.The most of main pay zone of J has edge/bottom water.With traditional vertical well developing,edge/bottom water cones very quickly.Producer is water out fast.And get bad development effects.,射孔井段perfs,底水bottom water,在北布扎奇油田开展短半径侧钻水平井试验的目的The reason of Super-short Radius Sidetrack HW in NB,1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test,以住北布扎奇油田水平井试验的效果评估 evaluation of previous HW test of NB field,99年6月到7月,北布扎奇油田先后在&断块的侏罗系油藏各钻了一口水平井(NB3&NB4)in June 7,1999,NB3&NB4 HW,in block&,were drilled in J of NB field successively,Conductor 导管15m133/8Surface casing 表层套管170m95/8；Intermediate Casing 技术套管219mm下至800斜向井段；run intermediate casing of 219 mm to the point of hole angle of 80,NB3,NB4,切割缝绕丝筛管砾石充填完井slotted wire wrapped screen and gravel completion,打孔管砾石充填完井screen and gravel completion,1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test,以住北布扎奇油田水平井试验的效果评估 evaluation of previous HW test of NB field,1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test,以住北布扎奇油田水平井试验的效果评估 evaluation of previous HW test of NB field,1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test,以住北布扎奇油田水平井试验的效果评估 evaluation of previous HW test of NB field,1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test,NB-4Z Wellpath,Top J20 Surfaceabove OWC,OWC surface-525m tvdss,以住北布扎奇油田水平井试验的效果评估 evaluation of previous HW test of NB field,1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test,以住北布扎奇油田水平井试验的效果评估 evaluation of previous HW test of NB field,1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test,以住北布扎奇油田水平井试验的效果评估 evaluation of previous HW test of NB field,1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test,NB3井产量不高最可能的原因是绕丝筛管过细,造成管外油泥污染堵塞,使其产量大幅度下降.the most possible reason for low production rate of NB3 is over-slim of the wire wrapped screen,outside of which is blocked by oil and silt and then cause big production rate decline.,以住北布扎奇油田水平井试验的效果评估 evaluation of previous HW test of NB field,1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test,NB4井含水上升过快的原因是水平段末端距油水界面过近,底水上窜造成的.The reason of water cut increasing over-fast of NB4 is of bottom water crossing upward for too short distance between the end of horizontal interval and WOC.,以住北布扎奇油田水平井试验的效果评估 evaluation of previous HW test of NB field,1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test,结论:虽然NB3、NB4水平井的生产效果不是最佳，但其生产结果已经反映出了水平井在北布扎奇油田的开发比垂直井有较大的优势。通过精心优化水平井段的地质设计，精心控制水平井段的轨迹，选择适用于油藏特点的完井方式，水平井技术必将能大大提高北布扎奇油田的开发效果。因此，在总结以往水平井试验经验的基础上，利用老井侧钻技术再次进行水平井试验是非常必要的。Conclusion:Though the development effect of NB3 and NB4 was not the best one,as to NB field development,it shows that horizontal well has advantage over vertical well.With optimizing geological design of horizontal interval,controlling well track of horizontal interval and selecting completion method suitable for reservoir characteristic,HW technology could improve development effect of NB field greatly.So on the basis of previous HW experience,it is necessary for us to conduct HW test by side track of old well.,以住北布扎奇油田水平井试验的效果评估 evaluation of previous HW test of NB field,1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,test principle(试验原则)：,充分利用老井开窗侧钻水平井技术，利用油田已经停产或低产无效益的井进行水平井技术试验，一方面大大节省试验费用，一方面使停产或低产无效益井发挥效益。Make full use of slotted side track HW technology in old well shut in or low production rate,save test cost and re-active dog wells and well shut in.根据油藏特点和应用水平井技术最终要实现的开发目的，采用先易用后难的原则进行侧钻水平井增产试验：先在侏罗系油藏有边底水的部位试验边、底水油藏水平井的开发效果，取得成功经验后再开展薄油层水平井增产试验。Test in reservoir with edge/bottom water of J first,and then at thinner oil formation.为在投资最少的情况下，尽快取得试验效果，钻井工艺各环节尽量采用成熟的技术。Adopt mature technology during drilling and completion.,根据试验原则，初步选择NB30、NB31两口高含水井做为首批侧钻水平井试验井：based on testing principle,NB30 and NB31 conduct side track first.,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,试验初步设计（preliminary design of test）1、首批侧钻井位的选择（first round well location selection）：,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,试验初步设计（preliminary design of test）1、首批侧钻井位的选择（first round well location selection）：,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,试验初步设计（preliminary design of test）1、首批侧钻井位的选择（first round well location selection）：,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,试验初步设计（preliminary design of test）1、首批侧钻井位的选择（first round well location selection）：,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,试验初步设计（preliminary design of test）1、首批侧钻井位的选择（first round well location selection）：,Section 1,Section 2,Section 3,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,试验初步设计（preliminary design of test）1、首批侧钻井位的选择（first round well location selection）：,NB-10,NB-31,True scale depth cross section,NB-10 to NB-31(see next slide for detail/legend),Section 1,试验初步设计（preliminary design of test）1、首批侧钻井位的选择（first round well location selection）：,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,试验初步设计（preliminary design of test）2、地质靶区方案1示意图（geological target area）：,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,试验初步设计（preliminary design of test）2、地质靶区方案2示意图（geological target area）：,试验初步设计（preliminary design of test）2、地质靶区方案3示意图（geological target area）：,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,钻井方式：老井开窗侧钻水平段方式钻井drilling way:slotted side track HW in old well,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,试验初步设计（preliminary design of test）3、钻井工艺方案（drill program）：,完井方式：方案1：采用114.3mm割缝筛管半程固井完井方式half cementing and slotted screen,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,试验初步设计（preliminary design of test）3、钻井工艺方案（drill program）：,完井方式：方案2：采用127mm割缝筛管完井方式 slotted screen completion,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,试验初步设计（preliminary design of test）3、钻井工艺方案（drill program）：,完井方式：方案3：采用114.3mm固井射孔完井方式completion:cementing and perforating,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,试验初步设计（preliminary design of test）3、钻井工艺方案（drill program）：,试验初步设计（preliminary design of test）3、钻井工艺方案（drill program）：,完井方式：方案4：采用114.3mm割缝筛管封隔器完井方式slotted screen and packer completion,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,试验初步设计（preliminary design of test）4、钻井设备（drilling equipment）：,钻机载荷既要能够满足钻进、下套管作业要求，又要具备一定的处理复杂（阻、卡）的能力；drilling rig load meets the requirement of drilling and running casing and deal with block.要满足水平井钻井对净化装置及循环系统要求；meet the requirement of slurry purification device and circulation system.固控系统要求配备振动筛、除砂器和除泥器等三级净化装置及循环系统，配备3个30m3钻井液循环罐和1个沉砂罐，以便控制和维护钻井液性能，并做好环境保护。Shale shaker,desander,desilter,3 slurry circulating tank and 1 tank for sand settlement.钻机的额定载荷要大于500KN。因此，要求采用钻深能力为10001500m的轻型钻机设备。可选用XJ450车载钻井（修井）两用钻机或根据当地实际情况，选用俄罗斯生产的A-60/80修井机和A-50修井机。Drilling rig should be drill about 1500m.XJ450 rig or A-60/80 and A-50 work over rig.,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,试验初步设计（preliminary design of test）5、服务方式（.service method）：,（1）全井技术服务（turn key contract）采用全井承包方式，包括钻井队、套管开窗侧钻水平井技术服务、泥浆、固井完井等。Including drilling crew,slotting in casing,slurry,cementing and completion（2）套管开窗侧钻及造斜点以下井段的技术服务。milling in casing and technical services below kickoff point中国新疆钻井研究院在短半径水平井方面拥有完善成套的钻井、完井技术，已在中国新疆克拉玛依浅层稠油油田上钻了大量的浅层短半径侧钻水平井。拥有丰富的钻井设计和施工经验，建议一旦开始试验，由中国新疆克拉玛依油田钻井工艺研究院承担技术服务。Drilling and completion technology of Xinjiang drilling institue is competent for side track in NB.,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,试验初步设计（preliminary design of test）6、钻井工期测算（time schedule of drilling）,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,试验初步设计（preliminary design of test）7、工程报价（project quote）：,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,试验初步设计（preliminary design of test）：8、水平井产能和经济效益估算（W production capability and economic benefit estimation）：,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,按以下两种假设条件保守估算了侧钻水平井的产量和效益:based on following 2 assumptions to predict production rate and benefit of side track well.,1.侧钻后,水平井的产液量仍为目前油井产液水平,含水率下降至20%,年产油递减率和含水上升率均为5%;1.After side track,fluid production rate is same as present fluid production level,water cut decreasing to 20%,both yearly decline rate and water increasing rate are 5%.2.侧钻后,水平井的产液量比目前提高一倍,含水率下降至20%,年产油递减率和含水上升率均为5%;2.After side track,fluid production rate increasing one times of current one.Water cut decreasing to 20%,both yearly decline rate and water increasing rate are 5%.3.原油销售油价为23.35$/bbl,操作成本为8$/bbl.3.Oil sale price unit is 23.35$/bbl,operating cost is 8$/bbl.,Now:NB31:Ql=587bbl/d;Qo=84bbl/d;WaterCut=85.6%.NB30:Ql=934.1bbl/d;Qo=228.6bbl/d;WaterCut=75.5%.,试验初步设计（preliminary design of test）：8、水平井产能和经济效益估算（W production capability and economic benefit estimation）：,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,按以下两种假设条件保守估算了侧钻水平井的产量和效益:based on following 2 assumptions to predict production rate and benefit of side track well.,3.原油销售油价为23.35$/bbl,操作成本为8$/bbl.3.Oil sale price unit is 23.35$/bbl,operating cost is 8$/bbl.,Now:NB31:Ql=587bbl/d;Qo=84bbl/d;WaterCut=85.6%.NB30:Ql=934.1bbl/d;Qo=228.6bbl/d;WaterCut=75.5%.,试验初步设计（preliminary design of test）：8、水平井产能和经济效益估算（W production capability and economic benefit estimation）：,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,Production prediction,试验初步设计（preliminary design of test）：8、水平井产能和经济效益估算（W production capability and economic benefit estimation）：,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,Benefit prediction,搞好短半径侧钻水平井增产试验的关键技术：key points of short-radius side track HW test,1、必须要有明确的地质目的，根据地质目的精心做好地质设计，选择有利的靶区，确保有效增产。Clear geological objective,good design,and good target area are needed to simulate efficiently.2、钻井轨道施工控制技术，确保水平准确钻达地质目标；drill path control to ensure drill target precisely.3、钻井过程中井眼稳定技术，确保水平段钻井顺利施工。Bore hole stabilization to ensure horizontal interval drilling smoothly.4、侧钻水平井完井工艺技术，确保油井具有一定的先期防砂功能和能够满足采油作业选择性增产施工的功能；to choose completion which can prevent sand and meet requirement of stimulation.5、可靠的采油工艺技术，确保水平井能够顺利进行机械采油作业。Reliable production techniques to ensure mechanical producing of HW 6、FWD油层解释能力论证FWD oil formation interpretation capability.,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,试验计划：TEST PLAN,侧钻水平井试验方案经公司批准后：After approval of test design of side track HW：04年7月1日25日：From July 1,2004 to July 25,2004 由中国新疆油气科学院组织一侧钻水平井设计小组赴油田进行侧钻水平井地质、和工艺施工方案设计；a side track HW design group from Xinjiang oil and gas academy of sciences will arrive at field to make a geological and technique design of sidetrack HW.油田上立即安排修井机对NB30、NB31井进行产液剖面、地层压力和探砂面测试作业，为水平井设计提供依据和做好施工准备；Field will arrange to test fluid entry profile,formation pressure and tag sand to prepare basis of design and operating.完成钻机选择和动迁工作；select rig and realize mobilization完成施工工具的动迁和服务合同的签定。Finish operating tool mobilization and sign contract.,2.开展短半径侧钻水平井试验的主要思路main train of thoughts about short-radius side track HW test,04年8