北布扎奇油田超短半径

1、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1 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 a

2、s 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 th

3、e 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 int

4、roduction of sidetrack HW technology21.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.

5、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 technology3advantage 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

6、 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 HW1.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 technology4Advantage(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

7、 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 HW1.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 technology5Advantage(优点):3尤其是对薄层油层，可大大提高油井

8、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 technology6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

9、,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 S

10、uper-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 NB7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 ma

11、inly 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.Transgressive Lag Shallow Marine to Non-Marine Low Energy - “Wealdon” Type- Includes Seismically Definable ChannelsAs Neo B but l

12、ess “Sandy”Shallow Marine Sand BodiesNeo. ANeo. BNeo. CNeo. D5.2小层subzone厚度thickness（m）地层特征strata40.925.646.71.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 NB8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 pr

13、oducing 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 deve

14、lopment 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 NB1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test9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 field99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,

15、 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 NB3NB4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s

16、creen and gravel completion1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test10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 field1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test11Top J10BTop J20, Strat. floor to oilBase CretaceousDeeper horizons not shown

17、NB-3Z welltrackNB-3Y welltrackBlock 6 OWC-482mGOC -432mNB-3 J10CJ10BDecrease in SwIncrease in Porosity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 field1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test12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 field1.开展短半径侧

18、钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test13NB-4Z WellpathTop J20 Surfaceabove OWCOWC 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 field1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test14NB-4NB-2NB-4Z WellpathTop J20Top J10BTop J20BDecrea

19、se in SwIncrease in PorosityDecrease in SwIncrease in PorosityDepth Cross Section along NB4Z WellpathBlock 7 OWC-525m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 field1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test15以住北布扎奇油田水平井试验的效果评估 evaluation of previous HW test of N

20、B field1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test16NB3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 declin

21、e.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 field1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test17NB4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 hori

22、zontal interval and WOC .NB-4NB-2NB-4Z WellpathTop J20Top J10BTop J20BDecrease in SwIncrease in PorosityDecrease in SwIncrease in PorosityDepth Cross Section along NB4Z WellpathBlock 7 OWC-525m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 field1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radi

23、us Sidetrack HW Test18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,

24、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 gr

25、eatly. 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 field1.开展短半径侧钻水平井试验的目的1.Purpose of Super-short Radius Sidetrack HW Test192.开展短半径侧钻水平井试验的主要思路main train of thoughts about short

26、-radius side track HW testtest 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

27、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.20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 te

28、sting 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）：21Jurassic Current Perforations2.开展短半径侧钻水平井试验的主要思路main train of thoughts about sho

29、rt-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）：22Jurassic Current Perforations2.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 selecti

30、on）：232.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）：242.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

31、 round well location selection）：25Section 1Section 2Section 32.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）：26NB-10NB-31100 MetresTrue scale depth cross section, NB-10 to NB-31(see next

32、 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 test27NB-10NB-31Depth Cross Section through NB-10 and NB-31 Showing Hydrocarbon ContactsGOC -436mOWC -482mCl

33、aystone rich base to J10B (CVX Interpretation)Decrease in SwIncrease in PorosityTop J10CTop J20BTop J10BTop J20Section 12.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）：28Section 2200 MetresOWC -482m

34、GOC -436m tvdssTop J10CTop J10BTop J20NB-31Claystone rich base to J10B (CVX Interpretation)Decrease in SwIncrease in PorosityWestward2.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）：29Section 3200 Me

35、tresGOC -436m tvdssTop J10CTop J10BTop J20NB-31Decrease in SwIncrease in PorosityOWC -482mClaystone rich base to J10B (CVX Interpretation)West-southwestward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 H

36、W test30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 well2.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）：31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 screen2.开展短半径侧钻水平井试验的主要思路main t

37、rain 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）：32完井方式：方案2：采用127mm割缝筛管完井方式 slotted screen completion2.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）

38、：33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）：34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

39、 screen and packer completion2.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 test35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 b

40、lock.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1000150

41、0m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 test36试验初步设计（preliminary design of test） 5、服务方式（. service method）：（1）全井技

42、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

43、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 test37试验初步设计（preliminary design of test） 6、钻井工期测算（time schedule of drilling）序号No.钻头尺寸bit s

44、ize（mm）施工作业项目 operating 计划时间plan days（天）累计时间accumulative days（天）1149.2送入斜向器，陀螺定向trip in whipstock, gyroscope surveying0.50.5开窗和修复窗口Milling window and repair window1.01.52149.2增斜段钻进、辅助drill angle building interval2.03.53149.2水平段钻进(300m)、辅助 drill horizontal interval 3.06.5下筛管、下油管、装采油树run screen ,tubin

45、g, install x-tree2.59.02.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 test38试验初步设计（preliminary design of test） 7、工程报价（ project quote）：项目名称item金额（万美元）amount(10,000 US$)钻井工程费用drilling cost钻机费用rig2.5钻头费用、钻具费用bit and drilling tool1.0泥浆费用slurry3.8开窗侧钻水平井工具及技术服务费用tool for milli

46、ng window side track and technical services9.0完井费用completion cost114.3mm半程固井完井half cementing127mm割缝筛管完井slotted screen completion固井射孔完井（不含射孔费用）perforating completion采用114.3mm割缝筛管封隔器完井方式 slotted screen and packer completion8.57.03.57.5总费用total24.823.318.523.82.开展短半径侧钻水平井试验的主要思路main train of thoughts a

47、bout short-radius side track HW test39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 prod

48、uction 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

49、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

50、=84bbl/d;WaterCut=85.6%.NB30:Ql=934.1bbl/d; Qo=228.6bbl/d;WaterCut=75.5%.40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 fo

51、llowing 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%.41试验初步设计（preliminary de

52、sign 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 testProduction prediction42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 testBenefit prediction43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 tr