北布扎奇油田超短半徑

1、stimulation test of sidetracking horizontal well with turning on super-short radius in NB field北布扎奇油田短半徑側(cè)鉆水平井增產(chǎn)試驗綱要1 水平井是上世紀80年代以后世界上快速發(fā)展的一項新型開發(fā)技術(shù).特別是老井開窗側(cè)鉆水平井技術(shù)的發(fā)展和短半徑水平井鉆井技術(shù)的成熟不但使水平井鉆井成本大大降低,并且更有利于淺井的機械采油作業(yè),可滿足淺層井的抽油泵的泵掛深度,因此,舊井開窗短半徑水平井技術(shù)目前已做為成熟技術(shù)在世界油氣田的開發(fā)中廣泛應(yīng)用于老油田的增產(chǎn)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.開展短半徑側(cè)鉆水平井試驗的目的1.Purpose of Super-short Radius Sidetrack HW Test側(cè)鉆水平井技術(shù)概述 Brief int

4、roduction of sidetrack HW technology21.開展短半徑側(cè)鉆水平井試驗的目的1.Purpose of Super-short Radius Sidetrack HW Test利用停產(chǎn)報廢井開采平面剩余油;to produce remaining oil in plain ?in wells shut in or abandoned.開采停產(chǎn)報廢井中的薄油層或低滲油層,提高開發(fā)效益. To develop thin layer or oil formation with low permeability of wells shut in or abandoned.

5、稠油油藏的開采 to produce in sticky reservoir.側(cè)鉆水平井技術(shù)概述 Brief introduction of sidetrack HW technology3advantage 1(優(yōu)點1:)井眼橫向穿過油層, 井眼在油層中具有很大的裸露面積,油井生產(chǎn)時的生產(chǎn)壓差小,壓力涉及面大,產(chǎn)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.垂直井泄油面積drainage area in vertical well水平井泄油面積drainage area in HW1.開展短半徑側(cè)鉆水平井試驗的目的1.Purpose of Super-short Radius Sidetrack HW Test側(cè)鉆水平井技術(shù)概述 Brief introduction of sidetrack HW technology4Advantage(優(yōu)點): 2對底水油藏有較高的臨界采油速度,有利于底水油藏的高速開采 For reservoir with bottom water, it

7、 has a higher critical oil recovery rate , which is good for producing at high speed .垂直井水錐形式water coning in vertical well水平井水錐形式water coning in HW1.開展短半徑側(cè)鉆水平井試驗的目的1.Purpose of Super-short Radius Sidetrack HW Test側(cè)鉆水平井技術(shù)概述 Brief introduction of sidetrack HW technology5Advantage(優(yōu)點):3尤其是對薄層油層，可大大提高油井

8、產(chǎn)量。Especially for thinner layer, production rate can be greatly increased.1.開展短半徑側(cè)鉆水平井試驗的目的1.Purpose of Super-short Radius Sidetrack HW Test側(cè)鉆水平井技術(shù)概述 Brief introduction of sidetrack HW technology6利用超短半徑水平井技術(shù)挖掘目前低產(chǎn)井的生產(chǎn)潛力 To tap potential of dog wells with super-short R HW.自2003年以來,油田有近19口井處于長期低產(chǎn)或停產(chǎn)狀態(tài)

9、,占油田生產(chǎn)總井數(shù)的47%.用各種方式挖掘這些低產(chǎn)井的潛力對油田開發(fā)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.開展短半徑側(cè)鉆水平井試驗的目的1.Purpose of S

10、uper-short Radius Sidetrack HW Test在北布扎奇油田開展短半徑側(cè)鉆水平井試驗的目的The reason of Super-short Radius Sidetrack HW in NB7為北布扎奇油田薄油層和底水油層的開采尋找高效的開采方法To find an efficiency producing method for thinner oil layer and oil formation with bottom water.白堊系油藏的油層主要以薄層和薄層底水稠油油藏為主,有32%的儲量用現(xiàn)有技術(shù)開發(fā)效率不高和難以開發(fā). 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小層subzone厚度thickness（m）地層特征strata40.925.646.71.開展短半徑側(cè)鉆水平井試驗的目的1.Purpose of Super-short Radius Sidetrack HW Test在北布扎奇油田開展短半徑側(cè)鉆水平井試驗的目的The reason of Super-short Radius Sidetrack HW in NB8為北布扎奇油田薄油層和底水油層的開采尋找高效的開采方法To find an efficiency pr

13、oducing method for thinner oil layer and oil formation with bottom water.侏羅系的主力油層多數(shù)存在邊/底水,常規(guī)直井技術(shù)開發(fā),邊/底水錐井快,油井很快水淹,開發(fā)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在北布扎奇油田開展短半徑側(cè)鉆水平井試驗的目的The reason of Super-short Radius Sidetrack HW in NB1.開展短半徑側(cè)鉆水平井試驗的目的1.Purpose of Super-short Radius Sidetrack HW Test9以住北布扎奇油田水平井試驗的效果評估 evaluation of previous HW test of NB field99年6月到7月,北布扎奇油田先后在&斷塊的侏羅系油藏各鉆了一口水平井(NB3&NB4)in June 7, 1999,

15、 NB3&NB4 HW, in block &, were drilled in J of NB field successively Conductor 導(dǎo)管15m133/8Surface casing 表層套管170m95/8；Intermediate Casing 技術(shù)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切割縫繞絲篩管礫石充填完井slotted wire wrapped screen and gravel completion打孔管礫石充填完井s

16、creen and gravel completion1.開展短半徑側(cè)鉆水平井試驗的目的1.Purpose of Super-short Radius Sidetrack HW Test10以住北布扎奇油田水平井試驗的效果評估 evaluation of previous HW test of NB field1.開展短半徑側(cè)鉆水平井試驗的目的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試驗的效果評估 evaluation of previous HW test of NB field1.開展短半徑側(cè)鉆水平井試驗的目的1.Purpose of Super-short Radius Sidetrack HW Test12以住北布扎奇油田水平井試驗的效果評估 evaluation of previous HW test of NB field1.開展短半徑側(cè)

18、鉆水平井試驗的目的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試驗的效果評估 evaluation of previous HW test of NB field1.開展短半徑側(cè)鉆水平井試驗的目的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試驗的效果評估 evaluation of previous HW test of NB field1.開展短半徑側(cè)鉆水平井試驗的目的1.Purpose of Super-short Radius Sidetrack HW Test15以住北布扎奇油田水平井試驗的效果評估 evaluation of previous HW test of N

20、B field1.開展短半徑側(cè)鉆水平井試驗的目的1.Purpose of Super-short Radius Sidetrack HW Test16NB3井產(chǎn)量不高最可能的原因是繞絲篩管過細,造成管外油泥污染堵塞,使其產(chǎn)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試驗的效果評估 evaluation of previous HW test of NB field1.開展短半徑側(cè)鉆水平井試驗的目的1.Purpose of Super-short Radius Sidetrack HW Test17NB4井含水上升過快的原因是水平段末端距油水界面過近,底水上竄造成的. 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試驗的效果評估 evaluation of previous HW test of NB field1.開展短半徑側(cè)鉆水平井試驗的目的1.Purpose of Super-short Radi

23、us Sidetrack HW Test18結(jié)論:雖然NB3、NB4水平井的生產(chǎn)效果不是最佳，但其生產(chǎn)結(jié)果已經(jīng)反映出了水平井在北布扎奇油田的開發(fā)比垂直井有較大的優(yōu)勢。通過精心優(yōu)化水平井段的地質(zhì)設(shè)計，精心控制水平井段的軌跡，選擇適用于油藏特點的完井方式，水平井技術(shù)必將能大大提高北布扎奇油田的開發(fā)效果。因此，在總結(jié)以往水平井試驗經(jīng)驗的基礎(chǔ)上，利用老井側(cè)鉆技術(shù)再次進行水平井試驗是非常必要的。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試驗的效果評估 evaluation of previous HW test of NB field1.開展短半徑側(cè)鉆水平井試驗的目的1.Purpose of Super-short Radius Sidetrack HW Test192.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts about short

26、-radius side track HW testtest principle(試驗原則)：充分利用老井開窗側(cè)鉆水平井技術(shù)，利用油田已經(jīng)停產(chǎn)或低產(chǎn)無效益的井進行水平井技術(shù)試驗，一方面大大節(jié)省試驗費用，一方面使停產(chǎn)或低產(chǎn)無效益井發(fā)揮效益。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.根據(jù)油藏特點和應(yīng)用水平井技術(shù)最終要實現(xiàn)的開發(fā)目的，采用先易用后

27、難的原則進行側(cè)鉆水平井增產(chǎn)試驗：先在侏羅系油藏有邊底水的部位試驗邊、底水油藏水平井的開發(fā)效果，取得成功經(jīng)驗后再開展薄油層水平井增產(chǎn)試驗。Test in reservoir with edge/bottom water of J first, and then at thinner oil formation.為在投資最少的情況下，盡快取得試驗效果，鉆井工藝各環(huán)節(jié)盡量采用成熟的技術(shù)。Adopt mature technology during drilling and completion.20根據(jù)試驗原則，初步選擇NB30、NB31兩口高含水井做為首批側(cè)鉆水平井試驗井： based on te

28、sting principle, NB30 and NB31 conduct side track first.2.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts about short-radius side track HW test試驗初步設(shè)計（preliminary design of test）1、首批側(cè)鉆井位的選擇（first round well location selection）：21Jurassic Current Perforations2.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts about sho

29、rt-radius side track HW test試驗初步設(shè)計（preliminary design of test）1、首批側(cè)鉆井位的選擇（first round well location selection）：22Jurassic Current Perforations2.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts about short-radius side track HW test試驗初步設(shè)計（preliminary design of test）1、首批側(cè)鉆井位的選擇（first round well location selecti

30、on）：232.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts about short-radius side track HW test試驗初步設(shè)計（preliminary design of test）1、首批側(cè)鉆井位的選擇（first round well location selection）：242.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts about short-radius side track HW test試驗初步設(shè)計（preliminary design of test）1、首批側(cè)鉆井位的選擇（first

31、 round well location selection）：25Section 1Section 2Section 32.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts about short-radius side track HW test試驗初步設(shè)計（preliminary design of test）1、首批側(cè)鉆井位的選擇（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試驗初步設(shè)計（preliminary design of test）1、首批側(cè)鉆井位的選擇（first round well location selection）：2.開展短半徑側(cè)鉆水平井試驗的主要思路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.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts about short-radius side track HW test試驗初步設(shè)計（preliminary design of test）2、地質(zhì)靶區(qū)方案1示意圖（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.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts about short-radius side track HW test試驗初步設(shè)計（preliminary design of test）2、地質(zhì)靶區(qū)方案2示意圖（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試驗初步設(shè)計（preliminary design of test）2、地質(zhì)靶區(qū)方案3示意圖（geological target area）：2.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts about short-radius side track H

36、W test30鉆井方式：老井開窗側(cè)鉆水平段方式鉆井drilling way: slotted side track HW in old well2.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts about short-radius side track HW test試驗初步設(shè)計（preliminary design of test）3、鉆井工藝方案（drill program）：31完井方式：方案1：采用114.3mm割縫篩管半程固井完井方式half cementing and slotted screen2.開展短半徑側(cè)鉆水平井試驗的主要思路main t

37、rain of thoughts about short-radius side track HW test試驗初步設(shè)計（preliminary design of test）3、鉆井工藝方案（drill program）：32完井方式：方案2：采用127mm割縫篩管完井方式 slotted screen completion2.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts about short-radius side track HW test試驗初步設(shè)計（preliminary design of test）3、鉆井工藝方案（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.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts about short-radius side track HW test試驗初步設(shè)計（preliminary design of test）3、鉆井工藝方案（drill program）：34試驗初步設(shè)計（preliminary design of test）3、鉆井工藝方案（drill program）：完井方式：方案4：采用114.3mm割縫篩管封隔器完井方式slotted

39、 screen and packer completion2.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts about short-radius side track HW test35試驗初步設(shè)計（preliminary design of test） 4、鉆井設(shè)備（ drilling equipment）：鉆機載荷既要能夠滿足鉆進、下套管作業(yè)要求，又要具備一定的處理復(fù)雜（阻、卡）的能力；drilling rig load meets the requirement of drilling and running casing and deal with b

40、lock.要滿足水平井鉆井對凈化裝置及循環(huán)系統(tǒng)要求；meet the requirement of slurry purification device and circulation system.固控系統(tǒng)要求配備振動篩、除砂器和除泥器等三級凈化裝置及循環(huán)系統(tǒng)，配備3個30m3鉆井液循環(huán)罐和1個沉砂罐，以便控制和維護鉆井液性能，并做好環(huán)境保護。Shale shaker, desander, desilter, 3 slurry circulating tank and 1 tank for sand settlement.鉆機的額定載荷要大于500KN。因此，要求采用鉆深能力為1000150

41、0m的輕型鉆機設(shè)備?？蛇x用XJ450車載鉆井（修井）兩用鉆機或根據(jù)當?shù)貙嶋H情況，選用俄羅斯生產(chǎn)的A-60/80修井機和A-50修井機。Drilling rig should be drill about 1500m. XJ450 rig or A-60/80 and A-50 work over rig.2.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts about short-radius side track HW test36試驗初步設(shè)計（preliminary design of test） 5、服務(wù)方式（. service method）：（1）全井技

42、術(shù)服務(wù)（turn key contract）采用全井承包方式，包括鉆井隊、套管開窗側(cè)鉆水平井技術(shù)服務(wù)、泥漿、固井完井等。Including drilling crew, slotting in casing, slurry, cementing and completion （2）套管開窗側(cè)鉆及造斜點以下井段的技術(shù)服務(wù)。milling in casing and technical services below kickoff point中國新疆鉆井研究院在短半徑水平井方面擁有完善成套的鉆井、完井技術(shù)，已在中國新疆克拉瑪依淺層稠油油田上鉆了大量的淺層短半徑側(cè)鉆水平井。擁有豐富的鉆井設(shè)計和施工經(jīng)

43、驗，建議一旦開始試驗，由中國新疆克拉瑪依油田鉆井工藝研究院承擔技術(shù)服務(wù)。Drilling and completion technology of Xinjiang drilling institue is competent for side track in NB.2.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts about short-radius side track HW test37試驗初步設(shè)計（preliminary design of test） 6、鉆井工期測算（time schedule of drilling）序號No.鉆頭尺寸bit s

44、ize（mm）施工作業(yè)項目 operating 計劃時間plan days（天）累計時間accumulative days（天）1149.2送入斜向器，陀螺定向trip in whipstock, gyroscope surveying0.50.5開窗和修復(fù)窗口Milling window and repair window1.01.52149.2增斜段鉆進、輔助drill angle building interval2.03.53149.2水平段鉆進(300m)、輔助 drill horizontal interval 3.06.5下篩管、下油管、裝采油樹run screen ,tubin

45、g, install x-tree2.59.02.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts about short-radius side track HW test38試驗初步設(shè)計（preliminary design of test） 7、工程報價（ project quote）：項目名稱item金額（萬美元）amount(10,000 US$)鉆井工程費用drilling cost鉆機費用rig2.5鉆頭費用、鉆具費用bit and drilling tool1.0泥漿費用slurry3.8開窗側(cè)鉆水平井工具及技術(shù)服務(wù)費用tool for milli

46、ng window side track and technical services9.0完井費用completion cost114.3mm半程固井完井half cementing127mm割縫篩管完井slotted screen completion固井射孔完井（不含射孔費用）perforating completion采用114.3mm割縫篩管封隔器完井方式 slotted screen and packer completion8.57.03.57.5總費用total24.823.318.523.82.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts a

47、bout short-radius side track HW test39試驗初步設(shè)計（preliminary design of test）： 8、水平井產(chǎn)能和經(jīng)濟效益估算（W production capability and economic benefit estimation）：2.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts about short-radius side track HW test按以下兩種假設(shè)條件保守估算了側(cè)鉆水平井的產(chǎn)量和效益: based on following 2 assumptions to predict prod

48、uction rate and benefit of side track well .1.側(cè)鉆后,水平井的產(chǎn)液量仍為目前油井產(chǎn)液水平,含水率下降至20%,年產(chǎn)油遞減率和含水上升率均為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.側(cè)鉆后,水平井的產(chǎn)液量比目前提高一倍,含水率下降至20%,年產(chǎn)

49、油遞減率和含水上升率均為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.原油銷售油價為23.35$/bbl,操作成本為8$/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試驗初步設(shè)計（preliminary design of test）： 8、水平井產(chǎn)能和經(jīng)濟效益估算（W production capability and economic benefit estimation）：2.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts about short-radius side track HW test按以下兩種假設(shè)條件保守估算了側(cè)鉆水平井的產(chǎn)量和效益: based on fo

51、llowing 2 assumptions to predict production rate and benefit of side track well .3.原油銷售油價為23.35$/bbl,操作成本為8$/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試驗初步設(shè)計（preliminary de

52、sign of test）： 8、水平井產(chǎn)能和經(jīng)濟效益估算（W production capability and economic benefit estimation）：2.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts about short-radius side track HW testProduction prediction42試驗初步設(shè)計（preliminary design of test）： 8、水平井產(chǎn)能和經(jīng)濟效益估算（W production capability and economic benefit estimation）：2.開展短半徑側(cè)鉆水平井試驗的主要思路main train of thoughts about short-radius side track HW testBenefit prediction43搞好短半徑側(cè)鉆水平井增產(chǎn)試驗的關(guān)鍵技術(shù)：key points of short-radius side tr