井眼轨迹设计

1、井眼轨迹设计引言11井轨道设计依据12设计原则13设计步骤24基础数据35井身剖面设计参数36参考文献10引言井眼轨道是指在一口井钻进之前人们预想的该井井眼轴线形状。井眼轨迹是指一口已钻成的井的实际井眼轴线形状。按照设计轨道的不同，井可以分为两大类：直井和定向井。对于直井来说，井眼轴线就是一条铅垂线，不需要进行专门的设计。定向井是指按照预先设计的井斜方位和井眼的轴线形状进行钻进的井，凡是设计目标偏离井口所在铅垂线的井都属于定向井。1井轨道设计依据（1）以地质设计给定的入靶点、终止点垂深及大地测量坐标为依据。（2）根据给定的井口坐标和靶点坐标，完成单井设计。2设计原则（1）轨道设计应根据油藏特性

2、及地质要求、区域地质资料和工程资料，结合造斜工具的造斜能力、井眼轨迹控制技术水平以及地面、地下条件，选择造斜率、靶前位移、造斜点深度，调整井段长度及位置，并应经过多次循环调整，优选上述参数。（2）在地层岩性及造斜工具的造斜能力都确定时，增斜段应选择单增斜轨道。在地层岩性及造斜工具的造斜能力都较稳定时，应选择靶前位移较小、造斜率较高和增斜段较少的轨道。反之，在确定造斜率、靶前位移和增斜段的数量时要留有充分的控制余地。（3）造斜点应选可钻性较好，无坍塌、无缩径的地层。 （4）调整井段的位置应放在最后一个增斜段之前。 （5）对确定的井眼轨道，应进行典型钻具组合的摩擦阻力和扭矩计算，并以此为根据进行钻

3、机选型和钻具强度校核。3设计步骤关键参数计算图1多靶三段式轨道给定、，需计算的关键参数为、。由图 可得 （3-1） 令： （3-2） （3-3） （3-4） 则得： （3-5）将 （3-6） （3-7）代入式（3-5）中并简化，可得： （3-8） （3-9）4基础数据表1单井井口和靶点坐标井名井口坐标靶点坐标ABXYXY垂深XY垂深YY11187530513294738187526663294267241818751596329329024505井身剖面设计参数根据设计，选定造斜率MD (m)CL (m)Inc (°)Azi (°)TVD (m)NS (m)EW (m)V.

4、Sec (m)Dogleg (°/30m)T.Face (°)Build (°/30m)1000000000021700170000170000000031796.7296.727.71318.911796.434.9-4.27-0.462.391318.912.39141798.191.477.71318.911797.895.05-4.4-0.4700052762.04963.8588.73222.42418-385-471605.142.789-96.632.52262762.0488.73222.42418-385-471605.1400074211.34

5、1449.2988.73222.42450-1455-14482052.74000表2 轨迹主要点数据表表3 设计轨道详细点数据表MD (m)Inc (°)Azi (°)TVD (m)N/S (m)E/W (m)V.Sec. (m)DLeg (°/30m)1000000002300030000036000600000490009000005120001200000615000150000071800018000008210002100000924000240000010270002700000113000030000001233000330000013360003

6、600000143900039000001542000420000016450004500000174800048000001851000510000019540005400000205700057000002160000600000022630006300000236600066000002469000690000025720007200000267500075000002778000780000028810008100000298400084000003087000870000031900009000000329300093000003396000960000034990009900000

7、351020001020000036105000105000003710800010800000381110001110000039114000114000004011700011700000411200001200000042123000123000004312600012600000441290001290000045132000132000004613500013500000471380001380000048141000141000004914400014400000501470001470000051150000150000005215300015300000531560001560

8、0000541590001590000055162000162000005616500016500000571680001680000058170000170000005917100.8318.9117100.05-0.0502.3916017403.19318.911739.980.84-0.73-0.082.3916117705.58318.911769.892.57-2.24-0.242.391621796.727.71318.911796.434.9-4.27-0.462.391631798.197.71318.911797.895.05-4.4-0.4706418007.69317.

9、671799.685.23-4.56-0.492.7896518307.93297.11829.417.65-7.750.052.7896618609.06279.731859.088.99-11.922.042.78967189010.8267.031888.649.25-17.065.482.78968192012.91258.1219188.41-23.1510.372.78969195015.24251.791947.096.49-30.1816.692.78970198017.7247.141975.863.48-38.1324.432.78971201020.25243.62004

10、.23-0.6-46.9833.562.78972204022.84240.842032.13-5.74-56.7244.082.78973207025.48238.612059.5-11.94-67.3155.952.78974210028.15236.782086.28-19.18-78.7469.142.78975213030.83235.242112.39-27.44-90.9883.632.78976216033.53233.932137.78-36.71-10499.382.78977219036.24232.792162.38-46.95-117.76116.352.789782

11、22038.97231.82186.15-58.15-132.24134.52.78979225041.7230.912209.01-70.28-147.4153.792.78980228044.43230.112230.93-83.3-163.2174.172.78981231047.17229.392251.84-97.2-179.62195.62.78982234049.92228.722271.7-111.94-196.59218.022.78983237052.67228.112290.46-127.47-214.1241.382.78984240055.42227.552308.0

12、8-143.78-232.1265.632.78985243058.17227.022324.5-160.81-250.54290.712.78986246060.93226.512339.71-178.52-269.37316.552.78987249063.68226.042353.65-196.88-288.57343.112.78988252066.44225.592366.29-215.84-308.07370.32.78989255069.2225.162377.62-235.35-327.84398.082.78990258071.97224.742387.59-255.38-3

13、47.83426.372.78991261074.73224.332396.19-275.86-367.98455.112.78992264077.49223.942403.39-296.76-388.26484.232.78993267080.25223.552409.18-318.03-408.61513.652.78994270083.02223.172413.54-339.6-428.99543.322.78995273085.78222.82416.47-361.44-449.34573.162.789962762.0488.73222.42418-385-471605.142.78

14、997279088.73222.42418.62-405.64-489.85633.06098282088.73222.42419.28-427.79-510.07663.03099285088.73222.42419.94-449.94-530.29692.990100288088.73222.42420.6-472.09-550.52722.960101291088.73222.42421.27-494.24-570.74752.920102294088.73222.42421.93-516.39-590.97782.890103297088.73222.42422.59-538.53-6

15、11.19812.850104300088.73222.42423.25-560.68-631.41842.820105303088.73222.42423.92-582.83-651.64872.780106306088.73222.42424.58-604.98-671.86902.750107309088.73222.42425.24-627.13-692.08932.710108312088.73222.42425.9-649.28-712.31962.680109315088.73222.42426.57-671.43-732.53992.640110318088.73222.424

16、27.23-693.58-752.751022.610111321088.73222.42427.89-715.72-772.981052.570112324088.73222.42428.55-737.87-793.21082.540113327088.73222.42429.22-760.02-813.431112.50114330088.73222.42429.88-782.17-833.651142.470115333088.73222.42430.54-804.32-853.871172.430116336088.73222.42431.2-826.47-874.11202.4011

17、7339088.73222.42431.87-848.62-894.321232.360118342088.73222.42432.53-870.76-914.541262.330119345088.73222.42433.19-892.91-934.771292.290120348088.73222.42433.85-915.06-954.991322.260121351088.73222.42434.51-937.21-975.211352.220122354088.73222.42435.18-959.36-995.441382.190123357088.73222.42435.84-9

18、81.51-1015.661412.150124360088.73222.42436.5-1003.66-1035.891442.120125363088.73222.42437.16-1025.81-1056.111472.080126366088.73222.42437.83-1047.95-1076.331502.050127369088.73222.42438.49-1070.1-1096.561532.010128372088.73222.42439.15-1092.25-1116.781561.980129375088.73222.42439.81-1114.4-11371591.940130378088.73222.42440.48-1136.55-1157.231621.910131381088.73222.42441.14-1158.7-1177.451651.870132384088.73222.42441.8-1180.85-1197.681681.840133387088.73222.42442.46-1203-1217.91711.80134390088.73222.42443.13-1225.14-1238.121741.770135393088.73222.42443.79-1247.29-1258.351771.730136396088.7322