水平井着陆过程中深度误差判别及随钻调整
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摘要
水平井开发技术在渤海油田不断成熟和应用,水平井实施过程中的随钻跟踪已经成为开发人员的重要工作。油田开发调整的各个阶段,受到不同钻井平台、钻井设备、测量系统及预测精度的影响,不同批次调整井的深度通常存在误差,给水平井着陆时的随钻工作造成诸多不利影响。通过对Q油田近几年实施的144口综合调整井深度误差进行分析,总结并形成了过路层油水界面读值法、等高程地层比对法和地震时深转换计算法3种深度误差判别及随钻调整方法;明确了以上3种方法分别适用于过路底水油藏、油田内部井间加密调整、油田边部或地层变化在大区域调整3种情况。上述方法及策略已在Q油田实施的35口调整井中成功应用,通过准确判断水平井着陆过程中的深度误差,及时调整靶点深度和井轨迹,水平井着陆成功率达到100%。
The horizontal well development technology is becoming mature and applied in Bohai Oilfield.The drilling and tracking of horizontal wells has become an important work for the developers.The stages of oilfield development and adjustment are affected by different drilling platforms,drilling equipment,measurement systems and prediction accuracy,there are usually errors in the depth of different batches of adjustment wells.The work while drilling during the landing of the horizontal well has more adverse effects.Based on the analysis of the depth error of 114 comprehensive adjustment wells in Q oilfield in recent years,three methods of depth error discrimination and adjustment while drilling were summarized and formed,such as the reading value method of oilwater interface in the crossing layer,the comparison method of equal elevation strata and the calculation method of seismic time-depth conversion.It is clear that the above 3 methods are suitable for 3 cases of the reservoir of crossing and bottom water,the inter-well infilled adjustment in the oilfield and the adjustment of the oilfield edge or the formation change in the large area.The above methods and strategies have been successfully applied to 35 adjustment wells implemented in Q oilfield.By accurately judging the depth error during the landing of horizontal wells and timely adjusting the depth of target point and well track,the success rate of horizontal well landing reaches 100%.
The horizontal well development technology is becoming mature and applied in Bohai Oilfield.The drilling and tracking of horizontal wells has become an important work for the developers.The stages of oilfield development and adjustment are affected by different drilling platforms,drilling equipment,measurement systems and prediction accuracy,there are usually errors in the depth of different batches of adjustment wells.The work while drilling during the landing of the horizontal well has more adverse effects.Based on the analysis of the depth error of 114 comprehensive adjustment wells in Q oilfield in recent years,three methods of depth error discrimination and adjustment while drilling were summarized and formed,such as the reading value method of oilwater interface in the crossing layer,the comparison method of equal elevation strata and the calculation method of seismic time-depth conversion.It is clear that the above 3 methods are suitable for 3 cases of the reservoir of crossing and bottom water,the inter-well infilled adjustment in the oilfield and the adjustment of the oilfield edge or the formation change in the large area.The above methods and strategies have been successfully applied to 35 adjustment wells implemented in Q oilfield.By accurately judging the depth error during the landing of horizontal wells and timely adjusting the depth of target point and well track,the success rate of horizontal well landing reaches 100%.
引文
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[13]刘建辉,夏同星,郭军,等.浅层气对下伏地层深度预测影响定量研究及在渤海B油田中的应用[J].物探与化探,2016,40(4):763-770.
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[15]谷志猛,吕丁友,李久,等.渤海海域S低幅度构造区“低速陷阱”的成因及对策[J].大庆石油地质与开发,2016,35(5):146-151.
[2]唐宁,熊祖根,王贵刚.定向随钻测量误差分析及应用[J].钻采工艺,2016,39(5):22-25.
[3]卿元华,李秀彬.钻具深度与测井深度误差的成因探讨[J].西部探矿工程,2015(3):17-20,36.
[4]马猛,殷凯,刘朋.渤海油田水平井非正常着陆补救措施研究[J].录井工程,2011,22(1):26-31.
[5]孟鹏,冯鑫,汪巍,等.低油柱底水稠油油藏水平井随钻着陆策略[J].录井工程,2015,26(2):38-41.
[6]蒲仁海,党晓红,张惠,等.钙质含量旋回在卡拉沙依组小层对比中的应用[J].地层学杂志,2005,29(3):264-269.
[7]杨宏伟,胡心红.测井曲线正演在河流相储层对比中的应用[J].石油天然气学报(江汉石油学院学报),2014,36(8):79-81.
[8]杨云,余逸凡,毛平,等.复杂地层精细地层对比方法——以尕斯N1-N21油藏为例[J].石油地质与工程,2010,24(4):22-25.
[9]刘文岭,王大星,萧希航,等.复杂油藏井震联合等时地层对比技术与应用——以大港王徐庄油田为例[J].石油物探,2016,55(4):540-549.
[10]李涪芳,黄建华.标志层的研究进展及其意义[J].石化技术,2016(5):165-166.
[11]胡涛,孙强,刘辉,等.应用测井曲线进行划分标志层及断层[J].中国煤炭地质,2010,22(增刊):97-99.
[12]张国栋,韩立国,周家雄,等.海上油气田开发钻井地层深度预测技术探讨[J].特种油气藏,2015,22(4):29-32.
[13]刘建辉,夏同星,郭军,等.浅层气对下伏地层深度预测影响定量研究及在渤海B油田中的应用[J].物探与化探,2016,40(4):763-770.
[14]陈林,邓勇,盖永浩,等.对井震标定中一个特殊情况的思考[J].物探化探计算技术,2014,36(1):87-91.
[15]谷志猛,吕丁友,李久,等.渤海海域S低幅度构造区“低速陷阱”的成因及对策[J].大庆石油地质与开发,2016,35(5):146-151.