石油钻采工艺
石油鑽採工藝
석유찬채공예
OIL DRILLING & PRODUCTION TECHNOLOGY
2014年
6期
7-10
,共4页
U型井%水平井%连通%测距导向%剖面设计%不确定性
U型井%水平井%連通%測距導嚮%剖麵設計%不確定性
U형정%수평정%련통%측거도향%부면설계%불학정성
U-shapedwell%horizontalwell%connection%rangingsteering%proifledesign%uncertainty
为实现2口水平井的精确连通，引入了磁场测距导向工具，开展了U型水平井井身剖面设计方法研究。在对井眼轨迹不确定性分析过程中，引入了合成误差圆。通过对比合成误差圆直径与磁场测距导向工具测距范围的大小，得到2种磁场测距导向工具的使用时机。根据磁场测距导向工具的选择使用情况以及测量特点，设计了相应的井身剖面。额外延伸部分为剖面设计的关键所在，根据测距范围给出了其精确的计算公式。通过实例验证可以看出此剖面设计是合理的。U型水平井的井身剖面设计体现了钻井设计与控制一体化，对今后的深入研究和实践具有参考意义。
為實現2口水平井的精確連通，引入瞭磁場測距導嚮工具，開展瞭U型水平井井身剖麵設計方法研究。在對井眼軌跡不確定性分析過程中，引入瞭閤成誤差圓。通過對比閤成誤差圓直徑與磁場測距導嚮工具測距範圍的大小，得到2種磁場測距導嚮工具的使用時機。根據磁場測距導嚮工具的選擇使用情況以及測量特點，設計瞭相應的井身剖麵。額外延伸部分為剖麵設計的關鍵所在，根據測距範圍給齣瞭其精確的計算公式。通過實例驗證可以看齣此剖麵設計是閤理的。U型水平井的井身剖麵設計體現瞭鑽井設計與控製一體化，對今後的深入研究和實踐具有參攷意義。
위실현2구수평정적정학련통，인입료자장측거도향공구，개전료U형수평정정신부면설계방법연구。재대정안궤적불학정성분석과정중，인입료합성오차원。통과대비합성오차원직경여자장측거도향공구측거범위적대소，득도2충자장측거도향공구적사용시궤。근거자장측거도향공구적선택사용정황이급측량특점，설계료상응적정신부면。액외연신부분위부면설계적관건소재，근거측거범위급출료기정학적계산공식。통과실례험증가이간출차부면설계시합리적。U형수평정적정신부면설계체현료찬정설계여공제일체화，대금후적심입연구화실천구유삼고의의。
In order to realize accurate connection of two horizontal wells, a magnetic ifeld ranging steering tool was introduced, and research was conducted on the design of U-shaped horizontal wellbore proifle. While conducting uncertainty analysis of wellbore trajectory, a composite error circle was introduced. By comparing the diameter of the composite error circle with the ranging size of the magneticifeldrangingsteeringtool,thetimings for using two magnetic ranging steering tools were obtained. Based on the selection and use of the magnetic ranging steering tool and measuring characteristics, the relevant wellbore proifle was designed. The additionally extended part was the key part in proifle design, and its accurate calculation equation was given by the ranging size. Example veriifcation shows that this proifle design is reasonable. The U-shaped horizontal well proifle design relfects the integration of drilling design with control, providing reference signiifcance for further study and practice in the future.
