CAJ | 학술논문

樊试U1井组是渤海钻探在山西沁水地区承接的第1口U型水平连通井，其设计水平位移近千米，远远超过该地区之前施工的连通井。煤层气开发实践证明U型井可有效地导通煤储层的裂隙系统，增加气、水导流能力，相比直井和普通定向井大幅度提高了单井产量和采收率，而相比较于多分支水平井又大幅减少了投入成本，是开发煤层气资源的优选手段。介绍了U型井设计施工方案及?50.8 mmPVC筛管完井工艺。通过分析该地区15号煤储层地质特点，介绍了通过“二维”地震图计算着陆点处15号煤层垂深的方法。通过建立仪器系统误差累积数学模型，提出磁偏角校正系数，成功完成了远端一次性连通。
번시U1정조시발해찬탐재산서심수지구승접적제1구U형수평련통정，기설계수평위이근천미，원원초과해지구지전시공적련통정。매층기개발실천증명U형정가유효지도통매저층적렬극계통，증가기、수도류능력，상비직정화보통정향정대폭도제고료단정산량화채수솔，이상비교우다분지수평정우대폭감소료투입성본，시개발매층기자원적우선수단。개소료U형정설계시공방안급?50.8 mmPVC사관완정공예。통과분석해지구15호매저층지질특점，개소료통과“이유”지진도계산착륙점처15호매층수심적방법。통과건립의기계통오차루적수학모형，제출자편각교정계수，성공완성료원단일차성련통。
The Fan U1 test well group was the ifrst U-shaped horizontally connected well drilled by Bohai Drilling Engineering Company Limited in Qinshui, Shanxi Province. Its designed horizontal displacement is nearly 1 000 m, much longer than the connected wells drilled previously. Coalbed methane development practices show that the U-shaped connected well can effectively connect the ifssure system in the coal reservoir, increase the gas and water conductivity. Compared with vertical wells and ordinary directional wells, the U-shaped wells have greatly increased the single-well production and recovery rate, compared with multi-branch horizontal wells, the investment is greatly reduced. So this U-shaped well is a top option in the development of coalbed methane. This paper introduces the design and drilling philosophy of U-shaped well and the completion technology with ?50.8 mm PVC screen pipe. By analyzing the geological characteristics of #15 Coal Reservoir, this paper presents a method to calculate the vertical depth of landing point in #15 Coal Reservoir through 2D seismic graph. By building a mathematical model for error accumulation of instrument system, the magnetic declination correction coefifcient is presented in this paper, and far-end connection was realized successfully at one time.