低油柱底水稠油油藏水平井随钻着陆策略

Horizontal well landing strategy while drilling low oil column and bottom water heavy oil reservoirs

对于低油柱底水稠油油藏,避水高度是影响水平井见水时间和产能的最主要因素,准确着陆是水平井成功实施的关键。运用C油田高精度地震资料.根据沉积正韵律特征、隔夹层分布模式和沉积微相资料,结合钻井工具增斜能力.总结了一套适合低油柱底水油藏水平井随钻着陆策略.即;低油柱底水稠油油藏与高精度地震资料背景下的87°稳斜找油策略:沉积正韵律与低油柱双重约束下的1.5 m着陆深度策咯:隔夹层分布模式指导下的剖面着陆策略:沉积微相控制下曲平面着陆策略。该技术在指导调整井精确莆陆中取得了较好的应用效果.也为该油田今后的综台调整方案中水平井的实施提供了参考。

For low oil column and bottom water heavy oil reservoirs,the water avoidance height is the major factor of influencing water breakthrough time and production capacity in horizontal wells,accurately landing is the key to successful implementation for horizontal wells.Using C oilfield s high precision seismic data,according to the features of positive rhythm,distributing pattern of the interlayers,sedimentary microfacies,combined with the drilling tool s ability to build-up hole angle,the authors summed up a set of strategies suitable for horizontal well landing while drilling in low oil column and bottom water reservoirs,87° slope stability in conditions of low oil column and bottom water heavy oil reservoir and high precision seismic data,1.5 mlanding depth under the dual constraints of positive rhythm and low oil column,profile landing under the guidance of distributing pattern of the interlayers,and plane landing under the control of sedimentary microfacies.The technology has not only made good effects in guiding precise landing of adjustment wells,but also provided a reference for the implementation of horizontal wells in oil fields for the future comprehensive adjustment program.