5月28日，河南油田在春光探区部署的水平井春垩5301H井顺利完钻，标志着薄层水平井勘探开发一体化迭代升级技术应用成功。

春垩5301H井油层厚度仅1.4米，水平段长303米，在没有定向导引的情况下，存在钻头出层、储层钻遇率难保障等风险。

在没有技术可借鉴的条件下，河南油田技术人员提前做好邻井的录井、测井情况分析，与钻、测、录技术人员全方位结合，精细对比现场测录井数据，精细标定层位，结合高精度储层预测及钻前油气检测结果，开展井轨迹定位分析，准确预测靶点位置和深度，把预测深度和实钻深度误差控制在0.5米以内，防止钻头出靶。在钻探过程中，河南油田技术人员24小时跟踪钻井情况，预测待钻油层的延伸趋势，及时提出井轨迹调整方案，有效保障了水平段顺利钻进，实现储层钻遇率100%。该井完钻后，测井解释油层11段221.6米，有效释放了薄层岩性油藏储量的潜力。

On May 28, the horizontal well Chunchalk 5301H deployed by Henan Oilfield in Chunguang exploration area was successfully drilled, marking the successful application of integrated iterative upgrading technology for exploration and development of thin layer horizontal Wells.

Chuncretaceous well 5301H is only 1.4 meters thick and 303 meters long. Without directional guidance, there are some risks such as drilling out of formation and difficult to guarantee the drilling rate of the reservoir.

In the absence of technology for reference, technical personnel of Henan oilfield made well logging and logging analysis of adjacent Wells in advance, combined with drilling, surveying and recording technicians in an all-round way, finely compared the field logging data, finely calibrated the horizon, combined with high-precision reservoir prediction and pre-drilling oil and gas detection results, carried out well trajectory positioning analysis, and accurately predicted the target location and depth. The error between the predicted depth and the actual drilling depth is controlled within 0.5 meters to prevent the drill bit from missing the target. During the drilling process, the technicians of Henan Oilfield tracked the drilling situation 24 hours a day, predicted the extension trend of the oil layer to be drilled, put forward the well trajectory adjustment plan in time, effectively guaranteed the smooth drilling of the horizontal section, and realized the drilling rate of the reservoir 100%. After the well was drilled, 221.6 m of the 11 member of the reservoir was interpreted, which effectively released the reserves potential of the thin-layer lithologic reservoir.