海上油气田开发钻井地层深度预测技术探讨

Discussion on Formation Depth Prediction Technology for Offshore Oil/Gas Field Development

以南海西部3个油气田的开发钻井为例,对海上油气田开发钻井过程中由于异常体干扰、断层遮挡、地层缺失3种影响因素引起的地层深度预测误差问题进行了研究,提出利用实钻井速度实时预测地层深度的解决思路,实现了海上油气田开发钻井随钻地层的高精度深度预测。南海西部油气田大量开发钻井结果表明,利用该技术进行油气田开发阶段的地层深度预测,相对深度预测误差基本控制在1%以内,大大降低了油气田开发的风险,减少了钻井费用。

Taking well drilling in three oil / gas fields in the western South China Sea as example,research is made on errors of formation depth prediction due to anomalous body interference,fault barrier and formation missing in the process of offshore petroleum development. The solutions by using drilling speed to predict formation depth in real time are put forward and achieve high- precision and large- depth prediction for offshore petroleum development. A great number of development and drilling results in the western South China Sea show that the technology for oil / gas field development can ensure that the prediction error of relative depth is kept within 1%,thereby greatly reducing the risks of oil / gas field development and drilling costs.