旋转地质导向系统在薄层水平井中的应用

THE APPLICATION OF ROTARY GEOSTEERING SYSTEM TO HORIZONTAL WELLS IN THIN LAYERS

为解决大庆外同油田薄层水平井轨迹控制难度大、钻遇率较低的问题，在敖包塔油田南部首次应用了旋转地质导向系统。针对敖包塔油田南部井控程度低、构造预测精度低和储层薄的特点，通过采取精细构造解释、建立地质和岩电模型、优选钻具仪器组合、地层精细对比等技术措施，充分发挥了旋转地质导向系统的优越性。应用效果明显，油层钻遇率达100％，井眼轨迹的规则程度大大提高，钻井周期缩短，井下复杂情况减少，提高了工程质量。

In Daqing peripheral oilfields, it is difficult to control the track of horizontal wells in thin layers, and the drilling ratio is low. With the consideration of these problems, the rotary geosteering system is applied in the south part of Aobaota oilfield for the first time. Based on the characteristics of the horizontal wells in the south part of Aobaota oilfield, which are low well control, low structure predication accuracy and thin layer, and with the application of relevant technical measures, such as fine structure interpretation, geological rock-electro model, optimal selection of drilling tool and equipment combination and fine strata correlation, the advantages of the rotary geosteering system are fully taken. The application effect is obvious： the drilling ratio of oil reservoirs has reached 100%, the regularity degree of the well track is greatly improved, the drilling cycle is shortened, the downhole complexity is decreased and the engineering quality is improved.