焦石坝超长水平井测井资料处理方法

在页岩气的开发中，为了获得更高产能，超长水平井的应用成为必然。超长水平井的垂深计算受地层倾角影响较大，计算垂深时必须考虑地层倾角的影响。当井斜大于90°时，常规垂深计算方法会出现数据丢失现象，对地层对比造成困扰。通过建立校正模型，根据地层倾角分别对井斜及大于90°的井斜进行校正，再根据校正后的数据计算垂深，可较好的消除地层倾角的影响及当井斜大于90°时的数据丢失现象，保证了水平井眼轨迹计算分析的正确性，也为后期压裂改造提供支持。

Research on Logging Information Processing of Overlong Horizontal Wells in Jiaoshiba

With ever--increasing development of shale gas, overlong horizomal wells are widely used for better capaci- ty. In computing their vertical depth, it is essential to take into account the dip angle which is likely to impact the computing. When well deviation is greater than 90 degree, conventional computing method of vertical depth is likely to cau the loss of data, thus troubling stratigraphic correlation. Through building calibration model, the correc- tions of well deviation and the angle greater than 90 degree are carried out respectively according to dip angle before vertical depth is computed so that dip angle has little impact on the computation and the computed data can be stored well even if the angle is greater than 90 degree. As a result, all this can ensure the accuracy of computing and analy- zing the well track of horizontal well and provide geologically support for late fracturing.