伊朗南帕斯区块伽马曲线校正方法

发布时间：2018-03-01 19:11

本文关键词： K~() 校正系数校正公式伽马探测回归数据分析　出处：《石油钻采工艺》2017年05期 　论文类型：期刊论文

【摘要】：随钻自然伽马测井是现代地质导向测井的主要技术手段,且受到诸多地层或者非地层因素的影响,其中K~(40)对伽马探管的探测有着较大的干扰,需要进行环境系数校正。但是在伊朗南帕斯区块等新开发区块,LWD生产商无法提供准确的现场校正数据和图表,导致现场人员无法准确完成伽马值的校正工作。通过对伊朗南帕斯SPDC19-x、SPDC15-x、SPDC4-x、SPDC6-x四大区块中?311 mm井眼的定向井施工中得到的大量实践数据进行优化拟合分析和matlab的数据统计,得出了新的校正方法和伽马值的计算公式。在KCl钻井液体系下,通过新的校正法得到的伽马曲线与标准勘察地层伽马值吻合度高达95%,且负值错误率低于1%,远优于传统校正方式,并且在伊朗南帕斯其余区块20余口井的现场校正施工中得到了广泛的应用。
[Abstract]:Natural gamma logging while drilling is the main technical means of modern geological guidance logging, and is influenced by many stratigraphic or non-stratigraphic factors. Environmental coefficient correction is needed. But LWD producers in new development blocks such as the South Paz block in Iran are unable to provide accurate on-site correction data and charts. The correction of gamma values cannot be accurately completed by field personnel. In the four major blocks of SPDC6-x through SPDC19-xN SPDC15-xG SPDC4-x in South Paz, Iran? A large number of practical data obtained in the directional well construction of 311mm borehole are optimized and analyzed and matlab data statistics are obtained. A new correction method and a formula for calculating gamma value are obtained. Under the KCl drilling fluid system, a new correction method and a formula for calculating gamma value are obtained. The gamma curve obtained by the new correction method coincides with the gamma value of the standard survey strata as high as 95, and the error rate of the negative value is less than 1, which is far better than the traditional correction method. And it has been widely used in the field correction of more than 20 wells in the remaining blocks of South Paz, Iran.
【作者单位】：渤海钻探定向井公司;华北油田通信公司;
【分类号】：P631.817

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