本文關(guān)鍵詞： K~() 校正系數(shù) 校正公式 伽馬探測 回歸數(shù)據(jù)分析　出處：《石油鉆采工藝》2017年05期 　論文類型：期刊論文

【摘要】：隨鉆自然伽馬測井是現(xiàn)代地質(zhì)導向測井的主要技術(shù)手段,且受到諸多地層或者非地層因素的影響,其中K~(40)對伽馬探管的探測有著較大的干擾,需要進行環(huán)境系數(shù)校正。但是在伊朗南帕斯區(qū)塊等新開發(fā)區(qū)塊,LWD生產(chǎn)商無法提供準確的現(xiàn)場校正數(shù)據(jù)和圖表,導致現(xiàn)場人員無法準確完成伽馬值的校正工作。通過對伊朗南帕斯SPDC19-x、SPDC15-x、SPDC4-x、SPDC6-x四大區(qū)塊中?311 mm井眼的定向井施工中得到的大量實踐數(shù)據(jù)進行優(yōu)化擬合分析和matlab的數(shù)據(jù)統(tǒng)計,得出了新的校正方法和伽馬值的計算公式。在KCl鉆井液體系下,通過新的校正法得到的伽馬曲線與標準勘察地層伽馬值吻合度高達95%,且負值錯誤率低于1%,遠優(yōu)于傳統(tǒng)校正方式,并且在伊朗南帕斯其余區(qū)塊20余口井的現(xiàn)場校正施工中得到了廣泛的應(yīng)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.
【作者單位】： 渤海鉆探定向井公司;華北油田通信公司;
【分類號】：P631.817

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