基于多元线性回归的地层平均速度分析及应用——以渤海A油田为例

doi:10.12108/yxyqc.20210413

岩性油气藏 ›› 2021, Vol. 33 ›› Issue (4): 121–127.doi: 10.12108/yxyqc.20210413

基于多元线性回归的地层平均速度分析及应用——以渤海A油田为例

谷志猛, 明君, 刘传奇, 王腾

中海石油 (中国) 有限公司天津分公司渤海石油研究院, 天津 300452

收稿日期:2020-05-11 修回日期:2020-11-05 出版日期:2021-08-01 发布日期:2021-08-06
第一作者:谷志猛(1982-),男,硕士,高级工程师,主要从事构造解释与储层预测方面的研究工作。地址:(300452)天津市滨海新区海川路2121号海洋大厦B座。Email:lengyangu@163.com。
基金资助:
国家科技重大专项“近海隐蔽油气藏勘探技术”（编号：2011ZX05023）资助

Analysis and application of formation average velocity based on multiple linear regression: A case study from A oilfield in Bohai Sea

GU Zhimeng, MING Jun, LIU Chuanqi, WANG Teng

Bohai Oilfield Research Institute, Tianjin Branch, CNOOC, Tianjin 300452, China

Received:2020-05-11 Revised:2020-11-05 Online:2021-08-01 Published:2021-08-06

摘要/Abstract

摘要： 为了反映地下构造特征，通常采用地层平均速度进行时深转换，而影响地层平均速度的因素很多，要得到准确的速度值并不容易。在稳定的沉积条件下进行地层平均速度公式推导，通过分析影响地层平均速度的敏感因素，将其转化为包含流体信息的含气比、含油比和砂地比的多元线性拟合公式，利用已知钻井信息通过最小二乘法求解未知项，得到最终的地层平均速度表达式。数值模拟结果和在渤海A油田的应用实例表明，多元线性回归的平均速度公式的计算结果与真实值的相对误差低于0.5%，具有较高的预测精度。该方法对类似地质条件地区具有一定的借鉴意义。

关键词: 平均速度, 多元线性回归, 砂地比, 最小二乘法, 低幅度构造

Abstract: Formation average velocity is often used for time depth conversion to reflect the real characteristics of underground structures,however,there are many factors that affect formation average velocity and it is not easy to get the accurate velocity value. The formation average velocity formula was derived under stable deposition conditions,and it was transformed into a multiple linear fitting formula of gas-sand ratio,oil-sand ratio and sandstrata ratio by analyzing the sensitive factors affecting the formation average velocity of the study layer. The known drilling information was brought into the formula and the unknown term was solved by the least square method,then the final average velocity expression was obtained. The results of numerical simulation and application in A oilfield in Bohai Sea show that the calculated value of average velocity formula based on multiple linear regression has high prediction accuracy,the relative error between the calculated value and the real value is less than 0.5%. This method can be used for reference in areas with similar geological conditions.

Key words: average velocity, multivariate linear regression, sand-strata ratio, least-square method, low-amplitude structure

中图分类号:

P631.8

谷志猛, 明君, 刘传奇, 王腾. 基于多元线性回归的地层平均速度分析及应用——以渤海A油田为例[J]. 岩性油气藏, 2021, 33(4): 121–127.

GU Zhimeng, MING Jun, LIU Chuanqi, WANG Teng. Analysis and application of formation average velocity based on multiple linear regression: A case study from A oilfield in Bohai Sea[J]. Lithologic Reservoirs, 2021, 33(4): 121–127.

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基于多元线性回归的地层平均速度分析及应用——以渤海A油田为例

Analysis and application of formation average velocity based on multiple linear regression: A case study from A oilfield in Bohai Sea

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