技术方法

烃源岩有机质丰度的测井计算方法及影响因素探讨

  • 张本健 ,
  • 裴森奇 ,
  • 尹宏 ,
  • 杨毅
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  • 1. 中国石油大学(北京)油气资源与探测国家重点实验室; 2. 中国石油大学(北京)地球科学学院
曲彦胜,1986 年生,男,中国石油大学(北京)在读硕士研究生,研究方向为油藏地球化学。地址:(102249)北京市昌平区中国 石油大学(北京)新科研楼925 室。电话:(010)89734549。E-mail:quyansheng@163.com

网络出版日期: 2011-04-20

Using logging methods to calculate organic matter abundance of source rocks and its influencing factors

  • ZHANG Benjian ,
  • PEI Senqi ,
  • YIN Hong ,
  • YANG Yi
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  • 1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China; 2. College of Geosciences, China University of Petroleum, Beijing 102249, China

Online published: 2011-04-20

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摘要

近年来,结合丰富的地球物理信息和地球化学实验数据来研究烃源岩,可有效克服常规岩样分析资料连续性差、成本高的难题,且获得了广泛的应用,但在实际应用过程中发现,其准确性并非很高。文中以辽河西部凹陷为例,结合取心井SG1 的烃源岩地球化学和测井资料,重点对比了不同成熟度范围的烃源岩的测井响应差异。通过讨论影响烃源岩TOC 测井计算方法准确性的各种因素,对比了最小二乘法与Δlg R 方法的优缺点,认为最小二乘法拟合公式的3 个常数(A,B,C)包含了多种影响计算结果的因素,因此,最小二乘法更能反映烃源岩层TOC 的变化,且在应用时具有较强的可操作性。

本文引用格式

张本健 , 裴森奇 , 尹宏 , 杨毅 . 烃源岩有机质丰度的测井计算方法及影响因素探讨[J]. 岩性油气藏, 2011 , 23(2) : 80 -84 . DOI: 10.3969/j.issn.1673-8926.2011.02.015

Abstract

In recent years, combining abundant geophysical information with geochemical experimental data to study source rocks can effectively overcome the weakness of poor continuity and high costs in conventional formation sample analysis, so it is widely applied. However, it is not found with high accuracy in the practical application. TakingWestern Sag in Liaohe Basin as an example, based on the geochemical and well logging data of source rocks in SG1 well, the log responses of source rocks with different maturity are contrasted. The factors influencing the accuracy of TOC calculation are discussed, and the least square method and ΔlgR method are compared. The result shows that the three constant in least square fitting formula contain various factors which can influence the calculation result. Therefore, the least square method could reflect the TOC changes in source rocks better and it is easy to be applied.

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