Lithologic Reservoirs ›› 2010, Vol. 22 ›› Issue (4): 89-94.doi: 10.3969/j.issn.1673-8926.2010.04.016

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Logging evaluation method for marine source rocks in middle Tarim Basin

LEI Tao1， ZHOU Wen 1，2， YANG Yi1， DENG Hucheng 1，2， ZHANG Guanghui3， ZHAO Ankun1   

  1. 1. College of Energy Resources， Chengdu University of Technology， Chengdu 610059， China； 2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation， Chengdu University of Technology， Chengdu 610059， China； 3. College of Information Management， Chengdu University of Technology， Chengdu 610059， China
  • Online:2010-12-15 Published:2010-12-15

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Abstract:

The evaluation of source rocks by logging has the characteristics of low-cost, good vertical continuity and practicability. Based on physical characteristics of organic matter and theoretical model of source rocks, the conventional log response characteristics of Ordovician source rocks in middle TarimBasin are analyzed. The result shows that the organic matter abundance is closely related to the elastic parameters, uranium and thorium content ratio and ΔGR, and the crossplot between acoustic and resistivity and crossplot between density and resistivity are established to recognize source rocks quantitatively. In the aspect of organic matter abundance evaluation, ΔlogR method and BP network method are used to describe the vertical heterogeneity of source rocks, which provides a reliable basis for dividing source rocks effectively.

Key words: sequence stratigraphy, seismic facies, Bengal fan

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