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The Method and Application of Using Generalized‐ΔLgR Technology to Predict the Organic Carbon Content of Continental Deep Source Rocks
Author(s) -
HU Huiting,
LIU Chao,
LU Shuangfang
Publication year - 2015
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.12306_14
Subject(s) - content (measure theory) , carbon fibers , total organic carbon , geology , source rock , mineralogy , geochemistry , environmental science , computer science , algorithm , mathematics , geomorphology , chemistry , environmental chemistry , mathematical analysis , composite number , structural basin
△LgR technology was widely used in source rocks (TOC) well logging evaluation as well as the most reliable way in the industry. This technology applies electrical resistivity and interval transit time curve to cauculat TOC.According to the continuous TOC content calculated form logging curvies, thickness of source rocks with different abundance levels can be distinguished, therefore,it also provides an effective methods for the study of hydrocarbon contribute of different organic abundance levels. △LgR technology can give a reliable TOC.predicting results for normally compacted source rocks in middleshallow layers,the relative error is generally less than 20%.However, the error is much larger for the deeply buried continental source rocks.Because the strong compaction and highly electric conductive component making the responses of resistivity and porosity curves so weak that the interval transit time curve and resistivity logging curve can not well reflect the TOC changing with sedimentary environment .At present,we still have no corresponding interpretation model for TOC prediction of deeply buried continental source rocks. The purpose of the text is to establish the generalized △LgR technology through modificating of traditional △LgR technology,by taking Shahezi formation in Xujiaweizi fault depression as an example, generalized △LgR technology was applied.