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Hydrocarbon source rock total organic carbon content prediction method considering density factor

A technology of total organic carbon content and prediction method, which is applied in the direction of prediction, earthwork drilling and production, wellbore/well components, etc. It can solve problems such as unsatisfactory effect, low background value, deep buried source rock, etc., and achieve prediction Good results and the effect of expanding the scope of use

Active Publication Date: 2019-11-12
NORTHWEST UNIV(CN)
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Problems solved by technology

[0010] For continental source rock formations, due to the low background value of TOC and the deep buried depth of source rocks, the application effect of the traditional ΔlogR method is not very ideal

Method used

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  • Hydrocarbon source rock total organic carbon content prediction method considering density factor
  • Hydrocarbon source rock total organic carbon content prediction method considering density factor
  • Hydrocarbon source rock total organic carbon content prediction method considering density factor

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Embodiment 1

[0072] Such as figure 1 As shown, the present invention relates to a generalized ΔlogR method considering the density factor to predict the total organic carbon TOC of source rocks, and the specific steps are as follows:

[0073] The traditional ΔlogR method is proposed based on marine and normally compacted strata. When this method is applied to continental strata, there will be large errors because the conductive components of continental sedimentary strata are relatively high, which makes the resistivity curves not There is no obvious abnormality; and when the burial depth of the source rock is large, the strong compaction makes the acoustic time difference small. At this time, the amplitude difference ΔlogR after the reverse superimposition of the acoustic time difference curve and the resistivity curve is not obvious . Therefore consider using GR curves instead of maturity parameters.

[0074] Since the density of solid organic matter (kerogen) is about 1.0g / cm 3 -1.4g...

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Abstract

The invention discloses a hydrocarbon source rock total organic carbon content prediction method considering a density factor. The method comprises the following steps: drawing the organic carbon content of a rock core of each well and a logging curve of the corresponding well on the same graph through software; segmenting the hydrocarbon source rock according to the maturity or age stratigraphictable of the hydrocarbon source rock; manually picking up the baseline value of the RD and the baseline value of the DT of each section; and according to the baseline value of the RD of each section,the baseline value of the DT of each section, the RD logging curve value corresponding to each depth and the DT logging curve value corresponding to each depth, solving the amplitude difference deltalogR of reverse superposition of the DT curve corresponding to the measurement point of the rock core of the multiple wells and the RD curve, and then predicting the total organic carbon content of the hydrocarbon source rock. According to the method, the tedious process that a traditional delta logR method needs to correspond to a maturity parameter chart is avoided, the influence of the compaction effect on the hydrocarbon source rock is considered, the application range of the traditional method is expanded, and the method has a good effect on the continental facies deep hydrocarbon sourcerock in China.

Description

technical field [0001] The invention belongs to the field of oil and gas exploration and development, and in particular relates to a method for predicting the total organic carbon content of source rocks considering the density factor. Background technique [0002] TOC prediction is an important part of the source rock evaluation process. Although traditional core samples can be used to obtain organic carbon parameters through organic geochemical analysis and testing, due to the needs of fine exploration in recent years, as well as the limitation of sample quantity and testing costs, limited core testing has been difficult to meet demand. Because of its high vertical resolution, well logging data are widely used in fine evaluation of source rocks. [0003] Since the 1960s, foreign scholars began to use logging data to identify source rocks. In recent years, with the deepening of research, domestic and foreign scholars have done a lot of research work, which has made great ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06Q10/04G06Q50/02E21B49/00
CPCG06Q10/04G06Q50/02E21B49/00Y02P90/84
Inventor 王祥马劲风王震亮李琳王浩璠
Owner NORTHWEST UNIV(CN)
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