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Complex lithology clastic rock stratum constituent logging processing method

A processing method and technology for complex lithology, applied in earthwork drilling, wellbore/well components, etc.

Inactive Publication Date: 2011-05-11
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the existing processing methods of clastic rock formation components, and provide a complex lithology clastic rock formation component logging The processing method, the invention solves the problem of coal-bearing formation identification and coal-bearing formation composition calculation, and solves the problem of applying two porosity logging curves to calculate three rock components and porosity of coal-free formation

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  • Complex lithology clastic rock stratum constituent logging processing method
  • Complex lithology clastic rock stratum constituent logging processing method
  • Complex lithology clastic rock stratum constituent logging processing method

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Embodiment Construction

[0025] A logging processing method for components of complex lithology clastic rock strata, which judges whether the stratum contains coal according to the characteristics of the logging curve, and classifies the strata according to whether the stratum contains coal or not; when the stratum contains coal, calculates the feldspar quartz , coal and porosity content; when the formation does not contain coal, the mixed lithology calculation method is used to calculate the content of feldspar quartz, calcareous, cuttings and porosity.

[0026] The specific process is as follows:

[0027] According to whether the log curve values ​​of compensated acoustic wave AC, compensated neutron CNL, density DEN, and deep lateral resistivity RT meet the standards of coal-bearing strata, it can be judged whether the stratum at the current depth point contains coal. The criteria for discrimination are: AC≥AC0 (AC0 is the lower limit of acoustic wave compensation in coal-bearing formations); RT≥RT...

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Abstract

The invention discloses a complex lithology clastic rock stratum constituent logging processing method which comprises the following steps: determining whether a stratum contains coal according to logging curve characteristics and respectively processing stratigraphic classification according to the situation that whether the stratum contains coal; calculating the contents of feldspar quartz, coal and porosity when the stratum contains coal; and calculating the contents of the feldspar quartz, calcium, rock debris and the porosity by applying a mixed lithology calculation method when the stratum contains no coal. The complex lithology clastic rock stratum constituent logging processing method solves the problems of coal-bearing stratum identification and coal-bearing stratum constituent calculation and also solves the problem of calculating three rock constituents in the coal-free stratum and the porosity by applying two porosity logging curves.

Description

technical field [0001] The invention relates to a logging processing method for components of complex lithology clastic rock strata, which is suitable for processing logging data of complex lithology clastic rock strata containing coal, feldspar quartz, cuttings and calcareous rocks. Background technique [0002] The current method for processing clastic formation components considers that the skeleton part is composed of a single sandstone, and does not calculate the relative content of the specific components of the rock skeleton. For example, Wang Yuwen et al. published "Siliciclastic Strata Simulation and Application Examples in Sedimentary Basins" in Volume 8, Issue 1 of "China Offshore Oil and Gas (Geology)" in 1994. [0003] When there are multiple lithologies in the formation, it will lead to inaccurate calculation results of reservoir parameters, and affect the accuracy of a series of evaluations related to rock content. The main reasons for the above problems are:...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
Inventor 胡振平甘秀娥姜艳玲罗利谢刚
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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