Heavy oil-based quantitative identification chart interpretation method with gas logging
A technology of gas logging and quantitative identification, applied in data processing applications, instruments, calculations, etc., can solve the problems of difficult effective comparison of oil and water layers, one-sided evaluation of mud logging technology, etc., achieve good application prospects, high identification degree, and improve The effect of accuracy
Inactive Publication Date: 2017-02-22
CHINA NAT OFFSHORE OIL CORP +1
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[0004] In order to solve the existing problems, the present invention provides a heavy oil-based gas logging quantitative identification plate interpretation method, which solves the relatively one-sided evaluation of mud logging technology in the prior art, and the evaluation of oil and water layers in subsequent wells in the same research area Difficult to compare effectively
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[0019] The specific realization method of the present invention is based on the heavy oil gas logging quantitative identification plate interpretation method, and the specific steps are as follows:
[0020] 1. Parameter collection:
[0021] Gas logging parameter collection: gas logging parameter collection is suitable for quantitative degasser for gas degassing, and the collection parameters are: total hydrocarbon TG (ppm) and various hydrocarbon components C1 (ppm), C2 (ppm), C3 (ppm ), nC4 (ppm), iC4 (ppm), nC5 (ppm), iC5 (ppm) content.
[0022] Comprehensive mud logging parameter acquisition: comprehensive mud logging parameters are applicable to the data collected by the comprehensive mud logging instrument, including the drilling time ROP (min / m) reflecting the reservoir lithology, the late arrival time of the well depth and the oil and gas channeling speed for calculating the mud logging parameters, etc. parameter.
[0023] As mentioned above, each mud logging paramete...
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The invention discloses a heavy oil-based quantitative identification chart interpretation method with gas logging. An oil-water layer is quantitatively identified by comprehensively applying gas logging parameters, the concept that the oil-water layer is identified by use of a concentric circle chart of parameters of a methane-ethane logarithmic ratio and a light-heavy hydrocarbon logarithmic ratio is provided for the first time. The method is characterized by comprising the steps of: a step of parameter acquisition, selecting various parameters including a heavy hydrocarbon component in gas logging; a step of parameter preprocessing, carrying out parameter evaluation by use of the ratio of the sum of hydrocarbon components to total hydrocarbon, and excluding an oil layer with the thickness of less than 1m in consideration of the limitation of the gas logging technology; a step of parameter calculation, calculating two derivative parameters of the methane-ethane logarithmic ratio and the light-heavy hydrocarbon logarithmic ratio; and a step of establishment of an oil-layer quantitative identification chart, respectively drawing a graphic bar by use of gas logging hydrocarbon component derivative parameters of the methane-ethane logarithmic ratio and the light-heavy hydrocarbon logarithmic ratio according to a drilled measured result. According to the method, the oil-water layer in a reservoir stratum is qualitatively and semi-quantitatively identified by use of a comprehensive logging technology, the first-hand logging information can be fully discovered, and the oil-water layer can be evaluated rapidly and reliably.
Description
technical field [0001] The patent of the invention belongs to the field of wellbore technology in the petroleum exploration industry, and in particular relates to a method for interpreting quantitative identification charts of gas logging and mud logging based on heavy oil. Background technique [0002] The mud logging data obtained by drilling in oil and gas geological exploration is the most intuitive and important first-hand data for identifying oil and gas layers, and it is also the basic data for comprehensive analysis and evaluation of oil, gas, and water layers. Among them, gas logging is to measure and analyze the composition and content of natural gas in drilling fluid, and judge the properties of formation fluid based on this, so as to discover oil and gas layers in time, which is one of the most important mud logging techniques. Compared with other mud logging data, the gas logging data has the following three advantages: (1) universality: each well has gas loggin...
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IPC IPC(8): G06Q50/02G06F17/30G06F17/50
CPCG06F16/245G06F16/248G06F30/20G06Q50/02
Inventor 张参官大勇刘朋波王玉秀张宏国赵野岳军培苏凯
Owner CHINA NAT OFFSHORE OIL CORP
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