Fluid logging oil-gas-water interpretation method based on oil-gas-water index chart

A fluid logging, oil-gas-water technology, applied in the direction of earthwork drilling, wellbore/well components, etc., can solve the problems of monotonous and weak interpretation methods, insufficient objective and comprehensive interpretation conclusions, and achieve high accuracy

Active Publication Date: 2014-03-26
CHINA NAT OFFSHORE OIL CORP +2
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Problems solved by technology

Existing interpretation methods fail to make full use of the heavy hydrocarbon component information collected by fluid logging, whi...

Method used

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  • Fluid logging oil-gas-water interpretation method based on oil-gas-water index chart
  • Fluid logging oil-gas-water interpretation method based on oil-gas-water index chart
  • Fluid logging oil-gas-water interpretation method based on oil-gas-water index chart

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Embodiment Construction

[0021] In view of the defects of the above-mentioned interpretation method, the present invention supplements the newly added gas components of the fluid logging technology into the gas interpretation and evaluation method, and proposes an oil-gas-water index chart. It can more comprehensively reflect the characteristics of oil, gas and water in the reservoir, further enrich and improve the fluid interpretation method, and greatly improve the interpretation accuracy. Good results have been achieved in practical applications.

[0022] The concrete implementation method of the present invention is the fluid logging oil-gas-water interpretation method based on the oil-gas-water index plate, and the specific steps are as follows:

[0023] 1. Parameter collection:

[0024] ①Fluid logging parameter collection: Fluid parameter collection uses a quantitative degasser for gas degassing, and the collection parameters are: total hydrocarbon TG (ppm) and various hydrocarbon components C ...

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Abstract

The invention provides a fluid logging oil-gas-water interpretation method based on an oil-gas-water index chart. The fluid logging oil-gas-water interpretation method is characterized by comprising the steps that parameters are collected, wherein the fluid logging parameters comprise heavy hydrocarbon components; the parameters are pre-processed, and the parameters capable of reflecting fluid quality changes in a stratum are selected; the parameters are calculated, wherein three derivative parameters comprising an oil index, a gas index and a water index capable of directly reflecting oil-gas-water characteristics are selected; the oil-gas-water index standard chart is built, wherein according to the a known oil test conclusion, a graphical bar is drawn on the basis of the three derivative parameters comprising the oil index, the gas index and the water index; parameter calculation is conducted on a target layer; the target layer is evaluated according to the standard chart. According to the fluid logging oil-gas-water interpretation method, quality of oil-gas-water in a collection layer is identified and judged by means of the fluid logging technique, a hydrocarbon reservoir is evaluated timely and accurately, and basis data are provided for selection of a well test method in follow-up shaft work, formulation of a test measurement, and selection of a test scheme timely.

Description

technical field [0001] The patent of the invention belongs to the oil-gas-water interpretation method of fluid logging based on the oil-gas-water index chart in the wellbore technical field of the petroleum exploration industry. Background technique [0002] Gas logging technology is an important technical means for petroleum exploration and development. The change of gas total hydrocarbons and components is an important basis for discovering oil and gas shows and judging oil, gas and water layers. The parameters used in gas logging technology interpretation and evaluation of oil and gas layers are limited to C 1 -nC 5 The interpretation methods of these seven gas components are mostly Pixler diagram method, triangular diagram method, 3H ratio method and so on. [0003] At present, gas logging technology has developed to the stage of fluid logging, and the content of fluid logging detection is more abundant, except for the C detected by conventional gas detection equipment...

Claims

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Application Information

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IPC IPC(8): E21B49/08
Inventor 吴立伟谭忠健夏庆龙尚锁贵马金鑫毛敏荆文明吴昊晟胡云黄小刚刘坤袁胜斌王建勇于喜吴建华
Owner CHINA NAT OFFSHORE OIL CORP
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