Method for recognizing oil-gas possibility of underlayer structure

A technology of oil and gas nature and structure, applied in the field of oil and gas exploration, can solve the problems of abnormal lateral migration of light hydrocarbons, etc., and achieve the effect of high success rate and low exploration cost

Active Publication Date: 2014-11-05
ADVANCED ENERGY & ENVIRONMENTAL TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the influence of geological conditions such as regional unconformities or active fault zones, lateral migration of light hydrocarbons will occur and abnormal migration will occur

Method used

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  • Method for recognizing oil-gas possibility of underlayer structure
  • Method for recognizing oil-gas possibility of underlayer structure
  • Method for recognizing oil-gas possibility of underlayer structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: The relationship between the characteristics of light hydrocarbons in the surface soil of a region in western China and the oil and gas content of the underlying structures

[0029] According to the project design, an area of ​​more than 100 square kilometers of known oil and gas wells was selected, and a total of more than 1,000 stations were sampled with a fixed-space grid.

[0030] (1) Sample collection: After packing in a special paper bag, dry it in an oven overnight and transport it back to the laboratory.

[0031] (2) Experimental analysis (take acid-desorbed hydrocarbons in soil light hydrocarbons as an example):

[0032] Acidolysis hydrocarbon: Hydrocarbons that migrate from oil and gas reservoirs to the loose layer on the surface, that is, gaseous hydrocarbons (adsorbed hydrocarbons) that exist in the gaps between soil mineral particles as free gases and are fixed by adsorption on the surface of soil minerals The adsorbed hydrocarbons (occluded hyd...

Embodiment 2

[0067] Example 2: The relationship between the characteristics of light hydrocarbons in seabed sediments in a certain sea area of ​​China and the oil and gas bearing properties of underlying structures

[0068] According to the project design, a measuring line of about 248 km in length was selected for known oil and gas wells, and a total of more than 30 stations were uniformly sampled at fixed intervals. Sample collection and experimental analysis operations are the same as in Example 1.

[0069] After obtaining the soil light hydrocarbon data, calculate the internal composition parameters of light hydrocarbons through data analysis, make the frequency distribution diagram of each parameter and select the parameter C with obvious bimodal characteristics 1 / C 2 , the comparison line chart of this parameter with known oil and gas wells and dry wells on the logging line is shown in image 3 , showing the corresponding relationship between the C1 / C2 value of the composition par...

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Abstract

The invention relates to the technical field of oil-gas exploration, and discloses a method for recognizing the oil-gas possibility of an underlayer structure. The method comprises the steps of collecting light dydrocarbon of a known oil-gas well sample and obtaining relevant parameters of the light dydrocarbon through gas chromatography; drawing a frequency distribution diagram of the relevant parameters of the light dydrocarbon and screening out light dydrocarbon indexes with the right deflection feature or the two-peak feature in the frequency distribution diagram; drawing a broken line graph of the screened-out light dydrocarbon indexes on the section of a known oil-gas well or the section of a dry well or drawing a classification bubble diagram of the screened-out light dydrocarbon indexes on the plane, and comparing the broken line graph with the classification bubble diagram; screening out light dydrocarbon internal composition specific value parameters having correlation, wherein the light dydrocarbon internal composition specific value parameters serve as indexes to recognize the oil-gas possibility of the unknown underlayer structure. Compared with the existing oil-gas exploration technology, the method has the advantages of being low in exploration cost, short in period and high in success rate and having good industrial application prospects.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration, in particular to a method for judging the oil and gas content of an underlying strata structure. Background technique [0002] Oil and gas exploration refers to geological survey, geophysical exploration, drilling activities and other related activities to identify exploration areas or prove oil and gas reserves. It is the first key link in oil and gas extraction and the basis of oil and gas extraction projects. In order to find and ascertain oil and gas resources, use various exploration methods to understand the underground geological conditions, comprehensively evaluate oil and gas prospects, determine favorable areas for oil and gas accumulation, find traps for oil and gas storage, ascertain the area of ​​oil and gas fields, and find out the situation of oil and gas layers and production capacity. [0003] Oil and natural gas are mainly composed of hydrocarbons, and the hydro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30G01N30/86
Inventor 徐荣德郝纯邓诗财梅海
Owner ADVANCED ENERGY & ENVIRONMENTAL TECH INC
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