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Quantitative evaluation method for gas formation of dispersed soluble organic matter in high-over-mature stages

A quantitative evaluation and organic matter technology, which is applied in the direction of thermal detection/exploration, measurement device, geophysical measurement, etc., can solve the problems of difficult quantitative cracking of soluble organic matter outside the source and evaluation of the gas generation period and gas generation amount, and achieve rich The effect of geological theory, simple operation and short analysis period

Inactive Publication Date: 2018-10-23
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0008] The object of the present invention is to provide a kind of high-over-mature stage external source dispersed soluble organic matter gas quantitative evaluation method, aims to solve the high-over-mature stage external source dispersed soluble organic matter difficult quantitative problem and its cracking and gas generation period The problem of gas yield evaluation

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  • Quantitative evaluation method for gas formation of dispersed soluble organic matter in high-over-mature stages
  • Quantitative evaluation method for gas formation of dispersed soluble organic matter in high-over-mature stages
  • Quantitative evaluation method for gas formation of dispersed soluble organic matter in high-over-mature stages

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Embodiment 1

[0057] Taking the Sinian marine high-over-mature Dengying Formation in the Sichuan Basin as an example, the amount of residual hydrocarbon S1 in the reservoirs and migration channels is almost zero, while the residual invalid carbon content of oil cracked into gas is relatively high, which is the residual hydrocarbon S1 4 to 1200 times of (such as figure 2 ), it is more reasonable and accurate to use invalid carbon to inversely calculate the gas generation amount of dispersed soluble organic matter in high-over-mature formations. Taking the Leshan-Longnüsi paleo-uplift in central Sichuan and its surrounding areas as the target area, the gas-forming period and gas-forming amount of dispersed soluble organic matter in the Waideng 4 Member reservoir of the Qiongzhusi source rock were evaluated.

[0058] Step 1. Evaluation of the invalid carbon content in Deng 4 member reservoir and migration channel

[0059] The reservoir samples of Deng 4 Member were selected for organic carbo...

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Abstract

The invention discloses a high-over mature stage out-of-source disperse dissoluble organic matter gas generation quantitative evaluation method. The method comprises the following steps: carrying out quantitative evaluation on residual ineffective carbon obtained through reservoir oil cracking gas generation by selecting rock samples and a single well logging curve; establishing an out-of-source disperse dissoluble organic matter gas generation quantitative evaluation model, and determining ineffective carbon productivity, charging proportion of disperse dissoluble organic matters at each stage and gas generation conversion rate; and carrying out quantitative evaluation on high-over mature stage out-of-source disperse dissoluble organic matter gas generation amount and gas generation stage. The method enriches natural gas exploration geological theory; the high-over mature stage out-of-source disperse dissoluble organic matter gas generation evaluation method is improved; the method is used for determining the high-over mature stage out-of-source disperse dissoluble organic matter gas generation amount and gas generation stage; and the method has many advantages in evaluating the out-of-source disperse dissoluble organic matters on the basis of an ineffective carbon inversion technology method.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and relates to a quantitative evaluation method for gas formation of dispersed soluble organic matter in high-over-mature stages. Background technique [0002] Natural gas is an important high-quality energy source and a valuable chemical raw material. Its exploration and development are directly related to my country's energy security and economic development. The total amount of natural gas resources in my country is about 56 trillion cubic meters, of which 6.34 trillion cubic meters have been proven, and the proven rate is only 11.3%, which is far lower than the world average of 40%. This indicates that my country has a huge potential for natural gas resource exploration. With the gradual deepening of the research on the mechanism of natural gas generation and accumulation, scholars have made important progress in the research on the source of hydrocarbon natural gas, but they h...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V9/00
CPCG01V9/005
Inventor 田善思卢双舫薛海涛陈方文王民李吉君王伟明穆国栋曾芳
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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