Altered volcano rock effective reservoir determination method ad device in oil-gas exploration

A technology for volcanic rocks and oil and gas layers, which is applied in the field of determination of effective reservoirs of altered volcanic rocks in oil and gas exploration, which can solve the problems that the effective reservoirs of altered volcanic rocks cannot be accurately determined, and achieve the effect of meeting production needs and improving determination accuracy

Active Publication Date: 2014-03-05
PETROCHINA CO LTD
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Problems solved by technology

[0009] In order to solve the above problems, the present invention proposes a method and device for determining effective reservoirs of altered volcanic rocks in oil and gas exploration, to at least solve the inability to accurately determine the effective reservoirs of altered volcanic rocks due to the strong heterogeneity of altered volcanic rocks in the prior art technical issues

Method used

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  • Altered volcano rock effective reservoir determination method ad device in oil-gas exploration
  • Altered volcano rock effective reservoir determination method ad device in oil-gas exploration
  • Altered volcano rock effective reservoir determination method ad device in oil-gas exploration

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Embodiment

[0097] Such as Picture 9 Shown is a flowchart of the method for evaluating the effective reservoir of altered volcanic rock and predicting the oil and gas productivity of the embodiment. include:

[0098] Step S901: According to the geological conditions of the study area, determine the volcanic rock development interval of the processed well and the main volcanic rock type;

[0099] In this embodiment, the volcanic rock type of the well section to be processed is determined according to data such as rock slices and geochemical analysis.

[0100] Step S902: select different unaltered volcanic rock parameter values ​​of the processed well section in the study area;

[0101] In this example, the sonic time difference Δt of different volcanic rock types that are not altered in the treated well section is determined ma , Lithological density ρ base , Compensated neutron CNL base , Natural gamma GR base .

[0102] Use the following formula to obtain the total porosity of each processed...

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Abstract

The invention relates to an altered volcano rock effective reservoir determination method and device in oil-gas exploration. The method includes the steps of determining the volcanic rock development layer type and the volcanic rock type of a processed well section, selecting lithologic parameter values of different unaltered volcanic rocks of the processes well section according to the volcanic rock development layer type and the volcanic rock type, obtaining a rock alteration factor of the processed well section by the utilization of the lithologic parameter values of the different unaltered volcanic rocks according to the change relation of the volcanic rock alteration degree and logging response on the basis of conventional logging data, obtaining a reservoir quality factor of the processed well section according to porosity, deep lateral resistivity, shallow lateral resistivity on the basis of the conventional logging data, and determining an altered volcano rock effective reservoir according to the fact that the difference between the reservoir quality factor and the rock alteration factor and full-diameter core storage-percolation capability are in a linear positive correlation relationship.

Description

Technical field [0001] The invention relates to the technical field of altered volcanic rock oil and gas exploration and development, in particular to a method and device for determining an altered volcanic rock effective reservoir in oil and gas exploration. Background technique [0002] China is rich in volcanic rock oil and gas resources and has broad prospects for exploration and development. In recent years, volcanic rock oil and gas reservoirs have become an important area of ​​oil and gas exploration and development. Many volcanic rock oil and gas fields have been discovered, such as Qingshen Gas Field, Karamay Gas Field, Niudong Oil Field, and Carboniferous Oil Field in the Northwestern Margin of Junggar Basin. As of 2012, volcanic rock oil and gas reservoirs have been proven. The oil and gas equivalent of more than 1.2 billion tons. Due to the complex structure and high heterogeneity of volcanic reservoirs, conventional reservoir evaluation and oil and gas productivity ...

Claims

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Application Information

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IPC IPC(8): G01V9/00
Inventor 侯连华王京红朱如凯杨春杨帆毛治国
Owner PETROCHINA CO LTD
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