Method and device for determining effective reservoir of altered volcanic rock in oil and gas exploration

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

Active Publication Date: 2016-04-06
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

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  • Method and device for determining effective reservoir of altered volcanic rock in oil and gas exploration
  • Method and device for determining effective reservoir of altered volcanic rock in oil and gas exploration
  • Method and device for determining effective reservoir of altered volcanic rock in oil and gas exploration

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Embodiment

[0097] Such as Figure 9 As shown, it is a flow chart of the method for evaluating effective reservoirs of altered volcanic rocks and predicting oil and gas productivity in the embodiment. include:

[0098] Step S901: According to the geological conditions of the research area, determine the volcanic rock development section and the main volcanic rock types of the well to be processed;

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

[0100] Step S902: Selecting different unaltered volcanic rock lithology parameter values ​​in the treated well section in the research area;

[0101] In this embodiment, the sonic time difference Δt of different volcanic rock types that have not been altered in the processed well section is determined ma , lithological density ρ base , compensated neutron CNL base , natural gamma GR base .

[0102] Use the follow...

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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 oil and gas exploration and development of altered volcanic rocks, in particular to a method and device for determining effective reservoirs of altered volcanic rocks in oil and gas exploration. Background technique [0002] China is rich in volcanic 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 field of oil and gas exploration and development, and many volcanic rock oil and gas fields have been discovered successively, such as Qingshen Gas Field, Karamay Gas Field, Niudong Oil Field, and Carboniferous Oil Field in the northwest margin of the 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 strong heterogeneity of volcanic rock reservoirs, conventional reservoir evaluation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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