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Method for quantitatively calculating hot compaction strength

A quantitative calculation and practical technology, applied in the field of oil and gas and geological exploration, can solve the problems of immaturity, lack of quantitative calculation method of thermal compaction loss porosity, etc., and achieve the effect of increasing reliability

Pending Publication Date: 2019-08-06
NORTHWEST UNIV(CN) +1
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Problems solved by technology

[0003] At present, domestic and foreign scholars are still immature in the research on pore loss caused by thermal compaction effect (action), lack of research on thermal compaction pore reduction mechanism and thermal compaction loss porosity quantitative calculation method

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  • Method for quantitatively calculating hot compaction strength
  • Method for quantitatively calculating hot compaction strength

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Embodiment 1

[0035] Embodiment 1: a kind of method for hot compaction intensity quantitative calculation, this method comprises the following steps:

[0036] 1) Investigate and copy the geological data and literature data from the library or the Internet, find out the basic characteristics of the research object such as terrain, geographical location and historical characteristics, and find out representative and nearby typical geological landforms through screening. experiment;

[0037] 2) According to the evidence of thermal fluid activity and according to the current geothermal gradient data of a single well, the selected research area is divided into low geothermal gradient area, medium geothermal gradient area and high geothermal gradient area, and the characteristics and mechanism of compaction in different geothermal gradient areas are studied and compared difference;

[0038] 3) Drilling 6 single wells in the selected research area for experiments, and using several empirical form...

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Abstract

The invention discloses a method for quantitatively calculating the hot compaction action strength. According to the technical scheme, the method comprises the steps that representative nearby typicalgeological landforms are screened and found out for experiments; the selected research area is divided into a plurality of ground temperature gradient areas; compaction effect characteristics and mechanism differences of different ground temperature gradient areas are researched and compared; quantitative relations among different ground temperature gradient areas, buried depths and sandstone porosities are calculated; calculating results of different single wells are compared to judge the original porosity difference of different single wells and the change of the compaction loss porosity ofdifferent wells along with the current ground temperature gradient; and finally obtaining a quantitative calculation method for a hot compaction pore reduction mechanism and hot compaction loss porosity. The method assists to study and analyze a sedimentary basin lithofacies formation mechanism, an evolution process, influence on reservoir physical properties and influence on oil gas geology, provides a powerful guiding effect for prediction of multiple types of high-quality reservoirs, and facilitates oil field exploration and mineral exploration deployment.

Description

technical field [0001] The invention relates to the technical field of oil and gas and geological exploration, in particular to a method for quantitative calculation of thermal compaction intensity. Background technique [0002] Compaction is an important part of diagenesis and one of the important factors for the reduction of reservoir physical properties. The traditional theory of diagenesis holds that the compaction of clastic sediments is produced by the effective stress of the overlying rock pillars. When clastics are deposited and buried in the basin, the temperature and pressure of the overlying strata continue to rise. The porosity and permeability of sediments gradually decreased; in recent years, with the in-depth study of diagenesis mechanism, it was found that the compaction of reservoirs in the geological history period was not only controlled by the overlying rock load and the sedimentary type, but also by Formation fluid properties, geothermal gradient field ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 李弛罗静兰庞雄雷川陈亮柳保军马永坤孙辉宋昆鹏
Owner NORTHWEST UNIV(CN)
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