Method for characterizing dissolution degree of feldspar in water rock simulation experiment
A simulation experiment and dissolution technology, applied in the fields of weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc., can solve problems such as lack of influence on oil reservoirs
Pending Publication Date: 2020-10-16
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
At present, there is still a lack of relevant research on the mechanism of feldspar dissolution in geological structures and its impact on reservoir formation
Method used
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Embodiment 1
[0021] Taking mixed minerals as the research object, the CO-rich 2 Under the action of two different formation fluids, i.e. albite, potassium feldspar, calcite and dolomite, etc., the dissolution characteristics of various minerals under different temperature and pressure conditions were observed.
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The invention relates to a method for evaluating the dissolution degree of feldspar in a reservoir. The method comprehensively considers the content of two kinds of feldspar in a sample, the ion concentration and other factors, and also considers the diagenetic stage, the burying time and other problems, and reveals the mechanism for evaluating the dissolution of feldspar in a geological structureand the influence on the formation of an oil reservoir.
Description
technical field [0001] The invention relates to a method for characterizing the dissolution degree of feldspar in a water-rock simulation experiment, and belongs to the technical field of oil and gas layer accumulation mechanism in the field of petroleum exploration and development. Background technique [0002] Feldspar is an easily soluble silicate mineral in oil and gas reservoirs. The secondary pores formed by its dissolution under acidic conditions can be used as reservoir space for oil and gas, which is the main contribution of high-quality reservoirs in late diagenesis and deep burial conditions. By. The conclusions obtained from the existing water-rock simulation experiments all believe that acidic fluids are more corrosive to albite than potassium feldspar. However, recent studies have found that the dissolution of potassium feldspar in the deep layers of the Bozhong Sag in the Bohai Bay Basin is more common, which is not conducive to high-quality reservoirs. Howev...
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Login to View More IPC IPC(8): G01N5/00G01N17/00
CPCG01N5/00G01N17/00
Inventor 曲希玉蒋姚秀田曹婷婷高山刘成龙靳丰睿周宏飞
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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