Device for extracting primary carbonate lattice sulfate in carbonate rock

Abstract

The invention provides a device for extracting primary carbonate lattice sulfate in carbonate rock. The device comprises a carbonate rock-acetic acid reaction unit, an acetic acid feeding unit, a sulfate radical-barium salt reaction unit and a barium salt feeding unit, wherein a discharge port of the acetic acid feeding unit is communicated with a feed port of the carbonate rock-acetic acid reaction unit; a discharge port of the carbonate rock-acetic acid reaction unit and a discharge port of the barium salt feeding unit are both communicated with a feed port of the sulfate radical-barium salt reaction unit. All the units of the device are simple in connection and good in sealing performance, air can be effectively isolated, sulfur isotopes are prevented from being separated in the operation process, sulfur elements in other minerals are prevented from influencing the sulfur isotopes in CAS, and therefore high-purity native CAS can be extracted.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas geochemistry, in particular to a device for extracting primary carbonate lattice sulfate in carbonate rocks. Background technique [0002] Carbonate rocks are rocks that contain more than 50% carbonate minerals. Carbonate rocks can be used as oil and natural gas reservoirs or source rocks. Carbonate rock oil and gas resource reserves account for about 50% of the world's total reserves, and its oil and gas production accounts for more than 60% of the world's total oil and gas production. Carbonate oil and gas reservoirs also have a very important position in my country, except for the traditional carbonate reservoirs of the Renqiu Proterozoic, the Sinian-Permian-Triassic in Northwest Sichuan, and the Paleogene in the Zhanhua Sag. , the newly discovered Ordovician ultra-deep carbonate reservoirs in the Tarim Basin had a peak production equivalent of more than 3.7×10 6 t has become...

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Problems solved by technology

Therefore, a very small amount of pyrite oxidation has a great influence on the extraction purity of primary CAS, thereby seriously affecting the test results of primary CAS content and sulfur isotope

[0009] With my country's in-depth research on emerging energy fields such as deep-ultra-deep carbonate oil and gas reservoirs and natural gas hydrate deposits, the precision required for exploration is getting higher and higher, and the purity requirements for primary CAS are also stricter. There are technologies but no equipment conditions can meet the high-precision extraction of native CAS of carbonate rock samples

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