Characteristics of hydrothermal activity in the Tarim Basin and its reworking effect on carbonate reservoirs
Hydrothermal activity is common in the Tarim Basin. In this paper, petrologic and geochemical features of the hydrothermal products in the carbonate rocks in this basin were analyzed so as to figure out the effect of hydrothermal activity on the Lower Palaeozoic carbonate reservoirs in this area. It...
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KeAi Communications Co., Ltd.
2016-05-01
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| Series: | Natural Gas Industry B |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352854016300547 |
| _version_ | 1797288460261785600 |
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| author | Wei Liu Qingyu Huang Kun Wang Shuyuan Shi Hua Jiang |
| author_facet | Wei Liu Qingyu Huang Kun Wang Shuyuan Shi Hua Jiang |
| author_sort | Wei Liu |
| collection | DOAJ |
| description | Hydrothermal activity is common in the Tarim Basin. In this paper, petrologic and geochemical features of the hydrothermal products in the carbonate rocks in this basin were analyzed so as to figure out the effect of hydrothermal activity on the Lower Palaeozoic carbonate reservoirs in this area. It is shown that the hydrothermal fluids in the Tarim Basin are generally high in CO2 content, but very low in Mg2+ content. Then, the reworking effect of hydrothermal activity on reservoir was further discussed. It is indicated that the component of hydrothermal fluid is the deciding factor for the reworking of reservoirs. The study provided the following findings. Firstly, hydrothermal fluid is rich in CO2. Dissolution is intense in the vicinity of fracture zones and dissolved pores of different sizes are developed. Therefore, small-scale high-quality reservoirs with good porosity and permeability are formed. Secondly, hydrothermal fluid itself is low in magnesium content and some additional magnesium can be produced from Cambrian dolomites by means of dissolution, but the scale of hydrothermal dolomitization is small. Thirdly, the hydrothermal fluids rich in CO2 form high-quality dissolved vug typed reservoirs by means of dissolving surrounding rocks and their distribution are controlled by faulting. Fourthly, the saddle-like dolomite with hydrothermal origin fills dissolved vugs. Furthermore, the hydrothermal activity in the vicinity of faults results in the recrystallization or excessive growth of dolomite crystal, blocking existed pores, which is a type of destructive diagenesis as a whole. The study results can provide a reference for carbonate reservoir prediction of deep basin. |
| first_indexed | 2024-03-07T18:49:48Z |
| format | Article |
| id | doaj.art-d0bffd714d9842a5a79b6f2d609f6a4c |
| institution | Directory Open Access Journal |
| issn | 2352-8540 |
| language | English |
| last_indexed | 2024-03-07T18:49:48Z |
| publishDate | 2016-05-01 |
| publisher | KeAi Communications Co., Ltd. |
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| series | Natural Gas Industry B |
| spelling | doaj.art-d0bffd714d9842a5a79b6f2d609f6a4c2024-03-02T01:56:21ZengKeAi Communications Co., Ltd.Natural Gas Industry B2352-85402016-05-013320220810.1016/j.ngib.2016.05.004Characteristics of hydrothermal activity in the Tarim Basin and its reworking effect on carbonate reservoirsWei Liu0Qingyu Huang1Kun Wang2Shuyuan Shi3Hua Jiang4China University of Petroleum, Beijing 102249, ChinaPetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, ChinaPetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, ChinaPetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, ChinaPetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, ChinaHydrothermal activity is common in the Tarim Basin. In this paper, petrologic and geochemical features of the hydrothermal products in the carbonate rocks in this basin were analyzed so as to figure out the effect of hydrothermal activity on the Lower Palaeozoic carbonate reservoirs in this area. It is shown that the hydrothermal fluids in the Tarim Basin are generally high in CO2 content, but very low in Mg2+ content. Then, the reworking effect of hydrothermal activity on reservoir was further discussed. It is indicated that the component of hydrothermal fluid is the deciding factor for the reworking of reservoirs. The study provided the following findings. Firstly, hydrothermal fluid is rich in CO2. Dissolution is intense in the vicinity of fracture zones and dissolved pores of different sizes are developed. Therefore, small-scale high-quality reservoirs with good porosity and permeability are formed. Secondly, hydrothermal fluid itself is low in magnesium content and some additional magnesium can be produced from Cambrian dolomites by means of dissolution, but the scale of hydrothermal dolomitization is small. Thirdly, the hydrothermal fluids rich in CO2 form high-quality dissolved vug typed reservoirs by means of dissolving surrounding rocks and their distribution are controlled by faulting. Fourthly, the saddle-like dolomite with hydrothermal origin fills dissolved vugs. Furthermore, the hydrothermal activity in the vicinity of faults results in the recrystallization or excessive growth of dolomite crystal, blocking existed pores, which is a type of destructive diagenesis as a whole. The study results can provide a reference for carbonate reservoir prediction of deep basin.http://www.sciencedirect.com/science/article/pii/S2352854016300547Tarim BasinEarly PalaeozoicHydrothermalCarbonateReservoirDolomitizationCO2DiagenesisDissolution |
| spellingShingle | Wei Liu Qingyu Huang Kun Wang Shuyuan Shi Hua Jiang Characteristics of hydrothermal activity in the Tarim Basin and its reworking effect on carbonate reservoirs Natural Gas Industry B Tarim Basin Early Palaeozoic Hydrothermal Carbonate Reservoir Dolomitization CO2 Diagenesis Dissolution |
| title | Characteristics of hydrothermal activity in the Tarim Basin and its reworking effect on carbonate reservoirs |
| title_full | Characteristics of hydrothermal activity in the Tarim Basin and its reworking effect on carbonate reservoirs |
| title_fullStr | Characteristics of hydrothermal activity in the Tarim Basin and its reworking effect on carbonate reservoirs |
| title_full_unstemmed | Characteristics of hydrothermal activity in the Tarim Basin and its reworking effect on carbonate reservoirs |
| title_short | Characteristics of hydrothermal activity in the Tarim Basin and its reworking effect on carbonate reservoirs |
| title_sort | characteristics of hydrothermal activity in the tarim basin and its reworking effect on carbonate reservoirs |
| topic | Tarim Basin Early Palaeozoic Hydrothermal Carbonate Reservoir Dolomitization CO2 Diagenesis Dissolution |
| url | http://www.sciencedirect.com/science/article/pii/S2352854016300547 |
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