DENG ShiBiao, GUAN Ping, PANG Lei, LIU PeiXian, JIN YiQiu, ZHANG YanQiu. Genesis of Excellent Xiaoerbulak Microbial Carbonate Reservoir in Kalpin Area of Tarim Basin, NW China[J]. Acta Sedimentologica Sinica, 2018, 36(6): 1218-1232. doi: 10.14027/j.issn.1000-0550.2018.084
Citation:
DENG ShiBiao, GUAN Ping, PANG Lei, LIU PeiXian, JIN YiQiu, ZHANG YanQiu. Genesis of Excellent Xiaoerbulak Microbial Carbonate Reservoir in Kalpin Area of Tarim Basin, NW China[J]. Acta Sedimentologica Sinica, 2018, 36(6): 1218-1232. doi: 10.14027/j.issn.1000-0550.2018.084
Genesis of Excellent Xiaoerbulak Microbial Carbonate Reservoir in Kalpin Area of Tarim Basin, NW China
Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing 100871, China;
2.
Oil and Gas Research Center, Peking University, Beijing 100871, China;
3.
Research Institute of Exploration and Development, PetroChina, Beijing 100083, China;
4.
Research Institute of Exploration and Development, Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000, China
Funds:
National Basic Research Program of China(973 Program), No.2012CB214801
Received Date: 2017-09-14
Rev Recd Date:
2017-11-14
Publish Date:
2018-12-10
Abstract
Microbial carbonate reservoirs are important research field of oil and gas geology, especially for oil-gas reservoirs. Regarding to the debate of excellent reservoirs of ancient and deep buried Xiaoerbulak microbial carbonate rocks in the Tarim Basin and their genesis, the Xiaoerbulak microbial carbonate rocks in the Kalpin area were investigated and studied systematically through field outcrops observation, section measurement, dense sampling, property test, thin section analysis and CT scanning in this paper. The results showed that the thrombolite with bright crystalline clotted texture was the excellent microbial carbonate reservoir of the Xiaoerbulak Formation with the max porosity about 9.35%. The proportion of porosity between 2.69% and 9.35% was 70.3%, the mean porosity was 5.07%, and there was an excellent positive linear correlation between the porosity and permeability of the rocks, suggesting the thrombolite as the excellent porous microbial carbonate reservoir of the Xiaoerbulak Formation. The excellent reservoir was composed of 6 types of reservoir spaces including intergranular pore, intercrystalline pore, intergranular dissolution pore, intercrystalline dissolution pore, extensive dissolution pore and dissolution vuge. The bright crystalline clotted texture formed in the high energy primary sedimentary environments of the upper subtidal zone provided the precondition for the thrombolite to form excellent microbial carbonate reservoir. Hydrothermal dissolution forming abundant large aperture fabric non-selective extensive dissolution pores and dissolution vuges were vital diagenesis process during the formation process of excellent reservoir, largely developing the porosity of thrombolite. This study can not only deepen the understanding of the type and genesis of the excellent Xiaoerbulak microbial carbonate reservoirs, but also provide sedimentary accordance for the effective selection of fair target in the future exploration.
Xin Jin，Jin-Min Song，Shu-Gen Liu，Bin Wang，Di Yang，Zhi-Wu Li，Li-Zhou Tian，Hao-Shuang Deng，Shan Ren，Jia-Min Xue，Jia-Xin Guo，Zhao-Yi Zhang，Xing-Peng Shao. Coupled effects of paleofluid evolution on ultra-deep microbialite reservoir modification:A case study of the upper Ediacaran Deng-2 member within the Penglai area of Central Sichuan Basin, SW China. Petroleum Science. 2025(02): 527-545 .
1. Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing 100871, China;
2. Oil and Gas Research Center, Peking University, Beijing 100871, China;
3. Research Institute of Exploration and Development, PetroChina, Beijing 100083, China;
4. Research Institute of Exploration and Development, Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000, China
Funds:
National Basic Research Program of China(973 Program), No.2012CB214801
Abstract: Microbial carbonate reservoirs are important research field of oil and gas geology, especially for oil-gas reservoirs. Regarding to the debate of excellent reservoirs of ancient and deep buried Xiaoerbulak microbial carbonate rocks in the Tarim Basin and their genesis, the Xiaoerbulak microbial carbonate rocks in the Kalpin area were investigated and studied systematically through field outcrops observation, section measurement, dense sampling, property test, thin section analysis and CT scanning in this paper. The results showed that the thrombolite with bright crystalline clotted texture was the excellent microbial carbonate reservoir of the Xiaoerbulak Formation with the max porosity about 9.35%. The proportion of porosity between 2.69% and 9.35% was 70.3%, the mean porosity was 5.07%, and there was an excellent positive linear correlation between the porosity and permeability of the rocks, suggesting the thrombolite as the excellent porous microbial carbonate reservoir of the Xiaoerbulak Formation. The excellent reservoir was composed of 6 types of reservoir spaces including intergranular pore, intercrystalline pore, intergranular dissolution pore, intercrystalline dissolution pore, extensive dissolution pore and dissolution vuge. The bright crystalline clotted texture formed in the high energy primary sedimentary environments of the upper subtidal zone provided the precondition for the thrombolite to form excellent microbial carbonate reservoir. Hydrothermal dissolution forming abundant large aperture fabric non-selective extensive dissolution pores and dissolution vuges were vital diagenesis process during the formation process of excellent reservoir, largely developing the porosity of thrombolite. This study can not only deepen the understanding of the type and genesis of the excellent Xiaoerbulak microbial carbonate reservoirs, but also provide sedimentary accordance for the effective selection of fair target in the future exploration.
DENG ShiBiao, GUAN Ping, PANG Lei, LIU PeiXian, JIN YiQiu, ZHANG YanQiu. Genesis of Excellent Xiaoerbulak Microbial Carbonate Reservoir in Kalpin Area of Tarim Basin, NW China[J]. Acta Sedimentologica Sinica, 2018, 36(6): 1218-1232. doi: 10.14027/j.issn.1000-0550.2018.084
Citation:
DENG ShiBiao, GUAN Ping, PANG Lei, LIU PeiXian, JIN YiQiu, ZHANG YanQiu. Genesis of Excellent Xiaoerbulak Microbial Carbonate Reservoir in Kalpin Area of Tarim Basin, NW China[J]. Acta Sedimentologica Sinica, 2018, 36(6): 1218-1232. doi: 10.14027/j.issn.1000-0550.2018.084
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DENG ShiBiao, GUAN Ping, PANG Lei, LIU PeiXian, JIN YiQiu, ZHANG YanQiu. Genesis of Excellent Xiaoerbulak Microbial Carbonate Reservoir in Kalpin Area of Tarim Basin, NW China[J]. Acta Sedimentologica Sinica, 2018, 36(6): 1218-1232. doi: 10.14027/j.issn.1000-0550.2018.084
DENG ShiBiao, GUAN Ping, PANG Lei, LIU PeiXian, JIN YiQiu, ZHANG YanQiu. Genesis of Excellent Xiaoerbulak Microbial Carbonate Reservoir in Kalpin Area of Tarim Basin, NW China[J]. Acta Sedimentologica Sinica, 2018, 36(6): 1218-1232. doi: 10.14027/j.issn.1000-0550.2018.084
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