| Multi-Phases Fluid Activity Characteristics of Longmaxi Formation and Its Impact on Resistivity in the Changning Area, Southern Sichuan Basin, Southwest China | |
Cui, Yue1,2 ; Li, Xizhe1,2; Han, Lingling1,2; Feng, Yong3; Guo, Wei2; Lin, Wei3; Qian C(钱超); Feng, Tao3
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| Source Publication | FRONTIERS IN EARTH SCIENCE
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| 2022-06 | |
| Volume | 10Pages:931012 |
| Abstract | Wells with low gas content and low resistivity in the Changning area, southern Sichuan Basin were selected for this study. The burial-thermal history was reconstructed and the characteristics of multi-phase fluid activity were clarified using microscopic observation and testing of fluid inclusions in the Longmaxi shale fracture veins. Compared with wells with a high gas content and high resistivity, the influence of fluid activity on resistivity was analyzed. The results showed that the thermal evolution of the bituminous inclusions trapped in the veins has reached the stage of carbonaceous-metamorphic bitumen, and the organic matter is fully cracked for gas generation, with some organic matter exhibiting the phenomenon of graphitization. The synchronous fluid with bitumen was existed due to shallow burial with a middle-low maturity stage of about 280 and 292 Ma. Two phases of fluids existed in the deep burial stage, thus maturing for about 103 Ma, and the uplift stage at about 28 and 32 Ma, with high homogenization temperatures (Th) (varying from 185 to 195 degrees C and 165-180 degrees C). The corresponding pressure coefficients varied between 1.67 and 2.09, 1.56 and 1.92 in a moderate-strong high-pressure state. The last two phases of fluid formation in the late uplift stage for about 4 to 19 Ma and 6 to 10 Ma were characterized by low salinity at medium-low Th (varied from 140 to 155 degrees C and 120-135 degrees C), with pressures of 57.47-74.50 MPa and 51.44-59.41 MPa (pressure coefficients of 1.09-1.41 and 1.18-1.37), in an atmospheric-weak overpressure state. In the initial uplift stage after deep burial, the fluid closure in the Changning area was good. In contrast, the wells are filled with low gas content because of the strong tectonic forces causing the shale gas to be released and the multi-phase fluid activity that happens during the late uplift stage. New evidence indicates that the emergence of low resistance in the localized Changning area is not only related to the high degree of evolution of organic matter but is also affected by the multi-phase fluid modification in the late uplift stage. |
| Keyword | southern Sichuan Basin Longmaxi formation calcite vein fluid inclusions fluid activities low resistivity |
| Subject Area | Geosciences, Multidisciplinary |
| DOI | 10.3389/feart.2022.931012 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000823037100001 |
| Funding Organization | Science and Technology Project of PetroChina Exploration and Production Company [kt 2021-11-01] ; Hubei Provincial Natural Science Foundation of China [2021CFB182] ; Experimental Research Center, School of Geosciences, Yangtze University, Wuhan, China |
| Classification | 二类 |
| Ranking | 3+ |
| Contributor | Li, XZ ; Han, LL (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China. ; Li, XZ ; Han, LL (corresponding author), Chinese Acad Sci, Inst Porous Flow & Fluid Mech, Langfang, Hebei, Peoples R China. ; Li, XZ ; Han, LL (corresponding author), Res Inst Petr Explorat & Dev, Beijing, Peoples R China. |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/90167 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Porous Flow & Fluid Mech, Langfang, Hebei, Peoples R China 3.Res Inst Petr Explorat & Dev, Beijing, Peoples R China 4.Yangtze Univ, Sch Geosci, Wuhan, Peoples R China 5.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing, Peoples R China |
| Recommended Citation GB/T 7714 | Cui, Yue,Li, Xizhe,Han, Lingling,et al. Multi-Phases Fluid Activity Characteristics of Longmaxi Formation and Its Impact on Resistivity in the Changning Area, Southern Sichuan Basin, Southwest China[J]. FRONTIERS IN EARTH SCIENCE,2022,10:931012.Rp_Au:Li, XZ, Han, LL (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China., Li, XZ, Han, LL (corresponding author), Chinese Acad Sci, Inst Porous Flow & Fluid Mech, Langfang, Hebei, Peoples R China., Li, XZ, Han, LL (corresponding author), Res Inst Petr Explorat & Dev, Beijing, Peoples R China. |
| APA | Cui, Yue.,Li, Xizhe.,Han, Lingling.,Feng, Yong.,Guo, Wei.,...&Feng, Tao.(2022).Multi-Phases Fluid Activity Characteristics of Longmaxi Formation and Its Impact on Resistivity in the Changning Area, Southern Sichuan Basin, Southwest China.FRONTIERS IN EARTH SCIENCE,10,931012. |
| MLA | Cui, Yue,et al."Multi-Phases Fluid Activity Characteristics of Longmaxi Formation and Its Impact on Resistivity in the Changning Area, Southern Sichuan Basin, Southwest China".FRONTIERS IN EARTH SCIENCE 10(2022):931012. |
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