Influences of Permian igneous rock on seismic imaging of underlying strata in the Hanilcatam area, Tarim Basin, China
Large-scale Permian igneous rock is developed in the Hanilcatam area, Tarim Basin. In order to accurately capture influences of thick igneous rock on seismic imaging of its underlying strata based on actual drilling, well logging and 3D seismic data, the simplified Cambrian-Cretaceous geological mod...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2019-02-01
|
| Series: | Journal of Natural Gas Geoscience |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2468256X19300069 |
| _version_ | 1797725242672545792 |
|---|---|
| author | Dong Sun Xiaoqian Shi Zhenqing Wang Lixin Chen Jing Wang Jiaqing Sun Dongdong Dai Qifei Fang |
| author_facet | Dong Sun Xiaoqian Shi Zhenqing Wang Lixin Chen Jing Wang Jiaqing Sun Dongdong Dai Qifei Fang |
| author_sort | Dong Sun |
| collection | DOAJ |
| description | Large-scale Permian igneous rock is developed in the Hanilcatam area, Tarim Basin. In order to accurately capture influences of thick igneous rock on seismic imaging of its underlying strata based on actual drilling, well logging and 3D seismic data, the simplified Cambrian-Cretaceous geological model is built, and the finite difference method is used to solve the elastic wave equation. The forward modeling of the wave equation is carried out to truly restore the seismic imaging process, and identify the influence of the Permian igneous rock body on seismic imaging of underlying strata, in an attempt to provide certain guidance on exploration and development of Paleozoic oil and gas reservoirs. The results show that the high-velocity high-density Permian dacite has shielding effects on seismic imaging of underlying strata, and the amplitude of the reflected wave of the underlying strata is obviously reduced, relative to that of the periphery of the dacite-overlay zone. Due to the lateral sudden change of lithology, seismic imaging of underlying layers presents obvious deformation and structural anomalies, which are not seismic responses of fault zones or volcanic channels. The wave field of the fracture-cavity body in the chaotic reflection zone or overlay by igneous rock is very complex and the imaging velocity is difficult to select accurately, which leads to false migration features and challenging convergence of seismic reflection displayed as “a string of beads”. Keywords: Permian system, Igneous rock, Seismic imaging, Forward modeling, Carbonate rock |
| first_indexed | 2024-03-12T10:28:21Z |
| format | Article |
| id | doaj.art-ff38d06c2074416ea5ea3149abaabead |
| institution | Directory Open Access Journal |
| issn | 2468-256X |
| language | English |
| last_indexed | 2024-03-12T10:28:21Z |
| publishDate | 2019-02-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Natural Gas Geoscience |
| spelling | doaj.art-ff38d06c2074416ea5ea3149abaabead2023-09-02T09:31:21ZengKeAi Communications Co., Ltd.Journal of Natural Gas Geoscience2468-256X2019-02-01417177Influences of Permian igneous rock on seismic imaging of underlying strata in the Hanilcatam area, Tarim Basin, ChinaDong Sun0Xiaoqian Shi1Zhenqing Wang2Lixin Chen3Jing Wang4Jiaqing Sun5Dongdong Dai6Qifei Fang7Northwest Branch of PetroChina Research Institute of Exploration and Development, Lanzhou, 730020, China; Corresponding author.Northwest Branch of PetroChina Research Institute of Exploration and Development, Lanzhou, 730020, ChinaNorthwest Branch of PetroChina Research Institute of Exploration and Development, Lanzhou, 730020, ChinaExploration and Development Research Institute, Tarim Oilfield Company, PetroChina, Korla, 841000, ChinaNorthwest Branch of PetroChina Research Institute of Exploration and Development, Lanzhou, 730020, ChinaNorthwest Branch of PetroChina Research Institute of Exploration and Development, Lanzhou, 730020, ChinaNorthwest Branch of PetroChina Research Institute of Exploration and Development, Lanzhou, 730020, ChinaNorthwest Branch of PetroChina Research Institute of Exploration and Development, Lanzhou, 730020, ChinaLarge-scale Permian igneous rock is developed in the Hanilcatam area, Tarim Basin. In order to accurately capture influences of thick igneous rock on seismic imaging of its underlying strata based on actual drilling, well logging and 3D seismic data, the simplified Cambrian-Cretaceous geological model is built, and the finite difference method is used to solve the elastic wave equation. The forward modeling of the wave equation is carried out to truly restore the seismic imaging process, and identify the influence of the Permian igneous rock body on seismic imaging of underlying strata, in an attempt to provide certain guidance on exploration and development of Paleozoic oil and gas reservoirs. The results show that the high-velocity high-density Permian dacite has shielding effects on seismic imaging of underlying strata, and the amplitude of the reflected wave of the underlying strata is obviously reduced, relative to that of the periphery of the dacite-overlay zone. Due to the lateral sudden change of lithology, seismic imaging of underlying layers presents obvious deformation and structural anomalies, which are not seismic responses of fault zones or volcanic channels. The wave field of the fracture-cavity body in the chaotic reflection zone or overlay by igneous rock is very complex and the imaging velocity is difficult to select accurately, which leads to false migration features and challenging convergence of seismic reflection displayed as “a string of beads”. Keywords: Permian system, Igneous rock, Seismic imaging, Forward modeling, Carbonate rockhttp://www.sciencedirect.com/science/article/pii/S2468256X19300069 |
| spellingShingle | Dong Sun Xiaoqian Shi Zhenqing Wang Lixin Chen Jing Wang Jiaqing Sun Dongdong Dai Qifei Fang Influences of Permian igneous rock on seismic imaging of underlying strata in the Hanilcatam area, Tarim Basin, China Journal of Natural Gas Geoscience |
| title | Influences of Permian igneous rock on seismic imaging of underlying strata in the Hanilcatam area, Tarim Basin, China |
| title_full | Influences of Permian igneous rock on seismic imaging of underlying strata in the Hanilcatam area, Tarim Basin, China |
| title_fullStr | Influences of Permian igneous rock on seismic imaging of underlying strata in the Hanilcatam area, Tarim Basin, China |
| title_full_unstemmed | Influences of Permian igneous rock on seismic imaging of underlying strata in the Hanilcatam area, Tarim Basin, China |
| title_short | Influences of Permian igneous rock on seismic imaging of underlying strata in the Hanilcatam area, Tarim Basin, China |
| title_sort | influences of permian igneous rock on seismic imaging of underlying strata in the hanilcatam area tarim basin china |
| url | http://www.sciencedirect.com/science/article/pii/S2468256X19300069 |
| work_keys_str_mv | AT dongsun influencesofpermianigneousrockonseismicimagingofunderlyingstratainthehanilcatamareatarimbasinchina AT xiaoqianshi influencesofpermianigneousrockonseismicimagingofunderlyingstratainthehanilcatamareatarimbasinchina AT zhenqingwang influencesofpermianigneousrockonseismicimagingofunderlyingstratainthehanilcatamareatarimbasinchina AT lixinchen influencesofpermianigneousrockonseismicimagingofunderlyingstratainthehanilcatamareatarimbasinchina AT jingwang influencesofpermianigneousrockonseismicimagingofunderlyingstratainthehanilcatamareatarimbasinchina AT jiaqingsun influencesofpermianigneousrockonseismicimagingofunderlyingstratainthehanilcatamareatarimbasinchina AT dongdongdai influencesofpermianigneousrockonseismicimagingofunderlyingstratainthehanilcatamareatarimbasinchina AT qifeifang influencesofpermianigneousrockonseismicimagingofunderlyingstratainthehanilcatamareatarimbasinchina |