Diagenesis of deep sandstone reservoirs and a quantitative model of porosity evolution: Taking the third member of Shahejie Formation in the Wendong Oilfield, Dongpu Sag, as an example
The diagenesis and porosity evolution in the deep 3rd member of Shahejie Formation of the Wendong Oilfield was analyzed using thin-sections, casting thin-sections, X-ray diffractometry, scanning electron micrograph observations, and other data. Sandstone reservoirs are currently at the late diagenet...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2011-10-01
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| Series: | Petroleum Exploration and Development |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1876380411600554 |
| _version_ | 1818874928230825984 |
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| author | Ruifei Wang Pingping Shen Liangjin Zhao |
| author_facet | Ruifei Wang Pingping Shen Liangjin Zhao |
| author_sort | Ruifei Wang |
| collection | DOAJ |
| description | The diagenesis and porosity evolution in the deep 3rd member of Shahejie Formation of the Wendong Oilfield was analyzed using thin-sections, casting thin-sections, X-ray diffractometry, scanning electron micrograph observations, and other data. Sandstone reservoirs are currently at the late diagenetic period. Pores consist of primary pores and the inter-granular dissolved and intra-granular dissolved pores of feldspar, debris and carbonate cements. Physical properties are mainly controlled by carbonate cementation and dissolution, and distribution of abnormally high fluid pressure. The evolution of porosity parameters shows that primary porosity is 36.75%, the porosity loss rate is 40.49% during the process of mechanic compaction, the porosity loss rate is 37.25% during the process of cementation and metasomasis, and the porosity increase rate is 17.88% during the process of dissolution. The proportion of primary porosity is 55.03%, and that of the secondary porosity is 44.97%. The error rate in the quantitative study of porosity is 0.96%, and the main influencing factor of the error rate is sorting coefficient of detrital rock (S0). Key words: deep reservoir, Dongpu Sag, Wendong Oilfield, porosity evolution model, secondary pore |
| first_indexed | 2024-12-19T13:18:23Z |
| format | Article |
| id | doaj.art-eb742cc597134e35af7c55fe4693cb42 |
| institution | Directory Open Access Journal |
| issn | 1876-3804 |
| language | English |
| last_indexed | 2024-12-19T13:18:23Z |
| publishDate | 2011-10-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Petroleum Exploration and Development |
| spelling | doaj.art-eb742cc597134e35af7c55fe4693cb422022-12-21T20:19:46ZengKeAi Communications Co., Ltd.Petroleum Exploration and Development1876-38042011-10-01385552559Diagenesis of deep sandstone reservoirs and a quantitative model of porosity evolution: Taking the third member of Shahejie Formation in the Wendong Oilfield, Dongpu Sag, as an exampleRuifei Wang0Pingping Shen1Liangjin Zhao2College of Petroleum Engineering, Xi'an Shiyou University, Xi'an 710065, China; Corresponding authorPetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, ChinaSinopec Zhongyuan Oilfield Company, Puyang 457001, ChinaThe diagenesis and porosity evolution in the deep 3rd member of Shahejie Formation of the Wendong Oilfield was analyzed using thin-sections, casting thin-sections, X-ray diffractometry, scanning electron micrograph observations, and other data. Sandstone reservoirs are currently at the late diagenetic period. Pores consist of primary pores and the inter-granular dissolved and intra-granular dissolved pores of feldspar, debris and carbonate cements. Physical properties are mainly controlled by carbonate cementation and dissolution, and distribution of abnormally high fluid pressure. The evolution of porosity parameters shows that primary porosity is 36.75%, the porosity loss rate is 40.49% during the process of mechanic compaction, the porosity loss rate is 37.25% during the process of cementation and metasomasis, and the porosity increase rate is 17.88% during the process of dissolution. The proportion of primary porosity is 55.03%, and that of the secondary porosity is 44.97%. The error rate in the quantitative study of porosity is 0.96%, and the main influencing factor of the error rate is sorting coefficient of detrital rock (S0). Key words: deep reservoir, Dongpu Sag, Wendong Oilfield, porosity evolution model, secondary porehttp://www.sciencedirect.com/science/article/pii/S1876380411600554 |
| spellingShingle | Ruifei Wang Pingping Shen Liangjin Zhao Diagenesis of deep sandstone reservoirs and a quantitative model of porosity evolution: Taking the third member of Shahejie Formation in the Wendong Oilfield, Dongpu Sag, as an example Petroleum Exploration and Development |
| title | Diagenesis of deep sandstone reservoirs and a quantitative model of porosity evolution: Taking the third member of Shahejie Formation in the Wendong Oilfield, Dongpu Sag, as an example |
| title_full | Diagenesis of deep sandstone reservoirs and a quantitative model of porosity evolution: Taking the third member of Shahejie Formation in the Wendong Oilfield, Dongpu Sag, as an example |
| title_fullStr | Diagenesis of deep sandstone reservoirs and a quantitative model of porosity evolution: Taking the third member of Shahejie Formation in the Wendong Oilfield, Dongpu Sag, as an example |
| title_full_unstemmed | Diagenesis of deep sandstone reservoirs and a quantitative model of porosity evolution: Taking the third member of Shahejie Formation in the Wendong Oilfield, Dongpu Sag, as an example |
| title_short | Diagenesis of deep sandstone reservoirs and a quantitative model of porosity evolution: Taking the third member of Shahejie Formation in the Wendong Oilfield, Dongpu Sag, as an example |
| title_sort | diagenesis of deep sandstone reservoirs and a quantitative model of porosity evolution taking the third member of shahejie formation in the wendong oilfield dongpu sag as an example |
| url | http://www.sciencedirect.com/science/article/pii/S1876380411600554 |
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