Identification of Diagenetic Facies Based on Diagenetic Process: An Example from Paleogene Lake Sediment Sandstone in Bozhong X Oilfield
Volume 7, Issue 4, August 2018, Pages: 158-165
Received: Jun. 3, 2018;
Accepted: Jun. 19, 2018;
Published: Jul. 7, 2018
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Qian Wendao, School of Geoscience of Yangtze University, Wuhan, China
Yin Taiju, School of Geoscience of Yangtze University, Wuhan, China
Sun Shaochuan, Zhongyuan Oilfield of Sinopec, Puyang, China
Zhang Changmin, School of Geoscience of Yangtze University, Wuhan, China
Hou Guowei, Shanghai Branch of CNOOC Ltd., Shanghai, China
He Miao, Shanghai Branch of CNOOC Ltd., Shanghai, China
Xia Min, School of Geoscience of Yangtze University, Wuhan, China
Based on diagenetic evolution, reservoir diagenetic facies evolution was restored in burial history through quantitatively calculating the original porosity reconstructed by compaction, cementation and dissolution using core measurement data. The essence of this method was illustrated and its effectiveness was demonstrated using Paleogene lake sediment sandstone in Bozhong X oilfield, Bohai Bay Basin, China. Because diagenetic field changes as the structure depth increases or decreases and acts on deposition, diagenetic facies can be significantly different in different geological period. The Ed1 reservoir has experienced such an evolutionary process of W-Com_W-Cla-C_M-Car-C to M-Com_M-Clay-C_W-Qua-C_W-Fel-D_W-Car-D to M-Com_M-Cla-C_W-Qua-C_W-Fel-D_W-Car-D, while the Ed2 , the Ed3 and the Es1 are W-Com_W-Cla-C to M-Com_M-Cla-C-S-Com_S-Clay-C_W-Qua-C_W-Fel-D to S-Com_S-Cla-C_W-Qua-C_M-Fel-D, M-Com_W-Cla-C_W-Qua-C_W-Fel-D to M-Com_M-Cla-C_W-Qua-C_W-Fel-D to S-Com_M-Clay-C_W-Qua-C_S-Fel-D to S-Com_S-Clay-C_M-Qua-C_S-Fel-D and M-Com_W-Cla-C_W-Car-C to M-Com_M-Cla-C_W-Car-C_M-Fel-D_W-Car-D to M-Com_M-Clay-C_S-Fel-D_M-Car-D to S-Com_M-Cla-C _S-Fel-D_ M-Car-D respectively. Through this study, the reason for the dynamic change of sand body in the diagenetic field and the anisotropy of the reservoir are revealed.
Identification of Diagenetic Facies Based on Diagenetic Process: An Example from Paleogene Lake Sediment Sandstone in Bozhong X Oilfield, Earth Sciences.
Vol. 7, No. 4,
2018, pp. 158-165.
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