Multi parameter logging evaluation of tight sandstone reservoir based on petrophysical experiment

• Autorzy: Li Haitao , Deng Shaogui , Xu Feng , Niu Yunfeng , Hu Xufei

Identyfikatory

DOI

10.1007/s11600-021-00542-4

• Języki publikacji: EN

Abstrakty

EN

Acoustic, resistivity and nuclear magnetic resonance (NMR) logging are important means of reservoir evaluation. In this paper, the information of pore structure, such as the aspect ratio and the shape, is obtained by rock physical experiments like constant velocity mercury injection and casting thin section. Taking pore structure information as a link, the theoretical relations among acoustic-NMR, acoustic-resistivity and resistivity-NMR of rocks are studied, respectively, based on the diferential equivalent model and fractal theory, and the theoretical derivation results are verifed by AE acoustic emission experiment, rock resistivity experiment and NMR experiment. It is found that there is a power function relationship between the P/S wave velocity and the geometric mean value of NMR T2. Moreover, there are also power function relationships between the slowness of P/S wave and resistivity, and between the value of NMR T2 and the increase rate of resistance. Based on the above relationship, the gas reservoir can be identifed by acoustic-resistivity-NMR multi-parameters in well G of the study area. Compared with the conventional P/S velocity ratio and P-wave slowness intersection method, the separa tion efect of gas and water is more obvious.

Słowa kluczowe

EN

petrophysical experiment; pore structure; acoustic-resistivity-NMR parameters relationships; gas identification

PL

eksperyment petrofizyczny; struktura porów

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2021
• Tom: Vol. 69, no. 2
• Strony: 429--440
• Opis fizyczny: Bibliogr. 36 poz.

Twórcy

autor

Li Haitao

• School of Geosciences, China University of Petroleum, Qingdao 266580, Shandong, China

autor

Deng Shaogui

• School of Geosciences, China University of Petroleum, Qingdao 266580, Shandong, China

autor

Xu Feng

• Development of Jidong Oilfeld, Research Institute of Petroleum Exploration, Tangshan 063000, China

autor

Niu Yunfeng

• Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China

autor

Hu Xufei

• Faculty of Petroleum, China University of Petroleum-Beijing At Karamay, Karamay 834000, China

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