Prediction of porosity and gas saturation for deep‑buried sandstone reservoirs from seismic data using an improved rock‑physics model

• Autorzy: Yaneng Luo , Handong Huang , Morten Jakobsen , Yadi Yang , Jinwei Zhang , Yanjie Cai

Identyfikatory

DOI

10.1007/s11600-019-00274-6

• Języki publikacji: EN

Abstrakty

EN

In recent years, many important discoveries have been made in global deep oil and gas exploration, which indicates that deep exploration has gradually become one of the most important areas in current and future hydrocarbon exploration. However, the prediction of deep reservoirs is very challenging due to their low porosity and complex pore structure characteristics caused by the burial depth and diagenesis. Rock physics provides a link between the geologic reservoir parameters and seismic elastic properties and has evolved to become a key tool of quantitative seismic interpretation. Based on the mineral component and pore structure analysis of studied rocks, we propose an improved rock-physics model by introducing a third feldspar-related pore for deep-buried sandstone reservoirs to the traditional Xu–White model. This modelling process consists of three steps: first, rock matrix modelling using time-average equations; second, dry rock modelling using a multipore analytical approximation; and third, fluid-saturated rock modelling using a patchy distribution. It has been used in total porosity estimation, S-wave velocity prediction and rock-physics template establishment. The applicability of the improved rock-physics model is verified by a theoretical quartz-water model test and a real data total porosity estimation compared with the traditional Xu–White model and the density method. Then, a rock-physics template is generated by the improved rock-physics model for porosity and gas saturation prediction using seismic data. This template is carefully calibrated and validated by well-log data at both the well-log scale and seismic scale. Finally, the feasibility of the established rock-physics template for porosity and gas saturation prediction is validated by a deep-buried sandstone reservoir application in the East China Sea.

Słowa kluczowe

EN

deep exploration; gas-bearing sandstone; pore structure; rock-physics modelling; seismic prediction

PL

eksploracja głęboka; piaskowiec gazonośny; struktura porów; modelowanie fizyki skał; prognozy sejsmiczne

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2019
• Tom: Vol. 67, no. 2
• Strony: 557--575
• Opis fizyczny: Bibliogr. 55 poz.

Twórcy

autor

Yaneng Luo

• State Key Laboratory of Petroleum Resource and Prospecting, Unconventional Natural Gas Research Institute, China University of Petroleum, Beijing 102249, China

autor

Handong Huang

• State Key Laboratory of Petroleum Resource and Prospecting, Unconventional Natural Gas Research Institute, China University of Petroleum, Beijing 102249, China

autor

Morten Jakobsen

• Department of Earth Science, University of Bergen, 5020 Bergen, Norway

autor

Yadi Yang

• Research Institute of Petroleum Exploration and Development, PetroChina Company Limited, Beijing 100083, China

autor

Jinwei Zhang

• College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, China

autor

Yanjie Cai

• Gudao Oil Production Plant of Shengli Oilfield, China Petrochemical Corporation, Dongying 257231, Shandong, China

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).