Abstract
Bozhong B gas field is an Archean burial-hill fractured gas reservoir. The burial-hill in this area experienced multi-stage tectonic movement and multi-scale fractures were coupled in the reservoir. The conventional large-scale fracture prediction based on post-stack seismic data and the meso-scale fracture prediction based on prestack anisotropy analysis are both single, which makes it difficult to accurately predict the spatial distribution pattern of underground multi-scale fractures. In this study, (1) multiple pre-stack and post-stack methods were used to predict fractures at different scales, and a comprehensive fracture density field was obtained by random forest fusion. (2) The power law distribution relationship between fracture length and fracture number was defined based on seismic logging data statistics, so as to predict the development frequency of fracture scale at all scales in B gas field; (3) By extracting post-stack fault attributes and pre-stack prediction vectors, combined with FMI logging correction, a guidance field for fracture development direction was established. (4) Combined with fracture density field, fracture length frequency and fracture direction guidance field, multi-scale fracture distribution prediction of B gas field is realized. A set of technical flow for multi-scale fracture prediction of buried hill is formed, which provides technical support for the development of buried hill fractured gas field, effectively guides well location deployment, and has exploratory significance for subsequent multi-scale fracture seismic prediction research.
Copyright 2023, IFEDC Organizing Committee.
This paper was prepared for presentation at the 2023 International Field Exploration and Development Conference in Wuhan, China, 20–22 September 2023.
This paper was selected for presentation by the IFEDC Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the IFEDC Technical Team and are subject to correction by the author(s). The material does not necessarily reflect any position of the IFEDC Technical Committee its members. Papers presented at the Conference are subject to publication review by Professional Team of IFEDC Technical Committee. Electronic reproduction, distribution, or storage of any part of this paper for commercial purposes without the written consent of IFEDC Organizing Committee is prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuous acknowledgment of IFEDC. Contact email: paper@ifedc.org.
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The authors would like to express gratitudes to all experts from CRI also the IFEDC.
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Fan, Pj., Du, X., Wang, Zj. (2024). Seismic Prediction of Multiscale Fracture in Archaean Buried Hill Gas Field. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2023. IFEDC 2023. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-97-0468-2_49
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DOI: https://doi.org/10.1007/978-981-97-0468-2_49
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