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Delta sand body internal structure analysis method based on overlapped lobes

A technology of internal structure and analysis method, applied in earthwork drilling, borehole/well components, etc., can solve problems such as difficult to characterize internal structure characteristics

Inactive Publication Date: 2014-09-03
YANGTZE UNIVERSITY
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Problems solved by technology

The deltas based on superimposed lobe bodies will be based on distributary channel sand bodies, and the results obtained by distributary channel sand bodies will inevitably have great differences from their real structures, making it difficult to characterize their internal structural characteristics

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  • Delta sand body internal structure analysis method based on overlapped lobes
  • Delta sand body internal structure analysis method based on overlapped lobes
  • Delta sand body internal structure analysis method based on overlapped lobes

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments, but these embodiments should not be construed as limiting the present invention.

[0021] The present invention will be further described below by specific embodiment:

[0022] Xingliuzhong of Daqing Oilfield is located in the Xingshugang area in the central south of Changtan, Daqing. There are three sets of oil-bearing strata of Sa, Pu and Gao in the block, among which the P1 (the first group of Pu) oil group has thick sand bodies and distributed Wide, good physical properties, the total amount of resources and huge potential. Sand bodies are widely distributed in the entire Xingshugang area, with an overall thickness of more than 30 meters and a single layer thickness of 3-8 meters. They are typical thick-bedded sand bodies. If the previous research results are used, the oil layer is a typical large-scale fluvial delta front sand body, and th...

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Abstract

The invention discloses a delta sand body internal structure analysis method based on overlapped lobes. The method includes the following steps that firstly, data are collected; secondly, a top interface and a bottom interface of a layer are determined; thirdly, the interface characteristics of the lobes are determined by analyzing the lithological and electrical characteristics of lobe boundaries, and the lobe boundaries are determined; fourthly, reservoir internal structure characteristics are recognized through bottom leveling, and the mutual relation between the lobes is preliminarily analyzed; fifthly, based on recognition of the lobes, the lobes are divided into a composite lobe level and a single lobe level, the corresponding relation between the lobes is analyzed, the relation between the lobes is determined, comparison analysis is conducted on the distribution characteristics of the lobes on a section, and interwell distribution of the lobes is determined; sixthly, the plane distribution range and the distribution shape of the lobes are determined; seventhly, the reservoir structure is verified. By the adoption of the method, a delta sand body internal structure is accurately described, reliability and practicality are high, a new thought is provided for understanding of anisotropy of reservoirs, and the method can be widely applied to the technical field of exploitation and development of oil and gas.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to a method for analyzing the internal structure of delta sand bodies based on overlapping lobe bodies. Background technique [0002] The internal structure of the reservoir is the main cause of the difference in water flooding and the formation of remaining oil. Therefore, it is an important task in the development and adjustment of the main oil reservoirs to recognize the reservoir structure and the geological factors controlling the remaining oil, which has attracted widespread attention. [0003] The understanding of the internal structure of sandbodies originated from fluvial deposits. Field outcrop anatomy and modern sedimentary investigations in the 1980s and 1990s have formed a set of good anatomical ideas and structural models, laying a solid foundation for underground reservoir anatomy. After entering the new century, due to the need for sta...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00
Inventor 尹太举张昌民
Owner YANGTZE UNIVERSITY
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