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Seismic sedimentology quantitative characterization method of braided river delta reservoir in horizontal well area

A technology for quantitative characterization and horizontal well area, which is applied in the quantitative characterization of braided river delta reservoirs and the seismic sedimentology quantitative characterization of braided river delta reservoirs in horizontal well areas, which can solve the problem of difficult quantitative characterization of thin sand bodies. To achieve the effect of improving accuracy and simple operation

Inactive Publication Date: 2019-07-30
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0007] The present invention provides a reservoir quantitative characterization method and industrialization process combining horizontal wells and seismic sedimentology, provides a new method and operation process for the seismic sedimentology research in the horizontal well area, and effectively solves the problem of thin braided river deltas. Quantitative characterization of layered sand bodies is difficult

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Embodiment

[0040] The MPE-3 block in Venezuela is located in the Orinoco heavy oil belt, the heavy oil enrichment area with the largest geological reserves and the lowest development degree in the world. It is a braided river delta heavy oil reservoir mainly developed by horizontal wells. The reservoir structure is complex. The shapes and boundaries of different genetic types of sand bodies are unclear, and traditional sedimentary microfacies and sand body characterization based on vertical wells have been difficult to meet the requirements of horizontal well development. The method of the invention is used to quantitatively characterize the sand bodies in the research area.

[0041] Firstly, load the seismic data. In this study, the Geoscope software developed by Beijing Noxda Petroleum Technology Co., Ltd. was used to load the post-stack seismic data after amplitude preservation processing into the software.

[0042] The second step is to analyze the quality of seismic data in the stud...

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Abstract

The invention discloses a seismic sedimentology quantitative characterization method of braided river delta reservoirs in horizontal well area, and relates to the field of oil and gas development geology. The seismic sedimentology quantitative characterization method comprises the following steps that (1) the post-stack seismic data volume is loaded; (2) the seismic data quality is analyzed; (3) 90-degree phase shifting is conducted; (4) the average sand thickness is counted; (5) the seismic data main frequency f matched with the average sand thickness h is determined; (6) seismic data volumeCf with the main frequency being f is made by frequency-division analysis of the 90 degree phase seismic data volume; (7) frequency-division seismic slices are made by using the frequency-division seismic data volume Cf; (8) petrophysical analysis is conducted; (9) well logging curves of the horizontal well section are projected to the frequency-division seismic slices; (10) the seismic slices arecalibrated by using horizontal well information for fine geological interpretation; and (11) a quantitative sedimentary knowledge base of sand bodies with different sedimentary microfacies types is established. According to the seismic sedimentology quantitative characterization method, operation is easy, an efficient industrialized method is provided for seismic sedimentology characterization ofsand bodies in the horizontal well area, and the prediction accuracy of the sand bodies can be improved.

Description

technical field [0001] The present invention relates to the geological field of oil and gas development, in particular to a quantitative characterization method for reservoirs combining seismic sedimentology and horizontal wells, a quantitative characterization method for seismic sedimentology of braided river delta reservoirs in horizontal well areas, and realizes horizontal well patterns Quantitative characterization of braided river delta reservoirs under conditions. Background technique [0002] Braided river delta reservoirs are excellent reservoirs in oil and gas geological research and play an important role in oil and gas geological development. The reservoir structure of braided river delta is complex, and the shapes and boundaries of sand bodies of different genetic types are not clearly understood. It is difficult to accurately describe the sedimentary complexity of braided river delta reservoirs by traditional reservoir characterization methods only using vertica...

Claims

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Application Information

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IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/282G01V1/30
Inventor 刘书亭张宪国任丽华林芳林承焰董春梅杜凯吴啸啸
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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