Description method of turbidite reservoir with high sandstone-stratum ratio

A turbidite and reservoir technology, applied in seismology, geophysical measurement, seismic signal processing, etc., can solve the problems of rapid lithofacies changes, difficult to identify, difficult to understand the distribution of sand bodies and sedimentary characteristics, etc. Accurate growth and distribution characteristics are achieved

Active Publication Date: 2018-03-23
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, the turbidite sediments developed in continental lake basins are complex in development, lithofacies change rapidly, and there are overlapping phenomena.
With the deepening of exploration, large-scale turbidite bodies that are easily identifiable seismically have been basically recognized; some turbidites that overlap each other, have thin mudstone barriers between adjacent sand bodies, and relatively high sandy ground are often not visible on seismic sections. It is easy to identify, but it is difficult to find out the distribution shape and sedimentary characteristics of sandbodies directly from the interpretation of seismic data and conventional inversion results
The previous geophysical techniques (such as conventional seismic description, attribute extraction, etc.) used to find large-scale and easily identifiable seismic traps are no longer suitable for increasingly complex types of turbidite lithologic traps, which affects the overall exploration deployment. and reserve upgrade evaluation

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  • Description method of turbidite reservoir with high sandstone-stratum ratio
  • Description method of turbidite reservoir with high sandstone-stratum ratio
  • Description method of turbidite reservoir with high sandstone-stratum ratio

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Embodiment Construction

[0021] In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are listed below in conjunction with the drawings, which are described in detail as follows.

[0022] Such as figure 1 As shown, figure 1 It is a flowchart of the method for describing the high sand ratio turbidite reservoir of the present invention.

[0023] Step 101: Fine synthetic record calibration to clarify the correspondence between lithology and seismic reflection characteristics. In the seismic workstation, through fine synthetic record calibration, the corresponding relationship between lithology and seismic reflection characteristics is clarified, and the descriptive probability of high sandy turbidite reservoirs on conventional seismic sections is analyzed. In an embodiment, the three-dimensional seismic data in the study area has a narrow frequency band, low main frequency, and low signal-to-noise ratio in the target zone. At...

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Abstract

The invention provides a description method of a turbidite reservoir with a high sandstone-stratum ratio. The method comprises steps of step 1, carrying out fine synthetic recording calibration and explicating a corresponding relation between lithological characteristics and seismic reflection characteristics; step 2, carrying out multi-well crossploting analysis and optimally selecting a well measuring curve capable of effectively distinguishing sand shale; step 3, by use of the effective well measuring curve, carrying out reservoir reversion under waveform indication; step 3, based on the well, carrying out mutual comparison and careful analysis on the well participating in the reversion and determining reversion chromatography blocks; and step 5, carrying out comparison verification onreal drilling sand bodies of wells which participate in and fail to participate in the reversion with well side reversion channels, and carrying out accurate tracking description on the sand bodies byusing the reversion and drilling data. According to the invention, sand body shapes matching with the actual depositional characteristics can be accurately and quickly described; and growth and distribution characteristics of the turbidite can be quite precisely reflected.

Description

Technical field [0001] The invention relates to the technical field of petroleum exploration, in particular to a method for describing a high sand ratio turbidite reservoir. Background technique [0002] For high-sandy turbidite reservoirs, there is a lack of systematic use of seismic data to describe the research methods as a whole, there are "missing" reservoirs, and the description is ambiguity. It is a high-sandy land formed for accurate and fine description of the reservoir. Than turbidite reservoir description method. [0003] In recent years, Shengli Oilfield turbidite exploration has achieved great success, and turbidite reservoirs have become an important position for increasing reserves in the near future. However, the turbidite sedimentary bodies developed in the continental lake basin are complicated, the lithofacies change rapidly, and there is a phenomenon of overlapping each other. With the deepening of exploration, the large-scale turbidites that are easy to ident...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/6163G01V2210/6167G01V2210/6169G01V2210/624G01V2210/64
Inventor 徐昊清王永诗马立驰郭玉新景安语孙超张明华辛也王婵许晓凤秦永霞王莉庄梅孙锡文毕俊凤王亚琳熊伟杨贵丽
Owner CHINA PETROLEUM & CHEM CORP
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