Geophysical prediction method for unconventional oil and gas favorable area

A technology of geophysics and prediction methods, applied in the field of seismic exploration, can solve problems such as multi-solution uncertainty and achieve high reliability.

Pending Publication Date: 2021-02-12
DAQING OILFIELD CO LTD +1
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Problems solved by technology

[0003] The present invention aims to overcome the problems of multiple solutions and uncertainties in the prediction results of favorable areas for shale oil exploration that are dominated by geological research in the background technology, and provide a geophysical prediction method for favorable areas of unconventional oil and gas

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  • Geophysical prediction method for unconventional oil and gas favorable area
  • Geophysical prediction method for unconventional oil and gas favorable area
  • Geophysical prediction method for unconventional oil and gas favorable area

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Embodiment Construction

[0024]Combine belowfigure 1 The process of the quality control method of the present invention describes the implementation process of a geophysical prediction method for unconventional oil and gas favorable areas of the present invention. The method includes the following steps:

[0025]Step (1) Drilling and coring and logging of the whole well section: According to the large-scale structure map and shale layer thickness map of the study area, select the scientific exploration well location in the shale thickness development area, and take the Qingshankou of Gulong Sag in the northern Songliao Basin Take the group of shale as an example, the key exploration well should be selected as far as possible where the shale thickness is the largest, and the most complete sedimentary strata; during the drilling process, the shale layer is sealed and coring throughout the well, and different types and thicknesses of sandstone interlayers are selected after the core description. A number of sampl...

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Abstract

The invention provides a geophysical prediction method for an unconventional oil and gas favorable area, which is used for solving the problems of multiplicity and uncertainty of an existing shale oilexploration favorable area prediction result dominated by geological research. The method comprises the steps of (1) drilling and coring, and logging in the whole well section; (2) carrying out indoor geological test and geochemical measurement; (3) carrying out acoustic laboratory measurement; (4) establishing a rock physical model and collecting VSP; (5) processing 'three highs' seismic data under the guidance and constraint of VSP and forward modeling results; (6) performing geophysical forward modeling, and performing inversion prediction on five parameters including TOC, Ro, shale porosity, pore pressure and shale brittleness; and (7) comprehensively analyzing and comparing to determine a shale oil exploration favorable area. The method is mainly based on geophysical means, can predict five indexes of the shale oil exploration favorable area in a targeted manner, has the progress from qualitative to quantitative, and has a reference significance for unconventional oil and gas (shale oil) exploration and related scientific research.

Description

Technical field[0001]The invention relates to the technical field of seismic exploration, in particular to a geophysical prediction method for unconventional oil and gas favorable areas.Background technique[0002]The exploration of unconventional oil and gas resources is the development direction and inevitable trend of oil and gas field enterprises. Taking Daqing Oilfield as an example, good exploration results have been achieved in deep tight glutenite natural gas exploration and mudstone oil exploration. Shale oil exploration is the future increase in reserves and production of old oilfields. However, the shale oil accumulation mechanism, enrichment rules, and main controlling factors in the Songliao Basin are still unclear. It is difficult to carry out prediction research on favorable areas for shale oil exploration dominated by geological research, and there are many influencing factors. The prediction results There are multiple solutions and uncertainties.Summary of the inventi...

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Application Information

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IPC IPC(8): G01V1/50
CPCG01V1/50G01V2210/6169G01V2210/624
Inventor 包燚陈树民李奎周王成裴江云张芝铭于占清卢广达
Owner DAQING OILFIELD CO LTD
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