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Time-shifting-logging-based method for building initial model with seismic facies constraint

A technology of time-lapse logging and initial model, which is applied in the fields of seismology, seismology, and seismic signal processing for logging records, and can solve the problem of weak lateral prediction ability of logging data and inaccurate depositional superposition Discrimination, multi-solution problems, etc., to achieve the effect of solving the problem of inconsistency between logging acquisition time and seismic acquisition time

Inactive Publication Date: 2016-05-25
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology

Until now, the sedimentary distribution of the whole area is obtained by interpolation using well logging data. Due to the complexity of the underground structure and the weak lateral prediction ability of the logging data, multi-solutions are prone to occur in the interpolation process, and the superimposition of sedimentation cannot be determined. very accurate judgment

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  • Time-shifting-logging-based method for building initial model with seismic facies constraint
  • Time-shifting-logging-based method for building initial model with seismic facies constraint
  • Time-shifting-logging-based method for building initial model with seismic facies constraint

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[0038] The technical solutions in the examples of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the examples of the present invention. Obviously, the described examples are only some examples of the present invention, not all examples. Based on the examples in the present invention, all other examples obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0039] Such as figure 1 As shown, the present invention provides a method for constructing an initial model based on seismic phase constraints of time-lapse logging, which includes the following steps:

[0040] 1) Well-seismic calibration is performed by using interpreted horizons and data after time-lapse logging, and the seismic spatial relationship is established in combination with seismic data, which not only establishes the relationship between the seismic trace at ...

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Abstract

The invention relates to a time-shifting-logging-based method for building an initial model with a seismic facies constraint. The method comprises: well seismic calibration is carried out by using an interpreting layer and data after time-shifting logging, a seismic spatial relation is established by combining seismic data, and a consistency analysis is carried out on a well seismic calibration result and the seismic spatial relation; a seismic data isochronal stratigraphic frame is established by using the interpreting layer and data after time-shifting logging, wherein the seismic data isochronal stratigraphic frame is established by carrying out guiding and tracking by using an inclination angle obtained by seismic calculation and subdividing a small layer; and on the constraint of the isochronal stratigraphic frame, interpolation is carried out by using the calibrated logging data and the seismic spatial relation to obtain an initial model. According to the invention, deposition distribution cab be reflected well and the basis can be established well for better and accurate inversion.

Description

technical field [0001] The invention relates to the fields of well logging and seismic comprehensive research of oilfield development, in particular to a method for constructing an initial model based on seismic phase constraints of time-lapse logging. Background technique [0002] The key to the inversion is the establishment of the constraint model, the selection of wavelets, the selection of constraints and quality control parameters. In addition to establishing a reasonable constraint model and extracting reasonable wavelets, in the inversion process, the elastic impedance trend hard constraints of multiple wells, the control of the geological structure frame model and the soft constraints of seismic data are added. The soft constraints mainly control For lateral changes, the hard constraints of logging data control the vertical changes. The model-based seismic inversion method reasonably supplements high-frequency information and complete low-frequency components in we...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/40
CPCG01V1/282G01V1/40
Inventor 范廷恩胡光义张会来黄旭日张显文高云峰田楠宋海渤张晶玉卜范青樊鹏军井涌泉周建楠
Owner CHINA NAT OFFSHORE OIL CORP
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