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Method for interpreting seismic horizon to sedimentary unit in dense well network area

A technique for sedimentary units and seismic layers, which is applied in seismology, seismology, seismic signal processing, etc. for well logging records. It can solve the problems of sedimentary unit reservoir prediction, low efficiency, inability to obtain seismic data, and heavy horizon calibration workload. and other issues to achieve the effect of improving work efficiency and reducing labor intensity

Pending Publication Date: 2020-07-14
DAQING OILFIELD CO LTD +1
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Problems solved by technology

[0006] The present invention aims to overcome the problem that the existing seismic geological horizon calibration method in the background technology has a large workload and low efficiency of horizon calibration, and seismic data cannot predict reservoirs for sedimentary units, and provides a seismic horizon interpretation for dense well network areas approach to deposition unit

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  • Method for interpreting seismic horizon to sedimentary unit in dense well network area
  • Method for interpreting seismic horizon to sedimentary unit in dense well network area
  • Method for interpreting seismic horizon to sedimentary unit in dense well network area

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Embodiment 1

[0035] Taking the isochronous framework PI and GI of the oil layer group level in the BRX block of Changyuan Oilfield as an example, the method of interpreting the seismic horizon to the sedimentary unit in the dense well pattern area of ​​the present invention is specifically explained

[0036] Such as figure 2 As shown, taking the 10 wells in the work area as an example, 4 wells have sound wave and density curves, and synthetic records can be made; the other 6 wells have no sound wave and density curves, so synthetic records cannot be made.

[0037] 1. With reference to the time-domain data of 4 wells for synthetic recording (Table 1 is the layered data of oil layer groups), the seismic reflection events corresponding to PI and GI on the top surface of oil layer groups can be tracked in the whole area (such as image 3 shown), under its control, the time values ​​of the other 6 wells can be read out on the seismic section.

[0038] The overall stratigraphic thickness of PI...

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Abstract

The invention relates to a method for interpreting a seismic horizon to a sedimentary unit in a dense well network area. The problems that an existing seismic geological horizon calibration method islarge in horizon calibration workload and low in efficiency, and seismic data cannot conduct reservoir prediction on a sedimentary unit are solved. The method comprises the following steps of 1) acquiring data: acquiring a three-dimensional seismic data volume acquired outdoors and well point depth domain hierarchical data measured by using a logging instrument, 2) performing three-dimensional seismic data volume oil layer group level isochronous stratigraphic framework interpretation by applying an artificial interpretation method, 3) secondly, interpreting a sedimentary unit-level isochronous stratigraphic framework of the seismic data volume, and 4) finally, under the control of the seismic data volume sedimentary unit-level isochronous stratigraphic framework, effectively extracting the seismic attribute reservoir prediction result of each sedimentary unit. According to the method, the time domain isochronous stratigraphic framework is established by tracking the seismic horizon ofthe top and the bottom of the oil layer group, so that the reservoir prediction work of seismic data on each sedimentary unit is realized.

Description

Technical field: [0001] The invention relates to the technical field of petroleum exploitation, in particular to a method for interpreting seismic horizons in dense well pattern areas to sedimentary units. Background technique: [0002] Seismic data is collected in the time domain, while geological research results are data in the depth domain. Calibrating geological results to the time domain is the basis of seismic interpretation. Horizontal calibration is the process of determining the affiliation of the interpreted seismic reflection target layer through artificially synthesized records, and then extending the geological meaning revealed by logging and drilling data to the seismic profile through the well. The relationship between geological horizons and seismic reflection characteristics can be directly established through horizon calibration, and a bridge leading to seismic interpretation can be built for geological results. [0003] At present, the most commonly use...

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Application Information

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IPC IPC(8): G01V1/50
CPCG01V1/50G01V2210/6169G01V2210/624
Inventor 周华建李艳丽齐金成
Owner DAQING OILFIELD CO LTD
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