Whole-area multi-well well logging curve standardization method and device based on correlation well

Abstract

The embodiment of the invention provides a whole-area multi-well well logging curve standardization method and device based on a correlation well. The method comprises the steps that an initial standard well is determined, and a local standard layer which is drilled in the initial standard well is determined at a target layer target of a research area; all wells for drilling of the local standardlayer with the initial standard well are determined; a peak value of a histogram of a well logging curve to be standardized, at the local standard layer, of the initial standard well and difference values among the peak values of histograms of well logging curves to be standardized, at the local standard layer, of all the wells are determined; standardization correction values of all the wells aredetermined according to the difference values, and the well logging curves to be standardized, at the local standard layer, of all the wells are subjected to standardization correction based on the standardization correction values; a well is selected from all the wells and used as the correlation well of the initial standard well, the correlation well is used as a new initial standard well, andthe unstandardized wells in the research area are standardized. According to the whole-area multi-well well logging curve standardization method and device based on the correlation well, standardization of the well logging curves of the whole area can be completed under the situation of no stable mark layer.

Description

technical field [0001] The present application relates to the technical field of geophysical well logging, in particular to a method and device for standardizing multi-well logging curves in the whole area based on associated wells. Background technique [0002] In the exploration and development process of old oilfields, well data are abundant, but the logging time span is long, and the logging data will be affected by factors such as acquisition time, instrument type, and human operation, and there will be errors mainly due to calibration factors. Therefore, standardization is generally required to make the well curves in different periods reach a unified standard scale, which is also the key to realize the processing, interpretation and evaluation from single well to multi-well. [0003] The current standardization of curves can be divided into three steps: the first is to select key wells, which is also one of the keys to standardization; the second is to select standard...

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Problems solved by technology

[0004] However, when there is no stable marker layer in the study area, the traditional method is to select standard layers in different regions and standardize them in different regions, but this will reduce the accuracy and reliability of multi-well logging reservoirs and fluids in the whole area.

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