Unconformity stratum denudation amount recovery method

A technology of stratum erosion and erosion volume, which is applied in geophysical surveying, seismology, measuring devices, etc., can solve the problems of low accuracy of erosion volume recovery and scope of application, and achieve the effects of wide applicability, high precision, and strong rationality

Inactive Publication Date: 2017-02-15
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of low accuracy and limited scope of application in the prior art, and provide a method for recovering the erosion volume of unconformity formations

Method used

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  • Unconformity stratum denudation amount recovery method
  • Unconformity stratum denudation amount recovery method
  • Unconformity stratum denudation amount recovery method

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Embodiment Construction

[0037] The present invention will be described in further detail below in conjunction with the restoration examples and accompanying drawings of the top surface denudation amount of the Yingen Formation in the western sub-sag of the Chagan Sag in the Yin'e Basin. figure 1 As can be seen from the flow chart of the technical solution of the present invention, the specific steps of the present invention are as follows:

[0038] 1 Using the mud logging data and core data of 62 wells in the Yingen Formation in the western sub-sag of the Chagan Sag shown in Table 1, according to figure 2 Geological characteristics and identification of single well on the unconformity surface of Well Xiang7 in the western sub-sag of Chagan Sag shown, and image 3 The seismic response characteristics of the unconformity surface at the top of the Yingen Formation in the ILN1680 seismic section of the Chagan Sag are shown, and the distribution range of the unconformity surface of the Yingen Formation i...

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Abstract

The invention relates to an unconformity stratum denudation amount recovery method and belongs to the field of geological structure evolution research and oil gas resource quantitative evaluation. According to the invention, by use of sound wave time difference data corresponding to a mudstone well segment of each single well in a target area with a denudation amount, logarithmic relations between unconformity upper and lower stratum mudstone well segment embedment depths and sound wave time differences are established, compacting features of old strata below an unconformity before denudation are determined, compacting trends of stratum mudstones below the unconformity are extended upwards to a paleo-ground surface, and thus a stratum denudation amount at the unconformity is determined. According to the invention, the recovered denudation amount has a good positive correlation relation with paleotopography, the recovery precision is high, the rationality is high, and therefore, the applicability is wide.

Description

technical field [0001] The invention relates to a method for recovering the denudation amount of an unconformity surface formation, which belongs to the field of geological structure evolution research and quantitative evaluation of oil and gas resources. Background technique [0002] Formation denudation is a common phenomenon in multi-stage sedimentary basins, and it has a very important impact on the generation, migration and accumulation of oil and gas in sedimentary basins. [0003] The main methods of conventional stratum denudation restoration: (1) The vitrinite reflectance method is a method to recover the stratum denudation thickness by using the vitrinite reflectance (Ro) in a linear relationship with the depth. The abundance of the data obtained by means is relatively low, which affects the accuracy of the method’s recovery. In addition, it is particularly difficult to recover the denudation volume in superimposed, composite, and late-stage complex evolution basin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/50
CPCG01V1/50G01V2210/6169
Inventor 杨玉平国殿斌谈玉明赵其磊李建国王亚明唐果王鹏宇
Owner CHINA PETROLEUM & CHEM CORP
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