Method for predicting width of underwater distributary channels of delta front

A prediction method and delta technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems that cannot be used as calculation formulas, and achieve the effect of accurate width

Inactive Publication Date: 2017-05-31
CHINA PETROLEUM & CHEM CORP +1
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This method is based on the statistics of current rivers, and has certain reference value ...

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  • Method for predicting width of underwater distributary channels of delta front
  • Method for predicting width of underwater distributary channels of delta front
  • Method for predicting width of underwater distributary channels of delta front

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[0020] In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments are listed below and shown in the accompanying drawings in detail as follows.

[0021] In step 101, statically identify underwater distributary channel microfacies according to the sedimentary microfacies diagram of the sublayer. In the process of drawing the sedimentary microfacies plane map of sub-layers, it is necessary to determine the boundary of the underwater distributary channel by finely comparing the electrical characteristics of the channel sand bodies between adjacent wells.

[0022] The determination of the boundary of the underwater distributary channel can be divided into the following two situations for discussion: 1) The electrical characteristics of the two adjacent wells gradually change from box-shaped to bell-shaped or wide-toothed, and the wells with wide-toothed 2) The typical characteristics of two adjacent...

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Abstract

The invention provides a method for predicting the width of underwater distributary channels of a delta front. The method comprises the steps that 1, static recognition is conducted on an underwater distributary channel microfacies according to a small-layer depositional microfacies picture; 2, dynamic analysis is conducted on a typical well group, and single-stage channels are dynamically divided; 3, the recognized underwater distributary channels of the typical well group are finely depicted through a logging phase and rock core information, the finely depicted single-stage underwater distributary channels are measured to obtain quantitative parameters of the underwater distributary channels; 4, the relation between the width of a channel sand body and the thickness of a single-stage sand body is established to calculate width-to-thickness ratio, a regression formula is established according to the quantitative parameters to predict an underwater distributary channel sand body. Qualitative description is conducted on underwater distributary channel distribution, qualitative description is also conducted on channel width, and a basis and a guidance are provided for research area periphery rolling development and finding of a beneficial facies belt of the underwater distributary channel sand body.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to a method for predicting the width of a delta front underwater distributary channel. Background technique [0002] Delta front deposits are an important type of reservoir deposits in continental oilfields in my country. In Shengli Oilfield, the proven reserves of crude oil in this type of reservoir are about 1.8 billion tons, accounting for more than 1 / 3 of the entire Shengli Oilfield. Subaqueous distributary channels are favorable facies for delta front deposition. Leeder has done some research on the width of the channel, and fitted the empirical formula of the width-to-depth ratio and depth of the full-channel channel, but this formula is only applicable to rivers with a curvature greater than 1.7. On the basis of the empirical formulas of Leeder, Leopoid and Wolman, Zhao Chenglin et al. obtained a comprehensive formula for calculating the width of channel sand b...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 王玮陈利孙玉花李靓李坚王瑞李志鹏高劲松刘峰姜官波
Owner CHINA PETROLEUM & CHEM CORP
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