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Method for identifying multi-well sedimentary microfacies by utilizing clustering method

A technology of sedimentary microfacies and clustering method, which is applied in the direction of earthwork drilling and production, wellbore/well components, etc. It can solve the problems of large well data, heavy workload, and long research cycle, so as to improve resolution and reduce workload , the effect of shortening the research cycle

Active Publication Date: 2017-09-15
PETROCHINA CO LTD
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Problems solved by technology

However, for a higher degree of exploration and a large number of well data, the above method has a large workload and a long research period, which cannot meet the needs of actual exploration.

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  • Method for identifying multi-well sedimentary microfacies by utilizing clustering method
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  • Method for identifying multi-well sedimentary microfacies by utilizing clustering method

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Embodiment Construction

[0079] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0080] The present invention provides a kind of method utilizing clustering method to identify multi-well sedimentary microfacies, comprising the following steps: S1, collecting the logging geological data of each well location so as to obtain the lithology combination index; S2, selecting from the data obtained in step S1 It can reflect the lithological combination index between different sedimentary microfacies; S3, carry out layering to each well position described in step S1, and count the lithological combination index selected in step S2 in each layer according to the layered data; S4, to step The value range of the lithology index obtained in S3 is controlled within the range where the minimum value is 0 and t...

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Abstract

The invention relates to a method for identifying multi-well sedimentary microfacies by utilizing a clustering method. The method comprises the following steps that S1, logging geological data of each well site are collected and various lithological combination indexes are obtained; S2, lithological combination indexes capable of reflecting different sedimentary microfacies are selected from the obtained data in the step S1; S3, the well sites in the step S1 are layered, and the lithological combination indexes selected in the step S2 in each layer are processed according to layered data; S4, the value region of the obtained lithological combination indexes in the step S3 is controlled to a range in which the existing minimum value is 0, and the maximum value is 1, and normalization processing is conducted on the lithological combination indexes which do not belong to the range; S5, clustering analyzing is conducted on a multi-well sample space through the obtained lithological combination indexes in the step S4; S6, according to a clustering analyzing effect, different classification ranks are selected to be subjected to sedimentary facies associating and sedimentary microfacies identifying; and S7, utilizing single-well sedimentary microfacies analyzing effects, a sedimentary microfacies planar distribution diagram is drawn according to the spatial configuration rule of the sedimentary microfacies.

Description

technical field [0001] The invention relates to exploration of mineral oil and gas resources, in particular to a method for identifying multi-well sedimentary microfacies by using a clustering method. Background technique [0002] Sandstone reservoirs are rock formations that can store and infiltrate fluids, that is, reservoirs, rock formations that can store and infiltrate oil and gas. [0003] Sedimentary microfacies plays an important role in guiding the search and evaluation of sandstone reservoirs. It is one of the main contents of oil and gas exploration to determine the distribution characteristics of sandstone reservoirs and evaluate their storage performance by studying the spatial configuration relationship of sedimentary microfacies. [0004] The existing research methods of sedimentary microfacies are generally to study the sedimentary characteristics of a certain point through single well data, then analyze the sedimentary characteristics of the profile through ...

Claims

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Application Information

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IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 蒲秀刚周立宏肖敦清陈长伟杨飞姜文亚韩文中张伟时战楠刘永祯林常梅王颖孙鹏
Owner PETROCHINA CO LTD
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