Oil reservoir division and comparison method based on high resolution sequence stratigraphy

A sequence stratigraphic, high-resolution technology, applied in the field of oil layer division and comparison, can solve problems such as time penetration, and achieve the effect of avoiding the phenomenon of time penetration

Inactive Publication Date: 2016-07-27
CHINA UNIV OF GEOSCIENCES (BEIJING)
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Problems solved by technology

[0005] The main purpose of the present invention is to provide a method for dividing and correlating oil layers based on high-resolution ...

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  • Oil reservoir division and comparison method based on high resolution sequence stratigraphy
  • Oil reservoir division and comparison method based on high resolution sequence stratigraphy
  • Oil reservoir division and comparison method based on high resolution sequence stratigraphy

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Embodiment Construction

[0019] The main idea of ​​the present invention is that, based on high-resolution sequence stratigraphy, oil layer division and correlation units are determined by dividing different order cycles and an isochronous sequence correlation framework is established. The medium-term base level cycle corresponds to the division of oil groups; the short-term The base-level cycle corresponds to the division of sand formations; according to the established sequence stratigraphic framework, sub-layers are divided and compared under the control of cycles and stratigraphic superimposition patterns, which can effectively avoid the time-traveling phenomenon that often occurs in the process of oil layer correlation.

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] According to an embodiment of ...

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Abstract

The invention discloses an oil reservoir division and comparison method based on high resolution sequence stratigraphy. The oil reservoir division and comparison method comprises the steps of: identifying medium-term base level cycles based on rock cores, drilling/logging seismic data, high resolution sequence stratigraphy, base level cycles and an admissible space change principle, by means of the change trend of an A/S value; dividing and comparing oil groups by interfaces and flooding surfaces of the identified medium-term base level cycles; based on the drilling/logging seismic data, the flooding surface and conversion surface of the change of a reference surface, identifying short-term base level cycles, and dividing and comparing sand groups; according to the identified superposed modes of short-term base level cycles, establishing an isochronous stratigraphic framework by means of comparison; and according to the stratigraphic framework, controlling division and comparison small layers under the control of the cycle and stratum superposed modes. The oil groups, the sand groups and the small layers are included in an oil reservoir division and comparison unit. According to the invention, the oil reservoir division and comparison method solves the problem in the prior art that a diachronous phenomenon usually occurs in the comparison process.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to a method for dividing and comparing oil layers based on high-resolution sequence stratigraphy. Background technique [0002] Reservoir correlation is the most basic work in oilfield development. Petroleum workers in my country have applied various correlation methods, including biostratigraphic correlation, lithologic-stratigraphic correlation, and iso-thickness correlation. The limitations of biostratigraphic correlations are regional, fossil diachronic and dumb strata. The lithological comparison method is only applicable to a smaller range with the same geological conditions. In addition, lithology-stratigraphy correlation and iso-thickness correlation often appear time-traversing phenomenon, which leads to the contradiction between the geological model of sandbody correlation and the production dynamic data. [0003] High-resolution sequence ...

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Application Information

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IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/61G01V2210/6161G01V2210/6169G01V2210/624
Inventor 王红亮多雪梅徐小龙赵世杰
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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