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Non-dominant facies mapping method for sedimentary facies

A technology of sedimentary facies and dominant facies, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve problems such as unclear cutting and superimposing structures of sand bodies, and achieve an objective effect of spreading range

Active Publication Date: 2018-11-23
CHINA NATIONAL OFFSHORE OIL (CHINA) CO LTD +1
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Problems solved by technology

The advantage of this method is that it can reflect the overall development of sedimentary facies in the stratigraphic unit. However, with the development of oil and gas fields, the well spacing is getting smaller and smaller. The overlay structure is not clear

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  • Non-dominant facies mapping method for sedimentary facies
  • Non-dominant facies mapping method for sedimentary facies
  • Non-dominant facies mapping method for sedimentary facies

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Embodiment Construction

[0010] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0011] A kind of sedimentary facies non-dominant facies mapping method provided by the present invention, it comprises the following steps:

[0012] 1) Identify the major microfacies and non-dominant microfacies in the stratigraphic unit framework to be mapped, and obtain the dominant and non-dominant sedimentary facies of the stratigraphic unit to be mapped.

[0013] The so-called non-dominant facies refers to the type of microfacies that is ignored in the compilation of conventional sedimentary facies maps, that is, the non-dominant microfacies. It generally includes two types: one is fine-grained deposits, including mudstone, argillaceous siltstone, silty mudstone, silty fine sandstone, etc.; the other is thin-bedded deposits, that is, strata less than 20% of the thickness of the adjacent dominant facies. The non-dominant facies identification met...

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Abstract

The invention provides a non-dominant facies mapping method for a sedimentary facies. The method comprises (1) identifying a main force microfacies and an non-main force microfacies in the formation to be mapped to obtain a dominant sedimentary facies and a non-dominant sedimentary facies of the formation units to be mapped; (2) carrying out a sub-segment division for the obtained the dominant sedimentary facies and the non-dominant sedimentary facies, so that each sub-segment represents one or one stage sedimentary microfacies; (3) distinguishing the dominant sedimentary facies and the non-dominant sedimentary facies types of all sub-sections of a single well to obtain the types of all the dominant sedimentary facies and the non-dominant sedimentary facies; 4)determining a combination principle of the dominant sedimentary facies and the non-dominant sedimentary facies, and performing sedimentary facies spatial combination on the dominant sedimentary facies and the non-dominant sedimentary facies; 5)and compiling a profile phase diagram according to the obtained types of all the dominant sedimentary facies and the non-dominant sedimentary facies and the determined combination principle of the dominant sedimentary facies and the non-dominant sedimentary facies to obtain the sedimentary facies mapping results considering the non-dominant facies. The method can be widely applied to the field of sedimentary facies mapping.

Description

technical field [0001] The invention belongs to the field of oilfield exploration and development, in particular to a method for compiling a map of non-dominant sedimentary facies. Background technique [0002] Sedimentary facies research is an essential link in oilfield exploration and development, and subsequent prediction of favorable zones, deployment of exploratory wells, geological modeling, division of development strata, and deployment of development well patterns are closely related to it. The existing sedimentary facies maps are generally constrained by the isochronous stratigraphic framework and compiled on the basis of the dominant sedimentary facies of each well point inside the framework, mainly due to the large well spacing condition. The advantage of this method is that it can reflect the overall development of sedimentary facies in the stratigraphic unit. However, with the development of oil and gas fields, the well spacing is getting smaller and smaller. T...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 宋来明胡光义范廷恩梁旭刘向南许磊张雨晴
Owner CHINA NATIONAL OFFSHORE OIL (CHINA) CO LTD
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