Bioclastic limestone reservoir heterogeneity research method

A technology of reservoir heterogeneity and biodetritus, which is applied in the field of oil and gas exploration and development, can solve the problems of unfavorable reservoir fine understanding and single evaluation scale, and achieve the effect of improving understanding

Inactive Publication Date: 2015-11-25
中国石油集团长城钻探工程有限公司地质研究院
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Problems solved by technology

[0006] 1. It is only a single evaluation scale (macro or micro), which is not conducive to the fine understanding of reservoirs
[

Method used

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  • Bioclastic limestone reservoir heterogeneity research method
  • Bioclastic limestone reservoir heterogeneity research method
  • Bioclastic limestone reservoir heterogeneity research method

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Embodiment Construction

[0056] Below in conjunction with accompanying drawing and example the present invention will be further described:

[0057] Taking the heterogeneity evaluation of bioclastic limestone reservoirs in a certain block as an example to illustrate the specific technical solution of the invention:

[0058] Described method comprises the following steps (can refer to figure 1 ):

[0059] a. Sedimentary microfacies division of bioclastic limestone reservoirs;

[0060] b. Establish the distribution interval standard of porosity and permeability parameters of different microfacies;

[0061] c. Draw a regional sedimentary facies map to investigate the relationship between the productivity of different well locations and the distribution of sedimentary facies belts;

[0062] d. Through the analysis of diagenesis types, establish the corresponding relationship between main diagenesis types and lithology;

[0063] e. Pore structure research and reservoir classification, and according to th...

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Abstract

The invention provides a bioclastic limestone reservoir heterogeneity research method. The method specifically comprises the following steps that sedimentary microfacies dividing is performed on a bioclastic limestone reservoir; a pore permeability parameter distribution interval standard of different microfacies is built; a region sedimentary facies map is drawn, and the relation between the productivity and sedimentary microfacies belt distribution state of different well locations is inspected; the corresponding relation between main diagenesis types and lithological characters is built through diagenesis type analysis; pore structure research and reservoir classification are performed, and pore diagenetic degree classification grades of different diagenesis types are supplied according to a reservoir classification result; an imitated variable coefficient, an imitated dart coefficient and an imitated range of the bioclastic limestone reservoir are calculated, and numerical intervals of all-grade heterogeneity parameters are supplied. According to the method, the bioclastic limestone reservoir heterogeneity is researched jointly from the macroscopic aspect and microcosmic aspect, and the improvement of the reservoir permeability mechanism knowledge and the guidance of the effective development of oil and gas fields are facilitated.

Description

technical field [0001] The invention relates to a method for studying the heterogeneity of bioclastic limestone reservoirs, in particular to a method for studying the heterogeneity combining geology, well logging and other multi-disciplinary macroscopic and microscopic aspects, belonging to oil and gas exploration and Develop technical fields. Background technique [0002] Reservoir heterogeneity research is an important research content of oil and gas exploration and development, and the degree of reservoir heterogeneity directly restricts the effective development of oil and gas. [0003] Bioclastic limestone reservoirs are generally developed near the margins of carbonate platforms and belong to large-scale marine carbonate deposits, mostly porous bioclastic limestone, with relatively few fractures. Good reservoir physical properties Relatively high porosity (6%-30%), various rock types, including micrite, bioclastic micrite, micrite bioclastic, bioclastic and dolomitic ...

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Application Information

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IPC IPC(8): G01N33/24G01V5/00
Inventor 丛云海岳海玲朱世和白国斌李昌绵张明瑜苟其勇高源朱鸿翔白润飞
Owner 中国石油集团长城钻探工程有限公司地质研究院
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