Shale gas reservoir rock debris and rock core quantitative description method

Abstract

The invention relates to a shale gas reservoir rock debris and rock core quantitative description method. The shale gas reservoir rock debris and rock core quantitative description method comprises the steps that to-be-described well geological data, to-be-described well logging data and to-be-described well while-drilling well logging data are collected; a to-be-described shale gas reservoir well section is determined according to the data; shale gas reservoir exploratory well description parameters and shale gas reservoir development well description parameters are determined according to a well site report and a well drilling design document; a curve scale range of shale gas well reservoir quantitative description parameters is judged; a filling mode, a drawing style and an arrangement mode of a curve graph are determined; track width setting is conducted; a shale gas reservoir rock debris and rock core quantitative description board chart is drawn; a shale gas reservoir lithofacies association type is determined; shale gas reservoir quality is evaluated; whether quantitative description clearly expresses shale gas reservoir characteristics or not is determined, and if quantitative description does not clearly express the shale gas reservoir characteristics, the previous steps are repeated, and if quantitative description clearly expresses the shale gas reservoir characteristics, the next step is conducted; and the quantitative description board chart is output. The shale gas reservoir rock debris and rock core quantitative description method is applied to 120 wells in the Fuling shale gas field for practices, and the practices prove that the method provides reliable information for shale gas horizontal well geologic steering and shale gas quality comprehensive evaluation.

Description

technical field [0001] The invention belongs to the field of shale gas exploration and development reservoir evaluation, and in particular relates to a quantitative description method for cuttings and cores of shale gas reservoirs. Background technique [0002] The traditional view holds that shale is source rock and cannot constitute an effective reservoir. With the breakthrough of domestic shale gas exploration and development technology, especially the successful development of Fuling shale gas field, the development of domestic shale gas exploration and development technology has been promoted. The research on shale gas reservoir has become a hot topic, and its energy revolution is of great significance. [0003] At present, the on-site shale gas reservoir description is mainly based on the operator's personal experience. Compared with the traditional clay rock cuttings and core description methods, the emphasis is on describing the rock color, the content change and dis...

AI Technical Summary

Problems solved by technology

[0003] At present, the on-site shale gas reservoir description is mainly based on the operator's personal experience. Compared with the traditional clay rock cuttings and core description methods, the focus is on describing the rock color, the content change and distribution of non-clay minerals, and the reaction with dilute hydrochloric acid. conditions, physical properties, structures, structures, fossils and inclusions, oil-bearing conditions, and contact relationships, etc., there is no unified description mode, and the description forms are mainly qualitative, which is not suitable for the description of shale gas reservoirs; it is urgent to establish a shale gas reservoir The gas reservoir cuttings and core quantitative description method is used to accurately and quantitatively describe the lithology and lithophase characteristics of shale gas reservoirs, improve the accuracy and reliability of shale gas reservoir identification and quality evaluation, and provide a basis for the efficient development of shale gas. reliable information

Images