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Tight reservoir millimeter-level sample oil source direct analysis and comparison method

A tight reservoir, millimeter-scale technology, applied to the analysis of materials, material separation, measurement devices, etc., can solve the problems of unclear source of crude oil and oiliness

Inactive Publication Date: 2019-08-06
NORTHEAST GASOLINEEUM UNIV
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Problems solved by technology

The direct analysis and comparison method of the present invention achieves the purpose of evaluating the oiliness of millimeter-scale samples in tight reservoirs and comparing oil sources, meets the needs of unconventional tight oil and shale oil fine exploration for geological experiment technology, and solves the problem of unconventional tight oil. Unclear problem of crude oil source and oiliness in reservoir source-reservoir micro-combination

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  • Tight reservoir millimeter-level sample oil source direct analysis and comparison method
  • Tight reservoir millimeter-level sample oil source direct analysis and comparison method
  • Tight reservoir millimeter-level sample oil source direct analysis and comparison method

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specific Embodiment

[0052] The implementation process of the method of the present invention is illustrated by taking tight oil prospecting well Qp1 in the Daqing exploration area as an example.

[0053] Well Qp1 is a pre-exploration well for medium-shallow tight oil in the Daqing exploration area. It is located in the Xingxi nose structure of the Qijia Sag in the central depression of the Songliao Basin. The formations encountered are Quaternary, Tertiary Taikang Formation, Upper Cretaceous Mingshui Formation, Sifangtai Formation, Lower Cretaceous Nenjiangzu, Yaojia Formation and Qingshankou Formation. Large-scale volumetric fracturing was used in Qing 2 and 3 Members of Qingshankou Formation, and a daily production of 10.2 tons of industrial oil flow was obtained, showing a good prospect for tight oil exploration in the Gaotaizi source in the northern Songliao Basin. In order to further study the formation mechanism and oiliness of unconventional tight oil and shale oil, based on the fine and a...

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Abstract

The invention relates to a tight reservoir millimeter-level sample oil source direct analysis and comparison method. The method includes the following steps that: a borehole rock core is treated according to a non-conventional tight and mud shale rock core lithology fine and accurate description method, so that a tight reservoir rock core lithology description result is obtained; the rock core isfrozen and then is cut according to the obtained tight reservoir rock core lithology description result, and a frozen rock core sample is obtained; the centimetre-level or millimeter-level stripes ofthe tight reservoir and source-reservoir micro-combination of the sample are drilled so as to be sampled, and an obtained sample is packaged, and then is frozen and stored; a milligram-level sample from the frozen and stored sample is weighed, and is arranged in the heat-release tube of a tight reservoir oil source direct analysis and comparison system, after heat release is performed, a tight reservoir and source-reservoir micro-combination rock hydrocarbon fingerprint analysis spectrogram and data are obtained, and analysis data processing is carried out, and hydrocarbon fingerprint analysisgeological experiment parameters and fingerprint ratio parameters are obtained; and non-conventional tight oil and mud shale oil source-reservoir micro-combination oil source comparison and oilinessevaluation are carried out on the basis of the geological experiment parameters and the fingerprint ratio parameters.

Description

technical field [0001] The invention relates to an oil and gas geological experiment analysis method, in particular to a system and method for direct analysis and comparison of millimeter-level sample oil sources in tight reservoirs, and belongs to the field of formation mechanism and exploration of unconventional oil and gas. Background technique [0002] In recent years, unconventional oil and gas resources such as tight sandstone oil (referred to as tight oil), tight conglomerate gas (referred to as tight gas), mud shale oil, shale gas and other unconventional oil and gas resources have achieved large-scale development, pushing the global oil industry into the conventional and unconventional oil and gas industry. A new stage of equal emphasis on resources. Industrial breakthroughs have been made in YP1, QP1 and SYY1 wells in the exploration of medium and shallow tight oil and shale oil in the northern Songliao Basin, showing good prospects for the exploration and developm...

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06
Inventor 张博为冯军付晓飞吕延防付广张云峰
Owner NORTHEAST GASOLINEEUM UNIV
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