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Method for accurately describing lithological characters of unconventional tight oil gas core in detail

A conventional tight and lithological technology, applied in the field of fine and accurate description of unconventional tight and shale core lithology, can solve problems such as low resource abundance and poor reservoir quality

Active Publication Date: 2014-03-05
PETROCHINA CO LTD +1
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Problems solved by technology

The above-mentioned standard methods are aimed at conventional oil and gas core lithology description methods, and are not suitable for unconventional tight and muddy shale core lithology fine description and "seven properties" with low resource abundance, poor reservoir quality, and strong heterogeneity. need for evaluation

Method used

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  • Method for accurately describing lithological characters of unconventional tight oil gas core in detail
  • Method for accurately describing lithological characters of unconventional tight oil gas core in detail
  • Method for accurately describing lithological characters of unconventional tight oil gas core in detail

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Embodiment 1

[0027] The implementation process of the method of the present invention will be described below by taking the unconventional tight and shale oil exploration well Qp1 in the Daqing exploration area as an example.

[0028] 1. Background

[0029] In order to achieve a breakthrough in the exploration and development of unconventional tight and shale oil in the Daqing exploration area, the key exploration well Qp1 was deployed in the Qijia area in the northern Songliao Basin. Obtain industrial oil flow with a daily output of 10.2t. The three-scale fine and accurate description of core lithology was carried out in Well Qp1, which laid a foundation for the evaluation of the "seven properties" of unconventional tight and shale reservoirs and the exploration and development research.

[0030] 2. Three-scale fine description of tight and muddy shale core lithology and experimental samples

[0031] The method of step 1), step 2) and step 3) was used to describe the core lithology of t...

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Abstract

The invention relates to a method for accurately describing lithological characters of an unconventional tight oil gas core in detail. The method is characterized by including the following steps that firstly, the lithological characters of the tight shale core obtained by drilling are described on spot through a conventional method to obtain a result about conventional description of the lithological characters of the tight shale core; secondly, a result about centimeter-level description of the lithological characters of the tight shale core is obtained; thirdly, a result about millimeter-level description of the lithological characters of the tight shale core is obtained; fourthly, a thin section authentication result of the lithological characters of the tight shale oil core is obtained; fifthly, a result about three-scale detailed and accurate description of the lithological characters of the tight shale oil core is obtained; sixthly, a lithological section histogram of the tight shale oil core is drawn. According to the method for accurately describing the lithological characters of the unconventional tight oil gas core in detail, the three-scale lithological character description method is adopted to accurately describe the lithological characters of the unconventional tight shale core in detail, and the demand for different research scales and purposes of unconventional tight shale is met.

Description

Technical field: [0001] The invention relates to a fine and accurate description method for rock core lithology in the technical field of oil and gas exploration and development in oilfields, in particular to a fine and accurate description method for unconventional tight and mud shale core lithology. Background technique: [0002] In recent years, unconventional oil and gas resources such as tight and muddy shale oil, shale gas, heavy oil and oil sands have been developed on a large scale, pushing the global oil industry into a new stage where conventional and unconventional oil and gas resources are equally important. my country's tight and muddy shale Significant progress has been made in oil production, such as the discovery of the Sulige tight gas area in the Ordos Basin, and the tight oil areas in the Gaotaizi and Fuyang oil layers in the northern Songliao Basin. Tight oil has become the most realistic unconventional oil and gas resource and is expected to become an impo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/40
Inventor 冯子辉张居和邵红梅徐喜庆霍秋立潘会芳黄丽娜董忠良
Owner PETROCHINA CO LTD
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