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A simulation experiment method and device for high temperature and high pressure reservoir dissolution

A simulation experiment, high temperature and high pressure technology, applied in the field of petroleum exploration, can solve the problems that the real formation conditions cannot be achieved, the experimental conclusion is affected, and the dissolution method cannot be selected.

Active Publication Date: 2021-04-30
PETROCHINA CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

However, the existing devices are mainly based on a single simulation experiment conducted under laboratory conditions or medium and low pressure conditions. The experimental environment cannot meet the real formation conditions and the dissolution method cannot be selected. The experimental equipment can only be used for one dissolution method.
Moreover, the existing methods are more qualitatively distinguishing the dissolved minerals through the comparison of images before and after the experiment. Due to the limitation of image selection, more dissolved minerals cannot be identified, which affects the final experimental conclusion.

Method used

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  • A simulation experiment method and device for high temperature and high pressure reservoir dissolution
  • A simulation experiment method and device for high temperature and high pressure reservoir dissolution
  • A simulation experiment method and device for high temperature and high pressure reservoir dissolution

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Embodiment 1

[0082] In order to predict whether oil and gas reservoirs are developed in the Middle and Lower Cambrian in the Kalping area, where the degree of exploration in the Tarim Basin is very low, and to provide guidance for the block bidding work in this area. This embodiment provides a simulation experiment method, which is through figure 1 The shown device is completed, specifically comprising the following steps:

[0083] Fresh samples collected from outcrops in the field were processed to make a standard plunger sample with a diameter of 2.474 cm and a length of 4.117 cm. Both ends of the plunger sample were ground flat and the end face was perpendicular to the cylinder. After drying at 200°C for 4 hours, the sample was weighed, and the weight was 55.045g. The measured porosity is 10.97%, and the permeability is 4.2mD.

[0084] Carry out X-ray diffraction analysis to this sample, measure its component, and component data is shown in Table 1

[0085] Table 1 Sample X-ray diffr...

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Abstract

The invention provides a simulation experiment method and device for high-temperature and high-pressure reservoir dissolution. The simulation experiment method includes: determining the rock mineral composition and element content of the reservoir sample; determining the dissolution reaction solution according to the fluid characteristics experienced during the geological evolution of the reservoir; according to the formation temperature and pressure experienced during the burial evolution of the reservoir, Determine the temperature and pressure of the dissolution reaction in the simulation experiment; determine the dissolution method of the simulation experiment according to the dissolution method of the reservoir during the burial evolution process; conduct the dissolution simulation experiment to complete the simulation of the dissolution of the high-temperature and high-pressure reservoir. The invention also provides a simulation experiment device which can be used in the above method. The simulation experiment method and device of the present invention can truly simulate reservoir conditions.

Description

technical field [0001] The invention relates to an experiment method and device, in particular to a simulation experiment method and device for high-temperature and high-pressure reservoir dissolution, belonging to the technical field of petroleum exploration. Background technique [0002] At present, oil and gas exploration has been drilled from shallow layers to deep layers, and the problems faced by this are the increase of deep drilling costs and the increase of exploration risks. One of the biggest risks is whether there are effective reservoirs in the deep layers of petroleum basins. [0003] There are various types of rocks in reservoirs, including carbonate rocks, clastic rocks, volcanic rocks and metamorphic rocks, and all rock media that can satisfy oil and gas storage can be used as oil and gas reservoirs. This requires us to judge whether these media that can be used as oil and gas storage develop reservoir space under deep burial conditions. For clastic rocks,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N17/00
CPCG01N17/00
Inventor 林潼李志生王东良李剑王蓉孙建虎马成华张光武王岚谢增业
Owner PETROCHINA CO LTD
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