Large-scale three-dimensional simulation method for exploiting super-heavy oil reservoir through FUSE technology

A simulation method, a technology for super heavy oil, applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve problems such as shortage, and achieve the effect of reducing steam cycle time

CN110761781AInactive Publication Date: 2020-02-07CHONGQING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-02-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a three-dimensional simulation method for exploiting a super-heavy oil reservoir through an FUSE technology. The method is implemented under the true triaxial loading conditionand comprises the following steps of target stratum simulation, stress loading, hydraulic expansion, steam circulating process simulation and heavy oil extracting and exploiting process simulation. Asimilar material and natural oil sand are adopted to simulate the stratum, stress loading is conducted to restore the true reservoir stratum stress environment, and oil sand reservoir stratum hydraulic expansion is conducted through a high-pressure water pump and a pre-buried stainless steel pipe; temperature data of different time and stratum positions are collected through a temperature sensor;the communication performance of double horizontal wells and the developing situation of the expansion area are detected; then, high-temperature steam injection circulation operation is conducted through a steam generator, temperature data are collected through a temperature sensor, and real-time monitoring of steam cavity expanding is achieved; and after the reservoir stratum temperature reachesthe transferring temperature, heavy oil exploiting is conducted through an external negative-pressure extracting exploiting system. The three-dimensional simulation method provides an effective testing measure and method for studying the mechanism of exploiting the super-heavy oil reservoir through the FUSE technology.
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Description

technical field

[0001] The invention relates to the technical field of model tests for mining methods of super-heavy oil reservoirs, in particular to a large-scale three-dimensional simulation test method for mining super-heavy oil reservoirs with FUSE technology. Background technique

[0002] my country is rich in heavy oil resources, and heavy oil has been exploited in Xinjiang, Liaohe, Shengli, Tarim and other oil regions. The ultra-heavy oil sand reservoir is a special kind of oil reservoir. The heavy oil has extremely high viscosity and poor fluidity. It is difficult to develop the heavy oil reservoir efficiently by conventional oil and gas recovery technology. Heating oil sand reservoirs can reduce the viscosity of heavy oil, increase its fluidity, and improve the efficiency of heavy oil production. However, the efficiency of conventional steam stimulation is extremely low and cannot meet the needs of heavy oil production. In 1978, Dr. Buter of Canada proposed the Ste...

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Embodiment Construction

[0036] Below in conjunction with accompanying drawing, the present invention will be further described, embodiment is exemplary, only for revealing and explaining the present invention, in order to fully understand the present invention, but does not therefore limit the present invention to described implementation within the scope of the example.

[0037] see figure 1 , a large-scale 3D simulation method for super-heavy oil reservoirs exploited by FUSE technology, carried out under true triaxial loading conditions, and includes the following steps:

[0038] The first step, target stratum simulation: including sample preparation and cable connection; the sample preparation includes sequentially pressing from bottom to top in the true triaxial loading test piece box according to the properties of the core drilled on site The bottom layer, the oil sand reservoir with interlayer and the simulated formation of the caprock, and in the process of suppressing the oil sand reservoir ...