A Physical Simulation Method for Water Invasion Location in Fractured Edge-bottom Water-Gas Reservoirs with Low Permeability
A physical simulation, low-permeability technology, applied in earthwork drilling, measurement, wellbore/well components, etc., can solve the problem of water intrusion positioning in fractured gas reservoirs with edge and bottom water that is difficult to simulate, and achieve an increase in the area of water lock , the effect of increasing the loss rate of gas production and increasing the propulsion speed of bottom water
Inactive Publication Date: 2019-04-16
NORTHEAST GASOLINEEUM UNIV
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Problems solved by technology
[0003] The present invention aims to overcome the problem that it is difficult to simulate the location of water intrusion in edge-bottom water fractured gas reservoirs in the existing physical simulation experiments in the background technology, and provides a physical simulation method for water invasion location of low-permeability fractured edge-bottom water gas reservoirs
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Embodiment 1
[0023] Physical simulation method for water invasion location in low-permeability fractured edge-bottom water-gas reservoirs:
[0024] (1) Preparation and solidification of rock core: the rock core is composed of quartz sand and cement, the mass percentage of quartz sand and cement is 85%-95% of quartz sand, and 15%-5% of cement. Core appearance size: length × height × thickness = 30 ~ 60cm × 30 ~ 60cm × 4.5 ~ 9cm, from high permeability (1000 × 10 -3 μm 2 ~10000×10 -3 μm 2 ) and low permeability (0.1×10 -3 μm 2 ~10×10 -3 μm 2 ) area, wherein the size of the high permeability area: length x height x thickness = 30-60 cm x 1.5-3.0 cm x 4.5-9 cm. Before the core is solidified, according to the pre-designed fracture length, width and angle with the horizontal plane, starch paper is placed at the predetermined position in the low-permeability area of the core (thickness is controlled by the number of overlapping paper);
[0025] (2) Several pairs of electrodes are arrang...
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The invention relates to a physical simulation method for water invasion location of a low-permeability fractured side-bottom water-gas reservoir. It mainly solves the problem that it is difficult to simulate the location of water invasion in fractured gas reservoirs with edge and bottom water in the existing physical simulation experiments. It is characterized in that it includes the following steps: (1) preparing rock cores; (2) arranging electrodes and casting rock cores; (3) putting rock cores into pressure vessels and connecting gates; (4) physically simulating water intrusion in edge-bottom water gas reservoirs. The experimental data obtained by this physical simulation method can truly reflect the law of water invasion in low-permeability fractured edge-bottom water gas reservoirs, and it can be used to optimize gas well production proration and other parameters during gas reservoir development.
Description
technical field [0001] The invention relates to the technical field of gas reservoir development, in particular to a physical simulation method for water invasion positioning of low-permeability fractured edge-bottom water gas reservoirs. Background technique [0002] Among the gas reservoirs discovered abroad, low-permeability fractured edge-bottom water gas reservoirs account for a considerable proportion, and their contribution to natural gas production occupies a very important position. With the continuous deepening of natural gas exploration and development in my country, the proven reserves and production of low-permeability fractured edge-bottom water gas reservoirs are also increasing year by year. Fractured gas reservoirs are more difficult to develop than non-fractured gas reservoirs because of their complex structure. If there is edge and bottom water in the gas reservoir, once the water flows along the fracture channel to the gas well, part of the gas will be b...
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IPC IPC(8): E21B47/10E21B47/06E21B47/00
CPCE21B47/00E21B47/06E21B47/10
Inventor 周彦霞卢祥国胡勇牛丽伟刘进祥喻琴孙哲苏鑫曹伟佳
Owner NORTHEAST GASOLINEEUM UNIV