Indoor simulation method for collaborative huff and puff of horizontal well group
A simulation method and technology for horizontal wells, which are applied in earth-moving drilling, wellbore/well components, and production fluids, etc., which can solve the problem of poor pressure-bearing capacity of physical models and the inability of single-well huff and puff models to intuitively reflect spatial distribution and mutual synergy. , It is difficult to achieve physical simulation of throughput and other problems
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Embodiment 1
[0066] This embodiment provides a device for simulating the effect of edge water in the well group under the formation dip angle environment, the device includes:
[0067] Core model, core holder, fluid injection module, fluid collection module, pressure measurement module and auxiliary components;
[0068] Among them, the core model with 5 well strings is placed in the core holder, and the top of the core holder has 5 through holes corresponding to the position of the core model well string; one end of the pipeline communicates with the through hole , the other end can communicate with the fluid injection module, the fluid collection module or the pressure measurement module;
[0069] The fluid injection module includes a liquid injection device and a gas injection device. The liquid injection device provides injection of simulated formation water and simulated oil; the gas injection device provides CO 2 injection; the liquid injection device used in this example includes a ...
Embodiment 2
[0090] This embodiment provides a horizontal well group CO using the device of Embodiment 1 for edge water action. 2 Physical simulation method of coordinated throughput (coordinated throughput of one well).
[0091] 1. Experimental materials
[0092] Experimental oil: simulated oil prepared from degassed and dehydrated crude oil and kerosene in an oilfield block. The simulated oil has a viscosity of 289mPa·s at a formation temperature of 60°C.
[0093] Experimental water: The target block simulates formation water, with a total salinity of 937mg / L.
[0094] Injection gas: CO 2 , with a purity of 99.99%.
[0095] 2. Experimental steps:
[0096] (1) According to Figure 2a and Figure 2b The physical map of the three-dimensional physical model shown is compressed into an artificial heterogeneous core model for experiments; the core model for experiments is polished with sandpaper to ensure that the surface of the core is smooth, the surface is cleaned with flowing water, ...
Embodiment 3
[0119] This embodiment provides a horizontal well group CO using the device of Embodiment 1 for edge water action. 2 Physical simulation method of coordinated huff and puff (two wells inject CO 2 Synergistic huff and puff), this method is basically the same as the steps in Example 2, the difference is that in step (6), the horizontal well group consisting of two wells, low part #4+high part #3, is selected as the injection well for CO2 injection. 2 Collaborative throughput physics simulation experiment.
[0120] Two wells (low part #4 + high part #3) inject CO 2 The results of collaborative throughput experiments are shown in Table 2 and Figure 5 shown. Under the experimental conditions, the total recovery degree of the model is 28.78%. Among them, the recovery degree of the model in the natural energy development stage is 15.71%, the comprehensive water content of the model is 85.31% at the end of natural energy exploitation, the injection volume of edge water is 714.78m...
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Abstract
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