General sand-prevention well single-point layered steam-injection method
A layered steam injection and sand control technology, which is applied in the direction of earthwork drilling, wellbore/well components, production fluids, etc., can solve the problems that sand control strings cannot be effectively implemented, layered steam injection cannot be realized, and simultaneous injection cannot be realized. , to achieve the effect of low cost, low cost and wide application range of steam injection process
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Embodiment 1
[0033] Such as figure 1 As shown, there are two oil layers, and the oil layer with strong vapor absorption capacity is in the upper part. Insulated oil pipe 1, thermal expansion compensator 2, sand control packer 3, sand control pipe 4, gravel packing layer 5, interlayer heat-sensitive packer 6, steam injection pipeline outlet 7, artificial well bottom 8, strong steam absorption capacity Oil layer 9, oil layer 10 with poor vapor absorption capacity. The selected general sand control well single-point layered steam injection string includes heat-insulated oil pipes and steam injection pipes connected sequentially from top to bottom. Interlayer heat-sensitive packer. The interlayer heat-sensitive packer is set on the inner wall of the sand control pipe and is located between two oil layers. The injected steam enters the thermal expansion compensator 2 with thermal elongation compensation ability through the heat-insulated oil pipe 1 , and then further flows into the sand contr...
Embodiment 2
[0035] Such as figure 2As shown, there are two oil layers, the oil layer with strong vapor absorption capacity is in the upper part, and the oil layer with strong vapor absorption capacity is in the lower part. Insulated oil pipe 21, thermal expansion compensator 22, sand control packer 23, sand control pipe 24, gravel packing layer 25, steam injection perforated screen 26, interlayer thermal packer 27, steam injection pipeline plug 28, Artificial well bottom 29, oil layer 210 with poor vapor absorption capacity, and oil layer 211 with strong vapor absorption capacity. The selected general sand control well single-point layered steam injection string includes heat-insulated oil pipes and steam injection pipes connected sequentially from top to bottom. Interlayer heat-sensitive packer and steam injection perforated screen. The interlayer heat-sensitive packer is set on the inner wall of the sand control pipe and is located between two oil layers. The injected steam enters thr...
Embodiment 3
[0037] Such as image 3 As shown, there are three oil layers, and the oil layer with poor vapor absorption capacity is in the middle. It mainly includes heat-insulating oil pipe 31, thermal expansion compensator 32, sand control packer 33, sand control pipe 34, gravel packing layer 35, upper interlayer thermal packer 36, steam injection perforated screen 37, lower interlayer thermal Sensitive packer 38, steam injection pipeline plug 39, artificial well bottom 310, oil layer with poor steam absorption capacity 311, lower oil layer with strong steam absorption capacity 312, upper oil layer with strong steam absorption capacity 313. The selected general sand control well single-point layered steam injection string includes heat-insulated oil pipes and steam injection pipes connected sequentially from top to bottom. Interlayer heat-sensitive packers and steam injection perforated screens. There are two interlayer heat-sensitive packers set on the inner wall of the sand control pi...
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