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A technology for reservoir reconstruction and oil formation, which is applied in chemical instruments and methods, earthwork drilling, and fluid production, etc., and can solve the problems of lack of technical and theoretical research, poor formation permeability, and low productivity.
Active Publication Date: 2021-04-30
XINJIANG YONGSHENG ENERGY CO LTD
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Problems solved by technology
However, the technical and theoretical research on oil well sand-carrying fluid-squeezing reservoir stimulation is still lacking, and there are problems of poor formation permeability and low productivity
Method used
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Embodiment 1
[0058] Enter the design parameters according to the construction well conditions.
[0059] The steam injection effect of the well is currently poor, and it is necessary to squeeze out the reservoir to break the blockage, improve the permeability, and reduce the steam injection pressure at the wellhead.
[0063] 5. It is proposed that the intensity of this extrusion treatment is about 8.1m 3 / m, the treatment radius is 3.6m, and the calculated amount of sand-carrying plugging breaking fluid is 109m 3 .
[0064] 1. Basic data of oil layers in construction wells
[0065] The lithology of the reservoir is sandstone, and the storage space is a low-porosity, medium-low-permeability pore-fracture ...
Embodiment 2
[0122] Enter the design parameters according to the construction well conditions.
[0123] The steam injection effect of the well is currently poor, and it is necessary to squeeze out the reservoir to break the blockage, improve the permeability, and reduce the steam injection pressure at the wellhead.
[0124] String selection
[0125] The perforated thickness of the well is 21m, the treated thickness is 22.5m, and the porosity is 19%.
[0127] It is proposed that the intensity of this squeeze treatment is 10.7m 3 / m, the treatment radius is 4.2m, and the calculated amount of sand-carrying plugging breaking fluid is 150m 3 .
[0128] Carry out the absorption test, the test pressure is less than the set pressure 0.9MPa, then it meets the construction pressure, and the next step can be carried out; After setting the pressure, proceed to the next step.
[0129] Conduct pressure test...
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Abstract
The invention provides a sand-carrying liquid squeezing reservoir transformation method, and belongs to the technical field of oil field production increase and injection increase. The invention provides a sand-carrying liquid-squeezing reservoir transformation method. The method comprises the following steps that a sand-carrying liquid-squeezing reservoir is constructed; design parameters are input according to construction well conditions; pressure testing is conducted on the construction well, specifically, clear water pressure testing is conducted till the set pressure is reached, pressure stabilization is conducted for 10 min, and the construction well is qualified when the pressure drop is smaller than 0.5 MPa; a liquid supply pump is started to supply liquid to the pump truck, starting a sand supply device and a shock wave spraying device to mix liquid, and squeezing sand-carrying blockage breaking liquid into an oil layer of the construction well. Sand-carrying blockage breaking liquid is squeezed into an oil layer, pollution is displaced in a near-wellbore zone, the seepage radius is increased, the liquid supply capacity is improved, and the aims of increasing the yield and increasing injection of an oil well are achieved.
Description
technical field [0001] The invention relates to the technical field of increasing production and injection in oilfields, in particular to a sand-carrying and liquid-squeezing reservoir reconstruction method. Background technique [0002] The world's low-permeability oil and gas fields are rich in resources and widely distributed. Basically, all oil-producing countries have this type of oil and gas fields, and they are widely distributed in the United States, Canada, Australia, and Russia. In my country, low-permeability oil and gas fields are also widely distributed in various oil regions across the country, such as Daqing, Shengli, Liaohe, Changqing, Tuha, Zhongyuan, Xinjiang and other oil fields, which play an important role in contributing to world energy. As the world's demand for energy continues to increase, more and more difficult-to-use reserves have been put into development in recent years, and a large part of them are low-permeability oil fields. Low-permeability...
Claims
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Application Information
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