A method of producing oil and gas
An oil and gas and oil pipe technology, which is applied in the field of oil and gas field exploitation, can solve the problems of increasing operating costs, affecting the economic benefits of oil and gas fields, and reducing the efficiency of oil and gas well exploitation, so as to achieve the effects of reducing operating time and operating costs, reducing operating risks, and operating safely and smoothly.
Active Publication Date: 2020-09-04
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
Although these methods can continue to extract oil and gas, the methods of pumping or increasing formation pressure increase the operating cost and reduce the production efficiency of oil and gas wells, which will ultimately affect the economic benefits of the entire oil and gas field development
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Embodiment Construction
[0040] The present invention will be further described below in conjunction with accompanying drawing.
[0041] figure 1 A flow diagram of a method for recovering oil and gas according to the present invention is shown. like figure 1 As shown, the oil and gas production method includes the following steps: S1, judging the production of the well; S2, plugging the original production string of the well when the production drops to a predetermined value; S3, running into the original production string The tubing of the string; S4, the bottom of the well is connected with the tubing and used as a production string, so that oil and gas can be ejected through the production string.
[0042] In the early stage of oil and gas production, due to the relatively high formation pressure, oil and gas wells produce through self-spraying. After a period of self-spraying, the energy of the formation decreases. When it drops to the preset value, it is necessary to lower the tubing with a sm...
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The invention provides an oil gas extracting method. The method comprises the following steps: 1) judging well yield; 2) plugging an original production tube column of the well when the yield reduces to a preset value; 3) putting an oil pipe with a diameter less than that of the original production tube column into the original production tube column; and 4) enabling the bottom of the well to be communicated with the oil pipe and used as the production tube column, thereby spraying the oil gas through the production tube column. According to the method, the oil pipe with smaller diameter is inserted into the original production tube column, so as to form a new production tube column, keep the gas-liquid flow rate higher than the critical liquid carrying flow rate and guarantee the self-spraying production of the oil gas well. Besides, before the oil pipe is inserted, the original production tube column is plugged, the wellhead pressure is reduced to normal pressure, the oil pipe with smaller diameter can realize the insertion without pressure and the operation is safe and smooth.
Description
technical field [0001] The invention relates to the technical field of oil and gas field exploitation, in particular to an oil and gas extraction method. Background technique [0002] For oil and gas wells in most oil and gas fields, at the initial stage of production, the formation pressure is high, and the oil and gas production is high. The flow velocity of gas and liquid at the bottom of the production well and in the wellbore exceeds the critical liquid-carrying velocity, and the liquid will be completely absorbed by the gas flow at this time. Carried to the ground, there is no or less fluid accumulation at the bottom of the well, and the oil and gas well can maintain self-flowing production. [0003] In the middle and later stages of production, as the production time prolongs, the formation pressure gradually decreases. Under the condition that the original production string remains unchanged, the oil and gas production will also decrease accordingly, and the flow rat...
Claims
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IPC IPC(8): E21B43/10E21B33/00
CPCE21B33/00E21B43/10
Inventor 石在虹崔斌柯文奇计秉玉苏建政李颖牛骏李孟涛
Owner CHINA PETROLEUM & CHEM CORP