CN-121993086-A - Water plugging and profile control method and related equipment for horizontal well group

CN121993086ACN 121993086 ACN121993086 ACN 121993086ACN-121993086-A

Abstract

The application discloses a water plugging and profile control method for a horizontal well group and related equipment, and relates to the technical field of oil and gas exploitation, wherein the method comprises the steps of determining the horizontal well group with water content higher than preset water content in a target oil field area as a first horizontal well group; the method comprises the steps of selecting a horizontal well group with a well completion mode and well conditions meeting preset requirements from a first horizontal well group based on a target water shutoff profile control process, determining the horizontal well group as a second horizontal well group, screening a third horizontal well group in the second horizontal well group according to the residual water flooding recoverable reserves of the second horizontal well group, and performing water shutoff profile control processing according to the target water shutoff profile control process aiming at the target horizontal well group with a permeability association coefficient larger than a preset association coefficient in the third horizontal well group. According to the method, the target horizontal well group meeting the conditions is gradually screened out through multidimensional screening standards such as the water content, the well completion mode, the well condition, the residual water flooding recoverable reserves and the permeability correlation coefficient, so that the well group which is finally subjected to water shutoff profile control treatment is ensured to have higher potential and pertinence, blind selection is avoided, and unnecessary operation cost is reduced.

Inventors

CHEN YIHANG
HE WENYUAN
HU DANDAN
WU YUANBING
LI QIANYAO
Li Menhuan

Assignees

中国石油天然气集团有限公司
中国石油国际勘探开发有限公司

Dates

Publication Date: 20260508
Application Date: 20241105

Claims (10)

1. A water shutoff and profile control method for a horizontal well group, comprising the steps of: Determining a horizontal well group with the water content higher than the preset water content in a target oil field area as a first horizontal well group; Selecting a horizontal well group with a well completion mode and well conditions meeting preset requirements from the first horizontal well group based on a target water shutoff profile control process, and determining the horizontal well group as a second horizontal well group; screening a third horizontal well group in the second horizontal well group according to the residual water flooding recoverable reserves of the second horizontal well group; and aiming at the target horizontal well group with the permeability association coefficient larger than the preset association coefficient in the third horizontal well group, performing water shutoff and profile control treatment according to the target water shutoff and profile control process.
2. The horizontal well group water shutoff and profile control method of claim 1, wherein prior to screening out a third horizontal well group of the second horizontal well group based on remaining water flooding recoverable reserves of the second horizontal well group, the horizontal well group water shutoff and profile control method further comprises: Drawing a water drive characteristic curve according to the accumulated oil yield, the accumulated water injection amount and the water content of the second horizontal well group; determining the current accumulated oil production and economic limit oil production of the second horizontal well group according to the water flooding characteristic curve; And calculating the difference value between the economic limit oil production and the current accumulated oil production to obtain the residual water flooding recoverable reserves of the second horizontal well group.
3. The method of plugging and profile control for a horizontal well group according to claim 1, wherein the screening a third horizontal well group of the second horizontal well group according to the remaining water flooding recoverable reserves of the second horizontal well group comprises: and determining the horizontal well group with the residual water flooding recoverable reserve larger than the preset recoverable reserve in the second horizontal well group as the third horizontal well group.
4. The method of plugging and profile control for a horizontal well group according to claim 1, wherein the screening a third horizontal well group of the second horizontal well group according to the remaining water flooding recoverable reserves of the second horizontal well group comprises: Determining a horizontal well group with residual water flooding recoverable reserves larger than preset reserves in the second horizontal well group as a fourth horizontal well group; And determining a horizontal well group with expected production less than preset production in the fourth horizontal well group as the third horizontal well group.
5. The method for plugging and profile control of horizontal well groups according to claim 1, wherein the selecting a horizontal well group with a completion mode and well conditions meeting preset requirements from the first horizontal well group based on the target plugging and profile control process, and determining the horizontal well group as a second horizontal well group comprises: When the target water shutoff profile control process is a chemical water shutoff profile control process, determining a horizontal well group which is selected from the first horizontal well group as a screen pipe well completion mode and has a bottom hole flow pressure greater than a first preset pressure value as the second horizontal well group; And when the target water shutoff and profile control process is a physical water shutoff and profile control process, determining a horizontal well group which is selected from the first horizontal well group as an open hole well completion mode and has a bottom hole flow pressure greater than a second preset pressure value as the second horizontal well group, wherein the second preset pressure value is greater than the first preset pressure value.
6. The water shutoff and profile control method of any of claims 1 through 5, wherein prior to performing a water shutoff and profile control treatment in accordance with the target water shutoff and profile control process for a target horizontal well group in which a permeability association coefficient in the third horizontal well group is greater than a preset association coefficient, the water shutoff and profile control method of the horizontal well group further comprises: And determining the permeability association coefficient of the third horizontal well group according to the permeability, the length of the well section and the distance between the well sections of the production well section and the water injection well section in the third horizontal well group.
7. The method of plugging and profiling a horizontal well group according to claim 1, wherein determining the permeability correlation coefficient of the third horizontal well group according to the permeability, the length of the well section and the distance between the well sections of the production well section and the water injection well section in the third horizontal well group comprises: calculating the ratio of the permeability of a well section pair to the average value of the permeability harmony to obtain a first ratio, wherein the well section pair comprises the production well section and the water injection well section; Calculating the ratio of the product of the length of the well section pair to the distance between the well sections to obtain a second ratio; determining the product of the first ratio and the second ratio as a connectivity parameter of the well section pair; and accumulating the connectivity parameters of all the well section pairs in the third horizontal well group to obtain the permeability association coefficient of the third horizontal well group.
8. A water shutoff and profile control device for a horizontal well group, comprising: The first screening unit is used for determining a horizontal well group with the water content higher than the preset water content in the target oil field area as a first horizontal well group; The second screening unit is used for selecting a horizontal well group with a well completion mode and well conditions meeting preset requirements from the first horizontal well group based on a target water shutoff profile control process, and determining the horizontal well group as a second horizontal well group; The third screening unit is used for screening a third horizontal well group in the second horizontal well group according to the residual water flooding recoverable reserves of the second horizontal well group; And the water shutoff and profile control unit is used for performing water shutoff and profile control treatment according to the target water shutoff and profile control process aiming at the target horizontal well group with the permeability association coefficient larger than the preset association coefficient in the third horizontal well group.
9. An electronic device comprising a memory and a processor, characterized in that the processor is adapted to carry out the steps of the horizontal well group water shutoff profile control method as claimed in any of claims 1-7 when executing a computer program stored in the memory.
10. A computer readable storage medium having stored thereon a computer program, which when executed by a processor, implements the steps of the horizontal well group water shut-off profile control method according to any one of claims 1-7.

Description

Water plugging and profile control method and related equipment for horizontal well group Technical Field The application relates to the technical field of oil and gas exploitation, in particular to a water plugging profile control method of a horizontal well group and related equipment. Background Along with the continuous progress of oil field development technology, the water shutoff profile control technology is used as a key means for improving the unbalance of the oil well profile and the oil field recovery ratio, and is widely applied to oil and gas field development. However, the complex geological structure and flooding conditions of the horizontal well pattern make it particularly difficult to accurately select a target well group when performing water shutoff profile control. Therefore, the research and the development and the application of the water shutoff profile control well selection technology in the horizontal well pattern are particularly important. In the prior art, the injection section test result is usually adopted to select the target well, but the test data is relatively deficient due to the higher difficulty of the test of the production section in the horizontal well production, and the well selection method depending on the test data has limitations. Meanwhile, the profile of the horizontal well is greatly influenced by the physical property difference along the way, and the phenomenon that the high permeable layer is seriously flooded and the low permeable layer is not effectively developed in part of the well Duan Yi, so that the profile is seriously unbalanced. In the prior art, in the water shutoff profile control well selection process, the well selection accuracy is not high, and the implementation effect of water shutoff profile control is affected. That is, the prior art has the technical problems that the water shutoff profile control well selection method is not accurate enough and the screening dimension of the well group is single. Disclosure of Invention In the summary of the application, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description section. The summary of the application is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter. According to the water plugging profile control method and the related device for the horizontal well group, provided by the application, the target horizontal well group meeting the conditions can be gradually screened out through the multi-dimensional screening standards such as the water content, the well completion mode, the well condition, the residual water flooding recoverable reserves, the permeability association coefficient and the like, so that the well group which is subjected to water plugging profile control treatment finally has higher potential and pertinence, blind selection is avoided, and unnecessary operation cost is reduced. The application provides a water plugging and profile control method for a horizontal well group, which comprises the steps of determining the horizontal well group with water content higher than preset water content in a target oil field area as a first horizontal well group, selecting the horizontal well group with a well completion mode and well conditions meeting preset requirements from the first horizontal well group based on a target water plugging and profile control process to determine the horizontal well group as a second horizontal well group, screening a third horizontal well group in the second horizontal well group according to residual water flooding recoverable reserves of the second horizontal well group, and performing water plugging and profile control treatment according to the target water plugging and profile control process aiming at the target horizontal well group with the permeability association coefficient in the third horizontal well group being larger than the preset association coefficient. In a possible implementation manner, before screening out a third horizontal well group in the second horizontal well group according to the residual water flooding recoverable oil yield of the second horizontal well group, the water plugging profile control method of the horizontal well group further comprises the steps of drawing a water flooding characteristic curve according to the accumulated oil yield, the accumulated water injection amount and the water content of the second horizontal well group, determining the current accumulated oil yield and the economic limit oil yield of the second horizontal well group according to the water flooding characteristic curve, and calculating the difference value between the economic limit oil yield and the current accumulated oil yield to obtain the residual water flooding recoverable oil yield of the second horizontal well