A unit design method for irregular injection-production well patterns in heterogeneous reservoirs
A technology for heterogeneous oil reservoirs and injection-production wells, which is applied in the fields of fluid production, earth-moving drilling and production, wellbore/well components, etc. It can solve the characteristics and complex operation procedures considering the heterogeneity of reservoir rock and fluid parameters. and other problems to achieve the effect of improving design efficiency
Active Publication Date: 2019-02-22
CHINA UNIV OF PETROLEUM (EAST CHINA)
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[0003] To sum up, for the design of well spacing in each injection-production direction in heterogeneous reservoir well groups, the existing well spacing design methods cannot fully and quantitatively consider the characteristics of reservoir rock and fluid parameter heterogeneity. On the other hand, the operation process is more complicated, requiring personnel to have a high reserve of oilfield development knowledge
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[0020] like Figure 1a ~ Figure 1e , figure 2 , image 3 As shown, a method for designing irregular injection-production well pattern units in heterogeneous reservoirs, the steps are as follows:
[0021] Step 1. Collect and organize the geological data and development data of the reservoir
[0022] The geological data include reservoir permeability distribution K(x,y,z), porosity distribution φ(x,y,z), initial water saturation distribution S w (x,y,z), crude oil viscosity μ o , Formation water viscosity μ w , oil-water relative permeability curve; the development data include the designed production life T of the reservoir, the target water saturation
[0023] Step 2. Virtual deployment of regular injection-production well pattern units and equivalent treatment unit heterogeneity parameters
[0024] Specific steps are as follows:
[0025] S201. Virtually deploy regular injection-production well pattern units, and determine injection-production control units: accordin...
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The invention belongs to the field of oil-gas field development, and relates to the technical field of reservoir waterflooding scheme adjustment, in particular to a design method for irregular injection-production well network units of a heterogeneous reservoir. The method includes the steps of 1, collecting and sorting the geological data and development data of the reservoir; 2, carrying out virtual deployment of regular injection-production well network units, and carrying out equivalent processing of unit heterogeneity parameters; 3, determining the reasonable inter-well distance in the direction of each injection-production connecting line of the injection-production well network units; 4, deploying and adjusting the locations of injection-production wells of the irregular injection-production well network units. Compared with the prior art, the method has the advantages that by fully considering the heterogeneity of reservoir rock and fluid parameters in each injection-productiondirection of the well group, the reasonable inter-well distance in the direction of each injection-production connecting line in the well group of the heterogeneous reservoir can be easily and quickly determined, which is beneficial to improving the efficiency of designing the irregular injection-production well network units.
Description
technical field [0001] The invention belongs to the category of oil and gas field development, relates to the technical field of reservoir scheme adjustment for water injection development, in particular to a method for designing irregular injection-production well pattern units of heterogeneous reservoirs. Background technique [0002] In actual reservoirs, due to the ubiquity of heterogeneity, the degree of displacement of injected water in a certain direction is high, resulting in unbalanced displacement. In order to alleviate the unbalanced displacement, in the design of well spacing, the well spacing in the direction of high displacement degree can be appropriately increased, the well spacing in the direction of low displacement degree can be reduced, and irregular well groups can be formed to achieve maximum balance to displace. Through searching the prior art, the patent of invention with the publication number CN101270654A discloses a well location deployment method...
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IPC IPC(8): E21B43/30
CPCE21B43/30
Inventor 冯其红张先敏胡鹏陈红伟吴浩宇谷建伟马志宇
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)