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Oil deposit development production optimization method and system based on connectivity method

A technology of reservoir development and optimization method, which is applied in the direction of design optimization/simulation, production fluid, earthwork drilling and production, etc., can solve problems such as optimization and improvement of reservoir production plan, achieve the effect of reducing water and increasing oil, improving water injection efficiency, Accurate saturation tracking and calculations yield dynamic results

Active Publication Date: 2018-11-23
YANGTZE UNIVERSITY
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  • Application Information

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Problems solved by technology

However, when the current connectivity model is used to predict the oil-water dynamics of complex reservoirs, the saturation tracking method has not been applied to the optimization plan of reservoir layered injection and production, so it is impossible to effectively optimize and improve the current reservoir production plan to improve reservoir production. efficiency

Method used

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  • Oil deposit development production optimization method and system based on connectivity method
  • Oil deposit development production optimization method and system based on connectivity method
  • Oil deposit development production optimization method and system based on connectivity method

Examples

Experimental program
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Effect test

Embodiment 2

[0154] Example 2 With the help of reservoir numerical simulation technology, a positive-rhythm oil reservoir with high permeability zones with grid division of 21×21×2 was constructed. The grid size is DX=DY=20m, DZ=10m, and there are 9 wells in the reservoir 5 injection and 4 production, separate injection and combined production, the permeability field distribution is as follows Figure 5a , Figure 5b As shown, the initial reservoir saturation is 0.2, and the oil-water viscosities are 1.0 and 20.0 mPa·s, respectively. The production dynamic simulation calculation of the reservoir was carried out by using mature digital simulation software. The simulated production time was 900 days, the overall injection-production balance of the reservoir was achieved, and the water cut of the final block reached 82.0%.

[0155] Using inter-well connectivity of multi-layer reservoirs to simulate the production performance in the first 900 days, it takes 0.22 seconds for one calculation, w...

Embodiment 3

[0159] Example 3 involves an overseas multi-layer water flooding oil field. 12 wells in an experimental area have 6 injections and 6 productions. Simulation calculations are carried out. The reservoir is divided into three layers in total, with separate injection and production. Through automatic history matching, the previous 2011 days, Invert model parameters, output information such as water injection splitting and oil displacement efficiency at the last moment, and then adjust the reservoir development plan.

[0160] The historical fitting of cumulative oil production and water cut production dynamics in the block is as follows: Figure 13a , Figure 13b As shown, the figure shows that the oil-water dynamics of the reservoir have been well fitted, and the fitting correlation coefficient has reached more than 95%. At the same time, according to the parameter field results after inversion, the simulation outputs the water injection splitting information of each layer at the...

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Abstract

The invention relates to a production method of an oil deposit, in particular to an oil deposit development production optimization method and system based on a connectivity method. The method comprises the steps that saturation calculation is conducted by taking inter-shaft communication units as objects to establish a precise front edge tracking method to obtain oil-water dual-phase production dynamics of each layer at shafts; information of inter-shaft conductivity, flow splitting, water injection efficiency and the like is obtained by inverting connectivity model parameters though automatically fitting oil deposit historical dynamics, and the information is taken as the basis to perform layered dynamic production allocation and injection allocation automatic optimizing design on the oil deposit through iterative computation to reduce low-efficiency water drive direction flow and improve injection-exploitation conflict. Application examples show that the method can perform rapid computation, accurate saturation tracking and production dynamics computation, an obtained layered water injection scheme can well achieve a water reducing and oil increasing effect, 50,000 cubic metersof predicted oil increasing after actual optimization of the oil deposit is conducted is achieved, and a novel idea for performing real-time optimization on an oil field injection-exploitation schemeis provided.

Description

technical field [0001] The invention relates to an oil reservoir production method, in particular to an oil reservoir development and production optimization method and system based on a connectivity method. Background technique [0002] 90% of my country's crude oil reserves are stored in clastic rock reservoirs. Due to the large vertical span and strong heterogeneity, the contradiction between layers is prominent. Layered water injection is an important measure to reduce interlayer conflicts and increase and stabilize production. At present, the oilfield field has initially realized layered real-time measurement and adjustment technology. However, the design method of stratified water injection scheme for reservoirs needs to be studied urgently. Only by realizing the simultaneous development of water injection scheme and supporting technology can it better meet the actual field application. [0003] The optimal design of artificial water injection schemes mainly relies on...

Claims

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Application Information

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IPC IPC(8): E21B43/20E21B49/00G06F17/50
CPCE21B43/20E21B49/00G06F30/20
Inventor 赵辉曹琳李国浩史永波刘伟
Owner YANGTZE UNIVERSITY
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