A New Method for Estimation and Calculation of Economic Limit Drilling Potential and Recovery Ratio in Mature Oilfields
A technology of economic limit and recovery rate, applied in earthwork drilling, measurement, wellbore/well components, etc., can solve the problem of failure to consider economic factors, unable to effectively guide the development and production practice of old oilfields in the ultra-high water cut period, and mine field guidance Issues such as weak sex
Active Publication Date: 2021-11-16
CHINA PETROLEUM & CHEM CORP +1
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Second, the calculation formula of the traditional method only involves reservoir geology and development parameters, without considering the influence of economic factors, and has little guidance for the actual operation of the mine
Third, there are contradictions between the calculation results of traditional methods and the actual development and production conditions. For example, the well pattern density of some ultra-high water-cut reservoirs has exceeded the limit well pattern density, but it still has development benefits.
It can be seen that the traditional method can no longer effectively guide the development and production practice of mature oilfields in the ultra-high water-cut period
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0027] In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments are listed below and shown in the accompanying drawings in detail as follows.
[0028] Step 1. Determine the economic limit recoverable reserves of a new drilling single well. The dynamic cash flow method is used to establish the chart of the relationship between single well economic limit recoverable reserves and oil price, so as to determine the economic limit recoverable reserves of new drilling wells at a certain oil price and a certain drilling depth.
[0029] Step 2, determine the recovery factor of the new drilling. Calculate the newly drilled recoverable reserves of development units or oilfields in recent years; use Tong Xianzhang’s water-driven reserve formula N d =7.5 / B (coefficient B is the slope of the Type A water drive characteristic curve), calculate the actual water drive reserves of the new drilling; calculate t...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a new method for measuring and calculating the economic limit drilling potential and recovery factor of an old oil field. The new method for calculating the economic limit drilling potential and recovery rate of an old oil field comprises: step 1, determining the economic limit recoverable reserves of a new drilling single well; 2. Determine the recovery rate of the new drilling; Step 3, determine the geological reserves of the new drilling single well control economic limit; Step 4, calculate the new drilling potential of the economic limit; Step 5, calculate the economic limit recovery. The new method for calculating the economic limit drilling potential and recovery rate of the old oilfield overcomes the contradiction of the traditional method in the late application of ultra-high water-cut development, and can meet the calculation of the economic limit new drilling potential and economic limit recovery rate of the ultra-high water-cut reservoir needs. Therefore, it is possible to more objectively evaluate the reservoir development potential and guide the practice of oilfield development and production.
Description
technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a new method for measuring and calculating the economic limit drilling potential and recovery factor of an old oil field. Background technique [0002] At present, the new drilling potential of oilfields commonly used in mines is generally calculated by using the "relationship between well pattern density and recovery factor". This relational formula is an empirical formula obtained by regression of some development units with simple structure, large oil-bearing area and high permeability, such as Shengtuo and Gudao, as sample points, namely [0003] [0004] in: [0005] E. R — recovery factor, decimal; [0006] K e —effective permeability, μm 2 ; [0007] mu o - Formation crude oil viscosity, mPa s; [0008] n—well pattern density, well / km 2 ; [0009] This method has a good guiding effect on the infill adjustment of oilfields in the middle an...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/00
CPCE21B47/00
Inventor 肖武张孝天张海燕赵小军海会荣王华张以根魏新辉张超
Owner CHINA PETROLEUM & CHEM CORP