Oil increment evaluation method for a polymer microsphere deep profile control and flooding technology of a low-permeability reservoir
An evaluation method and polymer technology, applied in earthwork drilling, wellbore/well components, instruments, etc., can solve the problems of not considering the natural decline of reservoirs, and it is difficult to objectively reflect the oil increase, so as to achieve more convincing data Effect
Inactive Publication Date: 2019-05-31
PETROCHINA CO LTD
View PDF1 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the traditional method for evaluating the effect of profile control measures still adopts the algorithm of net oil increase, that is, the production after the measures minus the production before the measures is used as the oil volume increased by profile control. Correspondingly, without considering the natural decline of oil reservoirs, it is difficult to objectively reflect the real oil increment
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 1
[0045]Example 1: In December 2017, polymer microsphere control and flooding was implemented in a certain ultra-low permeability oilfield block. The production data is shown in Table 1. According to the evaluation method of the present invention, the monthly production curve of the first 7 months of control and flooding was drawn, and the data were analyzed. Fitting, predicting the oil production after the control and flooding, and comparing it with the actual oil production, and calculating the oil increase after the control and flooding.
[0046] Table 1 Production data of a block in a low permeability oilfield
[0047]
[0048]
[0049] S1, such as figure 1 , draw the daily oil production-year-month relationship curve according to the block production data.
[0050] In the curve, the abscissa represents the production year and month of the block, and the ordinate represents the monthly average daily oil production of the block. Based on the actual production of the bl...
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 discloses an oil increment evaluation method for a polymer microsphere deep profile control and flooding technology of a low-permeability reservoir. The method comprises the following steps: drawing an actual daily oil production curve of a polymer microsphere profile control and flooding implementation region; Carrying out progressive decrease prediction after profile control and flooding by utilizing the progressive decrease trend of the polymer microsphere profile control and flooding implementation area; And comparing the relationship between the actual daily oil yield and the predicted daily oil yield after implementation of profile control and flooding, calculating the oil increment and evaluating the implementation effect. According to the method, the relation betweenthe actual daily oil yield and the predicted daily oil yield can be reflected more visually after the profile control and flooding measures are implemented, and then the effects after the profile control and flooding measures are evaluated objectively. Meanwhile, the oil increment calculated through the method better conforms to the decreasing rule of oil field development, and data are more convincing.
Description
technical field [0001] The invention belongs to the technical field of oil reservoir evaluation, and in particular relates to an evaluation method for oil increment of polymer microsphere deep control and displacement technology in low-permeability oil reservoirs. Background technique [0002] Reservoirs in ultra-low permeability oilfields are tight, with low permeability, generally less than 10md, and pore-throat size in the order of nanometers and microns. After the ultra-low permeability oilfield enters the high water cut period, it is necessary to develop enhanced oil recovery technology, which is of great significance for controlling the rising rate of water cut, fully producing the remaining oil, and ensuring the continuous and stable production of the oilfield. [0003] Restricted by reservoir conditions, ultra-low permeability oilfields have greater decline and serious production losses with the extension of development time. Due to the small particle size of the po...
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 IPC IPC(8): G06Q10/04G06Q50/02E21B43/22
Inventor 周广卿何治武易萍贾玉琴薛芳芳王大伟程辰马波任建科朱家杰
Owner PETROCHINA CO LTD