SY/T 5183-2024 Evaluation methods for sand control effect of oil well English, Anglais, Englisch, Inglés, えいご
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ICS
E
Professional standard of the People's Republic of China
SY/T 5183-2024
Replaces SY/T 5183-2016
Evaluation methods for sand control effect of oil well
油井防砂效果评价方法
(English Translation)
Issue date: 2024-12-25 Implementation date: 2025-06-25
Issued by National Development and Reform Commission, P.R.C
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Value Determination Provisions
5 Evaluation of Sand Control Effectiveness
Evaluation Method for Sand Control Effect in Oil Wells
1 Scope
This document specifies the numerical calculation and value determination requirements for production rate, fluid productivity index, and effective period before and after sand control in individual oil wells, as well as the evaluation method for sand control effectiveness.
This document applies to the evaluation of sand control measures primarily aimed at preventing formation fines from migrating into the wellbore.
2 Normative References
The following documents contain provisions which, through normative reference in this text, constitute essential provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
SY/T 6366 Main production technical indicators and calculation methods for oilfield development
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
initial sand control
Sand control measures implemented before the oil well is put into production, with the primary process aimed at preventing formation fines from migrating into the wellbore. This includes new wells in new layers and old wells in new layers.
3.2
post-production sand control
Sand control measures implemented when an oil well cannot produce normally due to sand production after being put into operation, with the primary process aimed at preventing formation fines from migrating into the wellbore.
3.3
sand control with chemical
A sand control method involving the injection of chemicals or coated sand into the near-wellbore area to consolidate the wellbore wall or establish an artificial wellbore wall. Includes, but is not limited to, sand consolidation agents, resin solution-type sand consolidation agents, and coated sand.
3.4
screen pipe sand control
A sand control method performed within the wellbore by solely hanging a screen pipe or filter tube without gravel packing. Includes, but is not limited to, open-hole screen completion and sand control by hanging screen pipes inside the casing.
3.5
gravel packing for sand control
A sand control method combining the placement of an artificial gravel pack in the near-wellbore area to form a formation sand barrier with a sand barrier provided by a screen pipe or filter tube inside the wellbore. Includes, but is not limited to, circulating gravel packing, squeeze packing, and frac-packing.
4 Value Determination Provisions
4.1 Production Rate
4.1.1 The daily production rate before sand control for initial sand control wells is calculated based on the daily target liquid (or oil) production rate (unit: tons per day).
4.1.2 The daily production rate after sand control for initial sand control wells is calculated as the average daily liquid (or oil) production rate (unit: tons per day) over 30 consecutive days starting from the 21st day after being put into production.
4.1.3 The fluid productivity index before sand control for post-production sand control wells is calculated based on the average daily liquid (or oil) production rate (unit: tons per day) over the last 30 days of the stable production period before well shutdown or cessation of production.
4.1.4 The fluid productivity index after sand control for post-production sand control wells is calculated as the average daily liquid (or oil) production rate (unit: tons per day) over 30 consecutive days starting from the 21st day after being put into production.
4.2 Effective Period
4.2.1 For chemical sand control, the effective period is the cumulative production time (unit: days) after the measure is implemented, during which the sand content in the produced fluid from the oil well is less than 0.03% (volume fraction).
4.2.2 For screen pipe sand control, the effective period is the cumulative production time (unit: days) after the measure is implemented, during which the diameter of solid particles in the produced fluid from the oil well is less than the sand retention precision of the screen pipe.
4.2.3 For gravel packing sand control, the effective period is the cumulative production time (unit: days) after the measure is implemented, during which the diameter of solid particles in the produced fluid from the oil well is less than 1/4 of the median gravel size of the packed gravel.
4.3 Fluid Productivity Index
Shall be implemented according to the relevant provisions of SY/T 6366.
5 Evaluation of Sand Control Effectiveness
5.1 Evaluation of Initial Sand Control Effectiveness for Individual Wells
The sand control effectiveness for individual wells with initial sand control is comprehensively evaluated using two indicators, with each individual evaluation expressed as a score. The evaluation indicators and scores for individual initial sand control wells in waterflood reservoirs, polymerflood reservoirs, cold heavy oil production reservoirs, and thermal heavy oil production reservoirs are shown in Tables 1 to 4, respectively.
5.2 Evaluation of Post-Production Sand Control Effectiveness for Individual Wells
The sand control effectiveness for individual wells with post-production sand control is comprehensively evaluated using two indicators, with each individual evaluation expressed as a score. The evaluation indicators and scores for individual post-production sand control wells in waterflood reservoirs, polymerflood reservoirs, cold heavy oil production reservoirs, and thermal heavy oil production reservoirs are shown in Tables 5 to 8, respectively.
5.3 Economic Benefit Evaluation of Sand Control Measures in Oil Wells
The economic benefit evaluation of sand control measures in oil wells is shown in Table 9. Among them:
a) The benefit ratio calculation for initial sand control is shown in Formula (1):
b) The benefit ratio calculation for post-production sand control is shown in Formula (2):
Example 1:
A new well has a designed daily target production rate of 3 tons/day. Before being put into production, chemical sand control is implemented, costing approximately 300,000 yuan. After the sand control measure, the average daily production rate is 4.6 tons/day. It fails after producing for 200 days in the first year. The crude oil price is 2800 yuan/ton, and the operating cost is 245 yuan/ton. Calculate the benefit ratio:
