SY/T 6334-2024 Specifications for the acidizing design, treatment and evaluation of oil well & water injection 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 6334-2024
Replaces SY/T 6334-2013
Specifications for the acidizing design, treatment and evaluation of oil well & water injection well
油水井酸化设计、施工及评价规范
(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 General Principles and Requirements
5 Installation Requirements
6 Marker Content
7 Fabrication and Installation
8 Maintenance and Management
Appendix A (Informative) Pipeline Marker Reference Forms and Specifications
Specification for Acidizing Design, Construction, and Evaluation of Oil and Water Wells
1 Scope
This document specifies the technical requirements for the process design, construction, evaluation, and health, safety, and environmental control of matrix acidizing in oil and water wells.
This document is applicable to the design, construction, and evaluation of acidizing operations in onshore oil and water wells. Offshore oilfields may selectively refer to it.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute indispensable provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
HG/T 2701 Rubber element of compression type packers
SY/T 5211 Petroleum drilling and production equipment — Fracturing complete unit
SY/T 5225 Safety production technology regulations for fire and explosion prevention in petroleum drilling, development, and storage
SY/T 5280 General technical conditions for crude oil demulsifiers
SY/T 5358 Laboratory evaluation method of flow velocity sensitivity for reservoir
SY/T 5405 Test method and evaluation index of corrosion inhibitors for acidification
SY/T 5587.4 Code for conventional workover job — Part 4: Locating channeling and leakage, sealing channeling and plugging leakage
SY/T 5587.5 Code for conventional workover job — Part 5: Wellbore preparation for downhole operation
SY/T 5727 Safety code for downhole operation
SY/T 5753 Evaluation method for performance of surfactants used for oil well acidizing and water well stimulation
SY/T 5754 Evaluation method for performance of mutual solvents used in oilfield acidizing
SY/T 5755 Evaluation method for performance of clean-up additives used in fracturing and acidizing
SY/T 5849 Evaluation method for plug removal effect of chemicals in oil and water wells
SY/T 5886 Evaluation method for performance of acidizing working fluids
SY/T 5952 Legend of downhole process pipe string tools for oil, gas, and water wells
SY/T 5971 Evaluation method for performance of clay stabilizer used in fracturing, acidizing and water injection of oil and gas fields
SY/T 6214 Thickener for gelled acid
SY/T 6270 Petroleum drilling and production equipment — Usage and maintenance of cementing and fracturing manifolds
SY/T 6277 Specification for personal protection in hydrogen sulfide environment
SY/T 6526 Determination method for dynamic reaction rate of hydrochloric acid with carbonate rock
SY/T 6571 Evaluation method for performance of iron stabilizer in acidizing
SY/T 6610 Safety specification for downhole operation site in hydrogen sulfide environment
SY/T 6690 Technical code for well control in downhole operation
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
pad fluid
A treatment fluid system used during acidizing for pretreating the reservoir, aiming to avoid secondary precipitation or remove organic blockages, etc. If acid is added to the pad fluid, it is called pad acid.
3.2
main treating acid
The acid used during acidizing to dissolve reservoir rock and plugging materials.
3.3
postpositional fluid
A treatment fluid system injected after the main treating acid during acidizing to ensure or enhance the acidizing effect. If acid is added to the postpositional fluid to maintain acidic conditions in the treated interval and avoid secondary precipitation, it is called postpositional acid.
3.4
peak shear viscosity
The highest viscosity value measured using a rotational viscometer after the diverting acid fluid has thickened.
4 Oil and Water Well Acidizing Design
4.1 Types of Data to be Collected Before Acidizing
4.1.1 Structural Data
Includes the structural location of the oil/water well, fault distribution and sealing properties, and characteristics of oil, gas, and water distribution.
4.1.2 Seismic Data
Includes relevant data from seismic processing and interpretation, fault conditions and throw, in-situ stress orientation, degree and distribution of natural fractures.
4.1.3 Drilling and Completion Data
Includes changes in drilling rate, mud losses, kicks, and overflow during drilling; drilling fluid type, density, and viscosity used when drilling the target zone; drilling/completion fluid loss volume and loss control material usage; wellbore trajectory; casing grade, material, outer diameter, wall thickness, setting depth, internal pressure resistance, coupling position, pressure test data, casing condition; cement top, cementing quality, current artificial bottom hole; completion method, completion wellhead, wellbore configuration, completion string diagram; perforation data, horizontal well lateral length, reservoir encounter rate of horizontal wells, screen type and parameters.
4.1.4 Logging Data
Includes relevant data from cuttings logging and gas logging for the interval to be treated and the upper and lower barriers, lithology, and characteristics indicating oil and gas shows.
4.1.5 Well Log Data
Includes conventional well logs and special well log data. Electrical properties, physical properties, natural fractures, and in-situ stress related data for each layer.
4.1.6 Core Data
Includes physical property analysis data for the interval to be treated and the upper and lower barriers, thin section identification, various mineral components of the rock, cementation type, cement composition, microstructure, sensitivity experimental data, relative permeability characteristics, rock mechanics, and in-situ stress parameters.
4.1.7 Reservoir Fluid Data
Includes viscosity, density, composition, gas-oil ratio, water type, salinity, pour point, wax content, sulfur content, resin/asphaltene content of reservoir oil, gas, and water, and relevant data on special fluids.
4.1.8 Conventional Production Test Data
Includes production test date, method, zone and interval, working system, daily production rate (oil, gas, water).
4.1.9 Reservoir Testing and Production Testing Data
Includes static pressure, flowing pressure, reservoir temperature, skin factor, effective permeability, drainage radius obtained through reservoir testing methods, and fluid entry profile and injection profile data obtained through production testing.
4.1.10 Reservoir Damage Data
Includes the cause, type, degree, and zone of reservoir damage.
