This standard specifies the basic requirements, recommended indicators and analytical methods for water quality testing for clastic reservoirs. This standard applies to the requirements for water quality for different permeable layers in clastic reservoirs and the water quality analysis of water injected into reservoirs. SY/T 5329-1994 Recommended indicators and analytical methods for water quality for clastic reservoirsSY/T5329-1994 Standard download decompression password: www.bzxz.net

Petroleum and Natural Gas Industry Standard of the People's Republic of China SY/T 5329---94
Recommended Indicators and Analysis Methods for Water Quality in Clastic Reservoirs
Published on January 18, 1995
China National Petroleum Corporationwww.bzxz.net
Implementation on July 1, 1995
Subject Content and Scope of Application
Cited Standards
3 Terms and Terminology
4 Recommended Indicators for Water Quality in Reservoir Water Injection
5 Analysis Methods for Water Quality in Reservoir Water Injection
Appendix A Evaluation of Water Source Confirmation Work content for determining injection water quality (supplement) Appendix B
Appendix C
Appendix D
Appendix E
Preparation and calibration of sodium thiosulfate standard solution (supplement) Preparation and calibration of acid indigo carmine solution (supplement) · Preparation and calibration of sulfide standard solution (supplement) · Field hanging plate and test method (reference)
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Petroleum and natural gas industry standard of the People's Republic of China SY/ T 5329-94
Replaces SY5329-88
Recommended indicators and analysis methods for water quality for injection into clastic reservoirs 1 Subject content and scope of application
This standard specifies the basic requirements, recommended indicators and analysis methods for water quality for injection into clastic reservoirs. This standard applies to the requirements of different permeable layers of clastic reservoirs for water quality and water quality analysis of water injected into reservoirs. 2 Reference standards
GB13196 Determination of sulfate in water quality Flame atomic absorption spectrophotometry SY/T5358 Experimental method for evaluating sensitivity of sandstone reservoirs SY5523 Oilfield water analysis method
3 Terms and terms
3.1 Suspended solids: Suspended solids usually refer to substances that are insoluble in water but exist in water and cannot pass through filters. When determining its content, the different pore sizes of the filters used have a great impact on the results of the determination. The suspended solids specified in this standard refer to substances that are insoluble in oil and water on the membrane after filtering with a cellulose microporous membrane with an average pore size of 0.45um and washing the crude oil with gasoline or petroleum ether solvent. 3.2 Median diameter of suspended particles: The median diameter of particles refers to the particle diameter when the cumulative volume of particles in water accounts for 50% of the total volume of particles.
3.3 Oil content: Oil content refers to the petroleum-like substances that can be extracted from water by gasoline or petroleum ether under acidic conditions.
3.4 ​​Iron bacteria: A group of bacteria that can obtain energy from oxidizing divalent iron. The iron hydroxide formed can be stored inside or outside the bacterial membrane sheath.
3.5 Saprophytic bacteria (TGB): Saprophytic bacteria are "heterotrophic" bacteria. Under certain conditions, they obtain energy from organic matter and produce sticky substances. Accumulated precipitation with certain metabolites can cause blockage. 3.6 Sulfate-reducing bacteria (SRB): Sulfate-reducing bacteria refer to a type of bacteria that can reduce sulfate ions to divalent sulfur ions under certain conditions and then form byproduct hydrogen sulfide, which has a great corrosive effect on metals. The precipitation of iron sulfide produced in the corrosion reaction can cause blockage.
4 Recommended indicators for water quality of reservoir injection
4.1 Basic requirements for water quality
a. The water quality is stable and does not produce precipitation when mixed with oil layer water; b. The water does not cause hydration of clay minerals after being injected into the oil layer. expansion or suspension; c. The water must not carry a large amount of suspended matter to prevent clogging of the percolation end face and seepage channels of the injection well; d. Low corrosion to injection facilities;
e. When two water sources are used for mixed water injection, indoor experiments should be carried out first to confirm that the two waters have good compatibility and are harmless to the oil layer before injection;
f. Evaluation of injection water sources to determine the injection water quality should be carried out in accordance with the requirements of Appendix A (Supplement). 4.2 Recommended water quality main control indicators are shown in Table 1) China National Petroleum Corporation approved on January 18, 1995 and implemented on July 1, 1995
Average air in the injected layer
Permeability m2
Standard classification
Suspended solid content, mg/ L
Diameter of suspended particles
Median value, um
Oil content, mg/ L
Average corrosion rate, mm/a
Pitting corrosion
SRB bacteria, pieces/mL
Iron bacteria, pieces/mL
Saprophytic bacteria, pieces/mL
Note: T1
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