Природный асфальт, как «гилсонит», используется в нефтегазовой промышленности

Product Overview

Description

General description cementing additive in oil and gas

Gilsonite in oil and gas well cementing is a highly developed technology. Cement-water slurries, with or without various additives, have been used for many years in cementing procedures carried out from time to time during the drilling of the productive life of a well. Cementing is often applied during drilling and completion procedures in connection with protection of production zones, isolation and confinement of water zones, support of bore hole wall, anchorage of casing,and control of lost circulation not overcome by methods associated with the circulation of drilling mud. Such cementing procedures by gilsonite additives are ordinarily regarded as being of primary character.

Particle size of cementing additive in oil and gas

Particle size and particle size distribution of the gilsonite determine the strength and porosity-permeability characteristics of the set cement for any given mix ratio. Where maximum strength is desirable, a coarse natural asphalt where lightest weight and lowest porosity-permeability are important and strength is to be sacrificed or is of little importance, an aggregate of minus 50 mesh or finer may be used.

Usage cementing additive in oil and gas

Gilsonite should be realized that there are various classes with respect to melting points. The lower the melt point, the faster the gilsonite will dissolve in a solvent therefor or soften under conditions of heat. Therefore, the use of gilsonite in an oil and gas well cementing composition affords an opportunity to select a class of that material which best serves the particular purpose.The heat softening characteristic of gilsonite becomes of particular importance in instances of relatively high bottom hole temperatures, where there is a tendency for the gilsonite to soften and diffuse into the surrounding cement.

With blending of gilsonite with other drilling mud additives increase performance in cementing and drilling fluids in a way no other single additive can.gilsonite, the recognized industry standard for filtration control, is equally effective at controlling lost circulation and improving wellbore stability.

Gilsonite has significant health, safety and environmental (HSE) advantages over synthetic products.

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  Non-toxic

  
  


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  Non-carcinogenic

  
  


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  Non-mutagenic

  
  

Cementing advantage

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  Strengthens cement bonds to shales and sands

  
  


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  Reduces cement slurry density

  
  


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  Prevents lost circulation

  
  


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  Supports compressive strength development

  
  

Drilling fluids advantage

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  Provides superior shale stabilization

  
  


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  Prevents differential sticking

  
  


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  Reduces or eliminates lost circulation

  
  


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  Provides wellbore strengthening matrix

  
  

Formula of mixture by gilsonit

Packing of powder form micronized

lump form like rock packed in 500~1000kg jumbo bag

200 mesh packed in 500~1000kg jumbo bag

300 mesh packed in 500~1000kg jumbo bag

30-40 mesh packed in 500~1000kg jumbo bag

100 mesh packed in 500~1000kg jumbo bag

300 mesh packed in 25kg pp bag

200 mesh packed 25kg multi paper bag

200 mesh packed 50lbs multi paper bag

30-40 mesh packed pp bag on pallet

Bulk on vessel

Specification of gilsonite 

TEST METHOD	RESULT	TEST	NO
ASTM-D3174	5	ASH CONTENT,WT%	1
ASTM-D3173	1%	MOISTURE CONTENT,WT%	2
ASTM-D3175	63	VOLATILE MATTER,WT%	3
ASTM-D4	81	SOLUBILITY IS CS2,WT%	5
ASTM-D3289	1.11	SPECIFIC GRAVITY @25 C	6
ASTM-D3279	79	NORMAL HEPTHAN INSOLUBLES,WT%	7
-------------------	Black	COLOR IS MASS	8
-------------------	Black	COLOR IN STREAK OR POWDER	9
ASTM-D36	210	SOFTENING POINT,C	10
ASTM-D5	0	PENETRATION @25C	11
ELEMENT ANALYSIS
ASTM-D5291	84	CARBON,WT%	1
ASTM-D5291	7.1	HYDROGEN,WT%	2
ASTM-D5291	3.67	NITROGEN,WT%	3
ASTM-D5291	3.1	OXYGEN,WT%	4
LECO(S)ANALYZER	4	SULPHURE,WT%	5