Hello all.. Kindly help me.. I want to make Oil Based drilling mud in the lab for experimentation purpose... I am combining petroleum diesel, water, barite, bentonite and lime... I want to know if I prepare 1 litre of mud.. what should be the quantity of all materials I have to add???
Normally OBM is designated 70/30 or 80/20 etc which indicates 70% diesel oil and 30% water + other constituent by volume .
Agree OBM is normally 70/30 (or 80/20 or 85/15) which means 70% of base oil in volume and 30% of brine in volume ( 80% of base oil and 20% of brine etc. Other additives include emulsifier to keep stable the emulsion of brine in the oil base, CaCl2 in the brine, filtrate reducer, barite to adjust mudc weight, wetting agent for solids in mud to be oil wet
http://zdamsam.ru/
Emulsion solutions and solutions on petroleum basis:
Emulsion solutions - chemically treated drilling fluids, in the aqueous dispersion medium of which evenly distributed droplets of oil. The oil content is brought to 10-30%. Owing to the use of emulsion solutions, the penetration and mechanical drilling speed is increased (especially in ductile and viscous rocks), the pumping of the solution is facilitated, the risk of sticking and tightening the tool is significantly reduced.
The main component is pure oil, oil with water (up to 20%), diesel fuel, etc. With the introduction of 5% oil sharply reduces stickiness, at 7-8%, the formation of oil seals stops. The use of emulsion drilling fluids does not prevent the implementation of electrometric studies,
Oil-based solutions are prepared from petroleum products. As a basis, diesel fuel with an aromatic hydrocarbon content of no more than 28% is used.
The solid phase of the solution is oxidized bitumen with a softening point of 160-100 ° C. Oxidized paraffin or oxidized bitumen and caustic soda are used as structure builders.The preparation of the solution reduces to the dissolution of oxidized bitumen and oxidized petroleum products in diesel fuel.
Apply two types of solutions, closed on an oil basis.
1. A solution with diesel distillate or diesel fuel as a dispersion medium, stabilized with sodium soap of oxidized paraffin. Composition: 10-20% bitumen; 1,5-3% of sodium soap of oxidized paraffin; 0,7-1,5% of caustic soda; 1-5% of water; The rest (up to 100%) is the oil mass (diesel distillate or di
green fuel).
2. A solution prepared on the basis of distillate petroleum products (dispersion medium) stabilized with sodium soap of oxidized petrolatum; the remaining components are added in the same amounts as in the first type solution.
Properties of solutions prepared on an oil basis deteriorate when they are significantly watered. The permissible amount of water should not exceed 10%.
Solutions prepared on an oil basis are used for opening: 1) productive layers with high permeability and low reservoir pressure; 2) strongly drained productive layers; 3) productive layers with low permeability, regardless of reservoir pressure, especially if the productive reservoir is represented by sandstone cemented with soaking clays; they are also recommended for direct drilling of wells in complicated geological conditions, where application of conventional drilling mud does not give positive results.
The oil-based solution is prepared as follows:
To prepare the solution, 60% of the concentrate is poured into the clay mixer (27-30% of rubrax, 5-6% of oxidized petrolatum and 64-68% of diesel fuel), and with continuous stirring, 40% caustic soda solution is introduced in an amount of 1.5-2, 5% to the volume of the stirrer. Then, the solution is stirred for 15-20 minutes, so that the alkali reacts with the oxidized petrolatum, add diesel fuel or oil to the total volume of the stirrer and mix for an additional 10-15 minutes.
Parameters of a solution prepared on an oil basis, when drilling a second barrel, if necessary, are adjusted with additives of concentrate, diesel fuel and a weighting agent.
Monitoring the parameters of the washing liquid:
When drilling the second barrel it is necessary to monitor the parameters of the drilling fluid and maintain them, as required by the geological and technical order. For this purpose the drilling kit of the RBB solution is intended, which includes: a hydrometer, a viscometer, a thermometer and a stopwatch.
For complete control of all parameters of the drilling mud, the KLR-1 lab kit is used - a set of tools for the drilling mud information system
- Badges
- Science topic
- Similar topics
- Engineering
- Petroleum Engineering
- Oil