Tag Archives: реагент
The results of physico-chemical studies of reagent K-100 and laboratory analysis of the basic properties of bentonite suspension and natural clay solution taken from a well being drilled in the Noyabrsk oil and gas region of Western Siberia are presented. The reagent K-100 was examined in the concentration range of up to to 3%.
Reagent K-100 is a plugging polymeric additive for liquidation of interformational overflows. The reagent K-100 is manufactured at the Tyumen Plastics Plant “Uralchimplast”. With the industrial application of K-100 reagent in clay solutions, the density of the solution and colloidal content of the clay fraction were observed to be high.
Aqueous solutions with K-100 reagent additives practically do not reduce the surface tension at the kerosene boundary and exhibit low inhibitory properties with respect to the clay slurry of the Noyabrsk oil and gas region of Western Siberia. By the amount of liquid emitted during the swelling of the clay powder, the K-100 reagent is observed to be inferior to other known inhibitors. It is also ineffective for use in qualitative perforation of terrigenous productive horizons; therefore, it is more expedient to be used in composition with other swelling inhibitors, hydrophobic agents, surface active agents and surfactants
The reagent K-100 is observed to form gel-like mixtures with salts of divalent metals. Additions of the reagent in clay solutions actively dilute the solution; the structural and rheological properties become minimal, the pH level increases and flocculation does not occur. Peptization of the clay phase is intensified due to increase in the pH level of the clay solutions
The results of investigations of the two samples of reagents carboxymethyl starch (KMC) and one sample of carboxymethylcellulose sodium technical grade CMC-9/N, the production of LLP “Cellulose Ethers” (Vladimir) for mining and geological, technical and technological conditions of the November oil and gas region of Western Siberia.
The first batch of CMC did not meet the quality performance indicators TU 6-55-221-1396-95, namely the nature of the dissolution. The kinematic viscosity of a 1% aqueous solution of the sample in the CMC received the order before production batch. Consequently KMC also differs from all test samples before KMC to influence the rheological, mechanical and structural properties of drilling fluids, the number of additives in muds. Recommended additives in this mud sample KMC should be increased by 1% or more.
Another sample corresponds to the KVM presented quality indicators for TU 6-55-221-1396-95 and refers to the high viscosity grades. This part can be used as structurant in formulations of drilling mud during drilling for conductor in an amount of 0.2-0.3%.
Experimental test CMC 9 / N corresponds to the data presented by advertising and a brand of low viscosity CMC. This grade CMC 9 / N can be used as a structurant in a composition of bentonite fluids while drilling a conductor in an amount of 0.3% or more, and drilling a main wellbore production tubing in an amount of not less than 0.5%.
Studied the influence of environmentally friendly lubricant additive SRGN (VNIIBT, Moscow) basic and special properties of bentonite suspensions and drilling natural polimergranita drilling fluids oil and gas region of Western Siberia. Given information about physical-chemical properties of the reagent. The results of the test reagent on the solubility in some environments. Presents experiments on the detection of the level of spanelement clay dispersion systems depending on the concentration of the lubricant additive. In these ranges of concentrations of reagents enough studied the stickiness of clay crusts created from artificial and natural solutions.
The above reagent has lubricating properties, however, not in all cases possible to use the reagent without antifoam. The active foaming of the solution occurs only when adding reagent SRGN in an artificially prepared bentonite slurry, adding in the drilling fluid accumulated in the well bore while drilling the well, the foaming does not occur. Technically acceptable concentration of the reagent is in the range of 0.5 to 3.0 % (vol.).
Sample reagent SRGN not adversely affect the basic properties of clay and polymer-clay solution. It is important that the rate of filtration of the solution and the coefficient of stickiness of the filter cake are reduced by a significant amount already, adding a reagent in the amount of more than 0.5%.
Presented the reagent can be applied in the fields of Western Siberia. You should pick up in the composition of the compatible agent and to provide the necessary level of frost resistance of the lubricant additive SRGN, because it’s important in winter to the far North.
For the prevention of complications and emergency situations in the process of drilling wells it is necessary to pay due attention to the processing of drilling fluid lubricant additives. Experience with various domestic and foreign lubricating additives in Western Siberia is described, for example, in scientific papers [1-30]. In recent years, there are constantly new types of reagents and their modifications that need to be adapted to the conditions of drilling wells in specific geological conditions. When selecting reagents, a preference for environmentally friendly lubricant additives.
The results of studies of sodium carboxymethyl cellulose (Na-CMC) produced ZSM “Polymer” (Ekaterinburg), pilot batch production of the “Polymer” (Ekaterinburg) and industrial samples technical CMC brand 83/600 of production of JSC Plant of construction materials “Polymer” (Ekaterinburg).
All presented samples of the CMC refers to a group of high-viscosity reactants, which are actively infilled artificial and natural clay solutions. The first chemicals suitable for clay mortars used in drilling wells in the November oil and gas region under the conductor in the amount of 0.3-0.5%. The second reagent is recommended for drilling fluids used in well drilling under the conductor in an amount of 0.3-0.5%, while drilling under the production casing – 0.5-0.7% 0.05% NTF to reduce the structural and rheological properties. The third reagent is recommended for drilling fluids used in well drilling under the conductor in an amount up to about 0.5-0.6%, and for dissection of productive layers in an amount of 0.5-0.7% from thinning additive of 0.05% of NTF.
In artificial suspensions of bentonite and natural clay solutions with the addition of the reagent CMC temperature control has different influence on the rheological and structural-mechanical properties. Filtration performance and the thickness of the clay cover in the treated natural clay solutions is always lower than in the bentonite suspensions. A significant influence on the manifestation of the properties of the reagent CMC in the washing liquid having the composition and quality of the clay component of the drilling mud.
Results of investigations of physical and chemical properties and the impact on drilling fluid parameters: technical prototype sodium carboxymethylcellulose (Na-CMC) of the brand “Kamtsel-1” manufactured by JSC “Karbokam” in comparison with a reagent Taurus-2; CMC production Novolyalinskogo PPM (Novaya Lyalya Sverdlovsk region); reagent “synthetic adhesive wallpaper” (CSR) household chemical plant “Angarsk petrochemical company” in comparison with a reagent Kem-Pak – karbsimetilirovanny cellulose polymer (manufactured by Kem-Tron, USA) and others.
Kamtsel-1 solution forms amorphous flakes only when mixed with a solution of calcium chloride. Kamtsel reagent-grade 1 corresponds CMC 700, the optimum additive for drilling fluids for drilling a wellbore production tubing up to 0.1% and the solutions used in drilling for conductor – to 0.2-0.25%.
CMC sample is also in line with the brand 600. Optimal additives to drilling fluids for drilling under the production casing comprise 0.05-0.10%, and a jig for drilling – up to 0.2-0.4%. Reagents can be added to drilling fluids in dry form.
CSR solutions are rapidly degraded in the rusty metal container. Additives CSR leads to reduction index filtration of drilling fluids and simultaneously – to improve the structural and rheological properties unlike additives Kem-Pak. Therefore it is necessary to carry out further processing agents, diluents. CSR reagent can be used as a stabilizer in drilling fluids for drilling jig in an amount of 0.5% or more, and when a production tubing drilling – 0.1-0.3%.