Tag Archives: бентонитовая суспензия
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 STUDY OF THE PRODUCTION BATCHES OF THE REAGENT TYLOSE WATER CHEMISTRY AND ENVIRONMENTALLY FRIENDLY LUBRICANT ADDITIVES FLOTATION-OXAL FOR DRILLING FLUIDS
The influence of commercial batch samples of reagent water chemistry Tilose made by the company “Hoechst AG” (Germany) for the 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 sodium carboxymethyl cellulose (CMC), a reagent Tylose water chemistry.
Acceptable additive reagent Tilose of water lead to a sufficient reduction of the filtration rate of clay solutions. However, the structural-rheological properties of clay solutions increase less than the reagent Tilose EC-7. Results of the effect of additives reagent Tilose of water in mixed solution (from the waste at the wells, followed by enrichment of bentonite clay solution).
The laboratory findings of the two compared quantities of reagents Tilose of water arrived at different times, comparable in terms of impact on the properties of clay solutions, which indicates compliance with the same synthesis technology and production of the reagent.
Additionally, a study conducted for the joint processing of drilling mud reagent Tylose water chemistry and reagents Nа2CО3, NTF, NGL-11. Natural drilling fluids, selected wells were treated in the polymeric reagent Whom Paz, lubricant additive flotation-oxal, and other Data established solutions were subjected to tempering. In some cases, the solution treated with reagent Tylose water chemistry, reduced structural-mechanical and rheological properties, but the rate of filtration of the solutions after incubation are not increased. In precoat solution treated with reagent NGL-11, increased colloidal clay component of the solution, as it has peptizyme action.
The study is based on the effects of carboxymethyl starch reagent KMK-Bur-N – Carboxymethyl starch reagent KMK-Bur-N is an additive to water-based drilling fluids for regulating filtration, structural, mechanical and rheological parameters in the manifestation of mineralized mineral waters containing Ca ++ and Mg ++ ions. KMK Bur-N reagent is produced according to TU 2262-016-32957739-01 by the company CJSC “Polycell” (Vladimir, Russia). Carboxymethyl starch is a chemical product of the interaction of starch with sodium mono chloroacetate in an aqueous solution of sodium hydroxide. The KMK-Bur-N reagent can also be used as part of process fluids for well completion and workover. Details are given on the physicochemical properties of KMK Bur-N reagent.
The addition of the KMK-Bur-N reagent to the bentonite suspension leads to a decrease in the filtration index, as well as an increase in the conventional viscosity, plastic and effective viscosity, dynamic and static shear stress. In addition, the KMK-Bur-N reagent can also be used for the chemical treatment of water-based natural polymer-clay drilling fluids produced in wells. Acceptable additives of KMK-Bur-N reagent in clay muds are in the range of 0.3-0.5%. Carboxymethyl starches are compatible with carboxymethylcellulose reagents and other reagents that are used to treat water-based drilling fluids in the Noyabrsk region of Western Siberia. Virtually all types of starch reagents, including the chemical product KMK-Bur-N are easily destroyed by acid treatment and subsequently removed from the productive formation in the event of formation damage during drilling or workover of wells.
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.