Browsing by Subject "proppant"

Now showing 1 - 7 of 7

Access status: Open Access ,
Computer simulation of the influence of proppant high diameter grains damage on hydraulic fracturing efficiency
(2017) Knez, Dariusz; Ziaja, Jan; Piwońska, Monika
Throughout the past two decades, there has been a great intensification of research on processes related to hydraulic fracturing. One of the most significant issues is the behavior of proppants under reservoir conditions. It clearly influences the oil production from the stimulated borehole. Quick loss of a fracture conductivity after hydraulic fracturing may be caused by migration of particles into the porous area of the fracture. Another effect is creation of small solid particles as a result of proppant crushing. Mineral sedimentation may occur on grains propping the fracture because of chemical reactions at the area of contact between the proppant and the mixture of reservoir water and the fracturing fluid. The effect of these reactions is changes in the porosity of the proppant package and conductivity of the fracture. The article presents results of a computer simulation of parameter changes of the proppant in reservoir conditions and their influence on oil production. One of paramount factors is proppant grains damage. As a result of a computer simulation, using Fracpro software, the level of decreased conductivity of the fracture was determined. It was also defined that the influence of this phenomenon on lower production in comparison to the situation where proppant damage is not accounted for.
Access status: Open Access ,
Frac-Pack well stimulation
(2010) Moslavac, Bojan; Pašić, Borivoje; Malnar, Matija
During the hydrocarbon production, the formation sand movement has a frequent negative influx to the process because of its hazardous nature. Gravel pack placement is a common well treatment procedure for prevention of formation sand flow to the wellbore. This method is used in petroleum engineering industrial practice since 1950s. Based on it as a conventional technique Frac-Pack method came up as a new modern technology of sand control containing gravel pack placement and hydraulic fracturing all-in-one procedure. In Frac-Pack application, the appropriate viscosified fluid and proppant selection has a key role for achievement of desired fracture height, length and width. Fracture dimensions are controlled by TSO (Tip-Screenout) fracturing procedure. In this paper basic types of proppant are presented as well as resin coated sand, which improves packing of fracture with proppant. Numerous and various Frac-Pack fluids able to resist the high temperature and pressure are described. Downhole Frac-Pack equipment is also presented. Paper also contains a field example of Frac-Pack application performed on one of the Adriatic offshore gas fields, Republic of Croatia.
Access status: Open Access ,
Influence of proppant concentration on rheological parameters of slick water
(2012) Gadji, Soumaila Oumar; Knez, Dariusz
Proppant concentration is one of the main parameters used to design, characterize and describe hydraulic fracturing process, as well as properties of proppant transport and fracturing fluid such as viscosity and viscoelasticity. Low viscosity fracturing fluids decrease proppant transport capability while high viscosity fracturing fluids increase pumping time, proppant transport properties and also the fracture width. A larger proppant size leads to a high permeability of the reservoirs while applying a low stress closure but it requires enough large fracture width to be transported during the process. So combining those parameters in a right way will lead to the achievement of a high performance hydraulic fracturing process. The goal of this paper is to analyze the influence of proppant concentration addition on rheological properties of hydraulic fracturing fluid, using slick water and sand proppant; rheological models are reviewed, and based on the experimental values of different proppant concentrations, the best rheological model describing this process has been chosen based on the best fit curve. A new approach based model is developed in the way of well describing the hydraulic fracturing process. Details are given of the important properties related to hydraulic fracturing fluid. Lab testing results are presented as support to observations made.
Access status: Open Access ,
Overview of issues related to mixing CO₂ and proppant in the method of gas extraction from shale rocks
(2016) Niezgoda, Tadeusz; Miedzińska, Danuta; Stanisławek, Sebastian; Kwietniewski, Michał
To increase the efficiency of fracturing process, proppant materials are added to fracking fluid. This admixture allows to keep developed fracks, that tend to lock, opened. The aim of this overview is to present methods of carbon dioxide and proppant mixing. The most often applied methods are as follows: special medium admixing, direct proppant with $CO_{2}$ mixing. Liquid $CO_{2}$ and proppant blenders are currently commercially used, but are not very popular.
Access status: Restricted ,
Ruch podsadzki płynnej w rurociągach zamulaniowych
(Biblioteka Główna Akademii Górniczej, 1929) Budryk, Witold; Akademia Górnicza. Biblioteka Główna
Access status: Restricted ,
Technologie szczelinowań pokładów węglowych otworami poziomymi wierconymi z powierzchni
(Data obrony: 2016-10-05) Cieślak, Katarzyna
Wydział Wiertnictwa, Nafty i Gazu
Access status: Open Access ,
Zastosowanie biopreparatów do zwiększania efektywności hydraulicznego szczelinowania skał
(2005) Kasza, Piotr
Bioproducts are widely use in oil and gas industry. Some of them can be used for removing welbore zone damage caused by polimer residue after drilling or stimulation treatments. There are commercial available bioproducts for removing polimer residue from proppants and fracture face after hydraulic fracturing treatment. Laboratory study results of proppant damage removing by using bioproducts are described in this paper. Tests were done using BM sand as a proppant and HPG croslinked gel as frac fluid. Commercial available bioproduct Bio 2 was used for proppant bed cleaning. Positive results was reported after the tests, especially in low reservoir temperature.