Browsing by Subject "wells"

Now showing 1 - 8 of 8

Access status: Open Access ,
Deep well coring of oil and natural gas wells
(2008) Pinka, Ján; Wittenberger, Gabriel
Coring is a drilling-technical operation which allows integral sampling of the drilled rock - a so-called core. The core is the highest quality part of material documentation of the well. Based on technical equipment used for coring, and based on a chosen coring technology, we can get mechanically undamaged core (or in physically unaffected condition). Individual techniques and technologies allow core-sampling of various types of rocks.
Access status: Open Access ,
Drainage wells as an integral part of a deep dewatering system in Szczerców field in the Bełchatów Lignite Mine
(2017) Gasiński, Jerzy; Macuda, Jan; Szewczyk, Sławomir
The open-pit extraction of lignite in the Bełchatów Lignite Mine can be conducted after prior deep dewatering of the rock mass, realized with large-diameter dewatering wells distributed in the form of outer and inner barriers. This type of dewatering system allows for safe extraction of lignite, owever residual waters in the overburden may locally create hazard. These are rain waters infiltrating into the rock mass, and which, due to the complicated geological structure of the deposit and disturbed system of layers, were not intaken by wells belonging to the primary dewatering system. They are removed through the existing and newly drilled exploration wells, which are converted into drainage wells. Such wells are used for removing waters suspended in permeable overburden and avitationally moved to the lower absorbing layers, from where they are directed to the primary dewatering ystem wells and then to the surface water courses. The applied enhancement of the dewatering system used in the lignite deposit significantly improves the safety of mining works conducted in this place. Technical and technological aspects of drilling dewatering wells in Bełchatów Lignite Mine are discussed in this paper and followed by the evaluation of efficiency of dewatering of the overburden.
Access status: Open Access ,
Improved calculations for bottom hole injection pressure versus depth while gas injection for pressure maintenance of Tengiz field
(2010) Abdrahmanova, Diana; Jiyembayeva, Kalamkas; Žapbasbaev, Uzak K.
Celem projektu jest obliczenie ciśnienia zatłaczania na dnie otworu w funkcji głębokości w trakcie zatłaczania gazu w celu utrzymania ciśnienia w złożu Tengiz oraz określenie zdolności iniekcyjnych poszczególnych warstw złoża (Bash, Serp, Okskey). Podstawowym celem jest określenie korelacji dla siedmiu istniejących otworów iniekcyjnych oraz oszacowanie ciśnienia zatłaczania na dnie otworu na końcu rur (środkowy Bash, środkowy Serp, środkowy Okskey). Dla każdego otworu wylicza się indywidualną korelację na podstawie wartości głębokości, temperatury, ciśnienia i wydatku. W wyniku tego powstają odchylenia przewidywanej wartości ciśnienia w funkcji zmierzonego ciśnienia. W opinii autorów podstawowym powodem tego są różne szacowane prędkości zatłaczania, w zawiązku z czym trudne jest precyzyjne oszacowanie zatłaczanych objętości.
Access status: Open Access ,
Instalacja gazodźwigu nurnikowego oraz żerdziowej pompy wgłębnej w zawadniających się odwiertach gazowych - wyniki prób przeprowadzonych w PGNiG S.A. Oddział w Sanoku
(2010) Dębiński, Maciej; Rachwalski, Grzegorz; Ździebko, Artur
In order to improve the ultimate recovery coefficient of water driven natural gas reservoirs, PGNiG Branch in Sanok for two years has been testing the plunger lift equipment and downhole sucker rod pump installations. This paper presents how these methods have affected the fluid production as well as solutions implemented during tests adapted to the standard gas well completion. Plunger lift method was used in a marginal well, where the foaming agents and normal blow out had no longer ensured the stable production. Pumping was utilized in completely flooded gas well, intended for the abandonment. First gained experiences confirm the effectiveness of both methods of gas well de-watering.
Access status: Open Access ,
Laboratoryjne metody oceny trwałości stwardniałych zaczynów cementowych stosowanych do uszczelniania otworów wiertniczych
(2007) Rzepka, Marcin; Stryczek, Stanisław
The paper deals with laboratory methods of assessing durability of hardened cement slurries used for sealing drilling wells lie in evaluation of, e.g. strength parameters of hardened cement slurry, its porosity and gas permeability as well as the type of the formed microstructure. There are also presented exemplary results of analyses of hardened cement slurries obtained for samples long exposed to the simulated well conditions in highly mineralized waters and temperature 95-120 degrees of Celsius.
Access status: Open Access ,
Production and evaluation study for a natural gas field in the North - Eastern part of the Getic Depression
(2011) Grigoraş, Ioan Dan
The work targets, reference date 01.01.2007, are: - additional data analysis: to the study (1998) and confirmed at 01.01.2000 and to the last study at reference date 01.01.2005, - geological model update according to 3D seismic data interpretation performed at the beginnig of the year 2007, - resources and reserves reevaluation in order to be confirmed, - optimum production scenario set up, - discounted cash flow analysis.
Access status: Open Access ,
Production and evaluation study for an oil with dissolved associated gas field in the Pannonian Depression
(2012) Grigoraş, Ioan Dan
The work targets are: - additional data analysis, - geological model update, - resources and reserves reevaluation in order to be confirmed, - optimum production scenario set up, - discounted cash flow analysis.
Access status: Open Access ,
Study of usage efficiency of multistage filters on mineral leaching process
(2013) Alibaeva, Karlygaš Abylhakovna; Kul'džabekov, Alibek Bahidžanovič; Tungatorova, M. S.; Kaltaev, Ajdarhan
In this work the numerical study of the usage efficiency of the multistage filters setting technology on the process of mineral extraction by the in-situ leaching method is carried out on the basis of mathematical simulation. A comparison of the extraction degree at single and multistage filters is implemented. Obtained decisions for a multistage filters setting qualitatively conform to the experimental findings.