scholarly journals TECHNOLOGY FOR PREVENTION AND REMOVAL OF ORGANIC SALTS FROM THE MESOZOIC WELLS OF THE CHECHEN REPUBLIC

2020 ◽  
pp. 25-32
Author(s):  
М.Р. Масаров ◽  
З.Х. Газабиева ◽  
М.А. Эдильгериев ◽  
А.Х. Меджидов ◽  
Р.Х. Моллаев
Keyword(s):  
Alkali Metal Hydroxide ◽  
Oil Field ◽  
Molecular Structures ◽  
Organic Salts ◽  
Stage Of Development ◽  
Bottom Hole ◽  
Deep Wells ◽  
Shallow Wells ◽  
Underground Equipment ◽  
Technical And Economic Indicators

Основными проблемами, осложняющими эксплуатацию глубоких скважин (на определенной стадии разработки), являются низкие коллекторские свойства пластов и отложения в призабойной зоне пласта (ПЗП) и подземном оборудовании органических солей, то есть высокоплавких асфальтено-смолистых веществ (АСВ). Это приводит к существенному уменьшению добычи нефти, вплоть до полного прекращения притока из пласта, затрудняет, а в ряде случаев и полностью исключает, возможность проведения глубинных термогидродинамических исследований скважин и мероприятий по воздействию на призабойную зону пласта, вызывает необходимость в дополнительных затратах, связанных со сбором, транспортировкой и подготовкой нефти, что ухудшает технико-экономические показатели разработки нефтяных залежей. Для борьбы с указанными осложнениями разработаны и используются в нефтепромысловой практике большое количество технологических методов и реагентов на базе растворителей фирмы «РИНГО», ингибиторов и растворителей института «Союзнефтепромхим» (СНПХ-7909, СНПХ- 7941, СНПХ-7920М) и другие. Однако указанные реагенты и технологические схемы предназначены для обработок неглубоких скважин, где основную массу отложений составляют соединения парафинового ряда. В условиях отложения высокомолекулярных АСВ они малоэффективны или неприемлемы. В этой связи для условий глубоких высокотемпературных асфальтено-смолообразующих скважин разработаны специальные технологии обработок ПЗП и НКТ. Технология предусматривает использование для удаления и ингибирования отложений АСВ составов, включающих ароматические и предельные углеводороды, поверхностно-активные вещества (ПАВ), а также водные растворы гидратов окиси или силикатов щелочных металлов. Применение смеси растворителей с различной молекулярной структурой основано на различном характере растворимости асфальтено-смолистых и парафиновых веществ. Разработанная технология внедрена на мезозойских скважинах ОАО «Грознефтегаз», что позволило обеспечить безаварийный спуск глубинных приборов для проведения термогидродинамических исследований и значительно увеличить производительность скважин и дополнительно добыть десятки тысяч тонн нефти. The main problems that complicate the operation of deep wells (at a certain stage of development) are low collector properties of formations and deposits in the bottom-hole zone of the formation (PCP) and underground equipment of organic salts, i.e. high-melting asphalteno-resinous substances (ASV). This leads to a significant reduction in oil production, up to the complete termination of the inflow from the formation, makes it difficult, and in some cases completely impossible, to carry out deep thermohydrodynamic studies of wells and measures for impact on the bottom-hole zone of the formation, causes the need for additional costs related to the collection, transportation and preparation of oil, which impairs the technical and economic indicators of development of oil deposits. In order to combat these complications, a large number of technological methods and reagents based on RINGO solvents, inhibitors and solvents of Soyuzneftepromchim Institute (СНПХ-7909, СНПХ-7941, СНПХ-7920М) and others have been developed and used in oil field practice. However, these reagents and process diagrams are designed to treat shallow wells where the bulk of the deposits are paraffin series compounds. Under conditions of deposition of high-malecular ACB, they are ineffective or unacceptable. In this regard, for conditions of deep high-temperature asphalt-resin- forming wells special technologies of treatment of PIP and tubing have been developed. The technology involves the use of compositions comprising aromatic and marginal hydrocarbons, surfactants and aqueous solutions of alkali metal hydroxide or silicate to remove and inhibit ACB deposits. The use of a mixture of solvents with different molecular structures is based on the different solubility of asphalteno- resinous and paraffinic substances. The developed technology was introduced at the Mesozoic wells of OAO Grozneftegas, which allowed to ensure the accident-free descent of deep instruments for thermohydrodynamic research and significantly increase the productivity of wells and additionally produce tens of thousands of tons of oil.

scholarly journals PHYSICAL AND CHEMICAL BASIS OF APPLICATION AND ANALYSIS OF METHODS OF INTENSIFICATION OF OIL INFLOWS FROM WELLS OF KHANKAL DEPOSIT

2020 ◽  
pp. 19-24
Author(s):  
С. Л. Ахмадов ◽  
А. Х. Меджидов ◽  
З. Х. Газабиева ◽  
М. А. Костоев ◽  
Р. Х. Моллаев
Keyword(s):  
High Temperature ◽  
Economic Indicators ◽  
Reservoir Properties ◽  
Well Productivity ◽  
Chemical Basis ◽  
Bottom Hole ◽  
Shallow Wells ◽  
Technical And Economic Indicators ◽  
Physical And Chemical ◽  
Technical Measures

Эксплуатация глубоких высокотемпературных скважин осложняется отложения миасфальтено-смоло-парафиновых веществ (АСПО) в призабойной зоне пласта и в насосно-компрессорных трубах (НКТ), низкой продуктивностью отдельных скважин и их обводнением. Отложения АСПО приводят к снижению продуктивности вплоть до прекращения фонтанирования, а низкие коллекторские свойства пластов вызывают необходимость в работах по восстановлению и увеличению их проницаемости и интенсификации притоков нефти из скважин. По мере обводнения залежи, а также прорывов вод в скважины по отдельным высокопроницаемым зонам, становится актуальной проблема изоляции водопритоков и коррозионного разрушения оборудования. Известные способы борьбы с указанными осложнениями эффективны в основном в условиях неглубоких скважин с низкими пластовыми температурами и давлениями и малоэффективны или неприемлемы в условиях глубоких высокотемпературных скважин. В этой связи в работе даны физико-химические основы применения различных реагентов для повышения продуктивности скважин; предложены оптимальные составы для интенсификации притока нефти из глубоких высокотемпературных скважин Ханкальского месторождения. Указанные геолого-технические мероприятия позволяют повысить эффективность эксплуатации скважин и технико-экономические показатели разработки месторождений. Operation of deep high-temperature wells is complicated by deposits of asphalt-resin-paraffin substances (ASPO) in the bottom-hole zone of the formation and in tubing, low productivity of individual wells and their watering. ASPO deposits lead to a decrease in productivity up to the end of the fountain, and the low reservoir properties of the formations require recovery and increased permeability and intensification of oil inflows from the wells. As the deposit is watered down, as well as water breakouts into wells along separate highly permeable zones, the problem of isolation of water inflows and corrosion destruction of equipment becomes urgent. Known methods of controlling these complications are effective mainly in shallow wells with low formation temperatures and pressures and are ineffective or unacceptable in deep high temperature wells. In this regard, the work provides physical and chemical bases for the use of various reagents to increase well productivity; Optimal compositions are proposed for intensification of oil inflow from deep high- temperature wells of Khankalskoye deposit. These geological and technical measures make it possible to increase efficiency of wells operation and technical and economic indicators of fields development.

ADDITIONAL EVIDENCE ON THE RELATION OF TEMPERATURE TO STRUCTURE IN THE SALT CREEK OIL FIELD, NATRONA COUNTY, WYOMING

Geophysics ◽  
1940 ◽  
Vol 5 (1) ◽  
pp. 47-54
Author(s):  
C. E. Van Orstrand
Keyword(s):  
Oil And Gas ◽  
Oil Field ◽  
The Past ◽  
Considerable Portion ◽  
Bottom Hole ◽  
Deep Wells ◽  
Natrona County ◽  
Salt Creek ◽  
Remarkable Manner

Observations of bottom hole temperatures in approximately 100 deep wells in the Salt Creek field have been made during the past few years by the Stanolind Oil and Gas Company. These recent observations confirm and extend in a remarkable manner the results obtained in the summers of 1922 and 1923 when it was found from temperature surveys in 21 wells that the temperatures over a considerable portion of the field were definitely related to the structure.

scholarly journals Hydrochemistry and environmental isotopes (18O, 2H, 3H, 3He/4He) of groundwater and floodwater in the great area of Hurghada, Eastern Desert of Egypt

2021 ◽  
Vol 80 (11) ◽  
Author(s):  
M. Wannous ◽  
C. Jahnke ◽  
U. Troeger ◽  
M. Falk ◽  
F. Bauer
Keyword(s):  
Environmental Isotopes ◽  
Eastern Desert ◽  
Hydrochemical Parameters ◽  
Deep Wells ◽  
Fractured Aquifers ◽  
He Isotopes ◽  
Shallow Wells ◽  
The Common ◽  
Faulted Zone

AbstractPorous and fractured aquifers exist in the area of Hurghada, Eastern Desert of Egypt, whose recharge processes through the common flash floods are not identified. Hydrochemical parameters, stable isotopes 18O, 2H and tritium in floodwater and groundwater were applied in the area subject to study. Additionally, He isotopes were investigated in the deep wells in the faulted zone at the Abu Shaar Plateau. 3H activity in all sampled points lies below the detection limit excluding a recent recharge component in groundwater. However, the hydrochemical ratios and the stable isotope signature confirm that the shallow wells and springs (Red Sea Hills group) are being recharged from modern precipitation. The hydrochemical parameters of the deep wells at the Abu Shaar Plateau (coastal plain group) confirm another origin for the ions rather than the modern precipitation. Together with the 18O and 2H values, the Br/Cl ratio of this group confirms the absence of seawater intrusion component and the role of the fault as a hydraulic barrier. These 18O and 2H values deviate from the GMWL confirming an evaporation effect and colder infiltration conditions and reveal strongly a possible mixing with the Nubian Sandstone in the region. The 3He/4He ratio confirms a mantle contribution of 2% from the total He components.

scholarly journals EXPLOITATION OF GAS WELLS IN LATE STAGE OF DEVELOPMENT OF GAS FIELDS

2017 ◽  
pp. 85-89 ◽  
Author(s):  
V. V. Panikarovskii ◽  
E. V. Panikarovskii
Keyword(s):  
Production Rate ◽  
Late Stage ◽  
Gas Condensate ◽  
Gas Wells ◽  
Stage Of Development ◽  
Bottom Hole ◽  
Basic Technology ◽  
Water Cut ◽  
Foam Forming ◽  
Gas Fields

At late stage of development of gas fields they need to solve the specific issues of increasing the production rate of wells and decreasing water cut. The available experience of development of gas and gas condensate fields proves, that the most effective method of removing of water, accumulating in wells, is an injection into the bottom hole zone of foam-forming compositions, based on surfactants. The most technological in the application was the use of solid and liquid surfactants. Installation in wells of lift columns of smaller diameter ensured the removal of liquid from the bottom hole of wells, but after few month of exploitation the conditions of removal of liquid from the bottom hole of wells deteriorate. The technologies of concentric lift systems and plunger-lift systems are used in small number of wells. The basic technology for removal of liquid from bottom hole of gas wells at present time is the technology of treatment of bottom hole of wells with solid surfactants.

scholarly journals METHODS FOR INCREASING EFFICIENCY OF HYDRAULIC RIGGING IN THE OIL PRODUCTION PROCESSES

2020 ◽  
pp. 32-38
Author(s):  
М. А. Куразов ◽  
З. Х. Газабиева ◽  
Р. Х. Моллаев ◽  
А. Ш. Халадов
Keyword(s):  
High Efficiency ◽  
Essential Elements ◽  
Oil Field ◽  
Hydraulic Pressure ◽  
Field Equipment ◽  
Field Development ◽  
Bottom Hole ◽  
Oil Flow ◽  
Complex Technology ◽  
Pumping Equipment

Гидравлический разрыв пласта (ГРП) представляет собой комплексную технологию обработок скважин. При этом его следует рассматривать не только как средство воздействия на призабойную зону пласта (ПЗП), но и как один из существенных элементов системы разработки месторождения в целом. Технологические схемы ГРП, в том числе с последующим химическим воздействием, различаются в зависимости от коллекторских свойств обрабатываемых объектов. Их эффективность определяется условиями, связанными с фильтрационными характеристиками пластов, то есть коэффициентами проницаемости близлежащих и удаленных зон объекта. При этом подход к проектированию обработок ГРП будет различным в низко- и высокопроницаемых пластах, и в этой связи грамотный выбор скважин имеет существенное значение. Для исключения смыкания трещин после ГРП и снятия давления в призабойной зоне пласта (ПЗП) в скважины закачиваются различные расклинивающие агенты. Расклинивающие агенты (проппанты) должны противостоять напряжениям горной породы, удерживая трещину раскрытой после снятия гидравлического давления жидкости разрыва и обеспечивая, таким образом, высокую фильтрационную способность призабойной зоны пласта и дебиты нефти скважин. Обработки скважин проводятся с использованием стандартного нефтепромыслового оборудования и насосной техники. Промысловый опыт ГРП в условиях Верхне-Салымского месторождения (Западная Сибирь) показал его достаточно высокую эффективность. Hydraulic fracturing is a complex technology of well treatment. At the same time it should be considered not only as a means of impact on the bottom-hole zone of the formation, but also as one of the essential elements of the field development system as a whole. Technological schemes of MPG, including with subsequent chemical impact, differ depending on collector properties of processed objects. Their effectiveness is determined by conditions related to filtration characteristics of formations, i. e. permeability coefficients of nearby and remote zones of the object. At the same time, the approach to the design of GRP treatments will be different in low and highly permeable formations and in this regard, competent selection of wells is essential. Various proppantsare pumped into wells to prevent closing of cracks after MPG and to relieve pressure in bottom-hole zone of formation. Proppants (proppants) must withstand rock stresses by holding the fracture open after the hydraulic pressure of the fracturing fluid has been removed, and thus ensuring high filtration capacity of the bottom-hole formation zone and well oil flow rate. Well treatments are carried out using standard oil field equipment and pumping equipment. The field experience of GRP in the conditions of Verkhne-Salymsky field (Western Siberia) showed its rather high efficiency.

Inversion of bottom‐hole temperature data: The Pineview field, Utah‐Wyoming thrust belt

Geophysics ◽  
1988 ◽  
Vol 53 (5) ◽  
pp. 707-720 ◽  
Author(s):  
Dave Deming ◽  
David S. Chapman
Keyword(s):  
Thermal Conductivity ◽  
Temperature Field ◽  
Heat Flow ◽  
Random Noise ◽  
Synthetic Data ◽  
Element Model ◽  
Geothermal Gradient ◽  
Oil Field ◽  
Conductive Heat ◽  
Bottom Hole

The present day temperature field in a sedimentary basin is a constraint on the maturation of hydro‐carbons; this temperature field may be estimated by inverting corrected bottom‐hole temperature (BHT) data. Thirty‐two BHTs from the Pineview oil field are corrected for drilling disturbances by a Horner plot and inverted for the geothermal gradient in nine formations. Both least‐squares [Formula: see text] norm and uniform [Formula: see text] norm inversions are used; the [Formula: see text] norm is found to be more robust for the Pineview data. The inversion removes random error from the corrected BHT data by partitioning scatter between noise associated with the BHT measurement and correction processes and local variations in the geothermal gradient. Three‐hundred thermal‐conductivity and density measurements on drill cuttings are used, together with formation density logs, to estimate the in situ thermal conductivity of six of the nine formations. The thermal‐conductivity estimates are used in a finite‐element model to evaluate 2-D conductive heat refraction and, for a series of inversions of synthetic data, to assess the influence of systematic and random noise on the inversion results. A temperature‐anomaly map illustrates that a temperature field calculated by a forward application of the inversion results has less error than any single corrected BHT. Mean background heat flow at Pineview is found to be [Formula: see text] (±13 percent), but is locally higher [Formula: see text] due to heat refraction. The BHT inversion (1) is limited by systematic noise or model error, (2) achieves excellent resolution of a temperature field although resolution of individual formation gradients may be poor, and (3) generally cannot detect lateral variations in heat flow unless thermal‐conductivity structure is constrained.

Research and Application of Ultra-High Cementing Slurry

2016 ◽  
Vol 847 ◽  
pp. 485-489
Author(s):  
Xing Cai Zhang ◽  
Xiao Wei Cheng ◽  
Xiao Yang Guo
Keyword(s):  
High Temperature ◽  
Oil And Gas ◽  
Good Effect ◽  
Fluid Loss ◽  
Cement Slurry ◽  
Sedimentation Stability ◽  
Temperature Resistance ◽  
Deep Wells ◽  
High Temperature Resistance ◽  
Shallow Wells

With the exploration of oil and gas in depth, shallow wells already can’t satisfy the requirement, therefore to explore and develop deep reservoirs is necessary. In the case of deep wells the loop temperature of bottom can reach to 150°C-200°C, which put forward a higher requirement for the high temperature resistance property of cement slurry. At present, many problems existed in the most of high temperature cement slurry. For example, high temperature resistance is not well, cement thickening time can’t adjust easily, mega-thermal sedimentation stability is unsatisfactory, and ultra-retarding phenomenon appeared for the top prone. After research indoors, we developed the ultra-high temperature slurry system by means of the investigation on cementing additives and select proper materials from high temperature resistant fluid loss additives, retarders, flowable agent at the same time. This system needs a lots of properties, such as, adjustable slurry thickening time below 200°C, great slurry sedimentation stability, API loss can be controlled at the range of 0-50ml, insensitive to temperature and density, could be used in low-density and conventional density cement etc. This system be used successfully in the well that loop temperature of bottom reaches to 185°C and get a good effect finally.

Crystal and Molecular Structures of Five 3D Organic Salts from 2,6-Dimethylaniline and Organic Acids

2019 ◽  
Vol 49 (4) ◽  
pp. 245-259
Author(s):  
Zuoran Xie ◽  
Yuan Lu ◽  
Shouwen Jin ◽  
Haomiao Ye ◽  
Zhong Wang ◽  
...  
Keyword(s):  
Organic Acids ◽  
Molecular Structures ◽  
Organic Salts ◽  
Crystal And Molecular Structures

THE DISCOVERY HISTORY OF THE UNIVERSITY OIL FIELD, EAST BATON ROUGE PARISH, LOUISIANA

Geophysics ◽  
1948 ◽  
Vol 13 (3) ◽  
pp. 371-386
Author(s):  
Gordon Atwater
Keyword(s):  
Oil And Gas ◽  
Salt Water ◽  
Oil Field ◽  
State University ◽  
East Baton Rouge Parish ◽  
Louisiana State University ◽  
Shallow Wells ◽  
History Of ◽  
History Of The University ◽  
The University

The localized occurrence of salt water in shallow wells on and near the Louisiana State University campus, in addition to shells collected during the drilling of these wells, attracted the attention of geologists to this area prior to 1926. A torsion balance survey in 1931 was followed by a dry hole drilled in 1933 southeast of the present field. Three separate reflection seismograph surveys during the period of 1934 to 1937, on each one of which a well was drilled without establishing production, were made on the University structure prior to discovery in 1938. The location based on the first reflection seismograph survey should have resulted in the discovery of both the shallow and deep production, and the discovery location was finally made because of the oil and gas shows encountered in this abandoned test. After discovery, an additional reflection survey was made to detail the structure as an aid in development.

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