A Case Study of High-Rate Multistage Hydraulic Fracturing in Petrikov Horizon of the Pripyat Trough

2021 ◽  
Author(s):  
Kirill Victorovich Mironenko ◽  
Oleg Leonidovich Voytekhin ◽  
Vladimir Vladimirovich Marchenko
Keyword(s):  
Hydraulic Fracturing ◽  
Sedimentary Cover ◽  
Effective Porosity ◽  
High Rate ◽  
Low Permeability ◽  
Resource Base ◽  
Oil Companies ◽  
Multistage Hydraulic Fracturing ◽  
Stage Of Development ◽  
The Republic

Abstract Currently, the vast majority of the oil fields of the Republic of Belarus are at the final stage of development. In this connection, in order to expand the resource base, Belarusian oil companies are assigned with the task of searching, exploring and developing hard-to-recover reserves. In recent years, a number of geological works have been carried out to search and study the sedimentary cover rocks of the Belarusian part of the Pripyat Trough, the results of these works were the discovery of promising deposits of the Petrikov Horizon of the Upper Devonian. These deposits are represented by dense fractured carbonate rocks with ultra-low permeability (less than 0.01 mD) and low effective porosity (up to 10%). The most promising technology for the development of such reservoirs is the drilling of horizontal wells and the subsequent implementation of Multistage hydraulic fracturing. This article presents the experience of developing ultra-low-permeability reservoirs in the Republic of Belarus in the period 2014-2021, briefly describes the main technologies used, the evolution of technological solutions for effective involvement in the active development of hard-to-recover reserves.

Experience in Optimizing the Location and Parameters of Multistage Hydraulic Fractures for a Multilateral Well Based on Reservoir Simulation

2021 ◽  
Author(s):  
Vil Syrtlanov ◽  
Yury Golovatskiy ◽  
Konstantin Chistikov ◽  
Dmitriy Bormashov
Keyword(s):  
Hydraulic Fracturing ◽  
Reservoir Simulation ◽  
Optimal Placement ◽  
Hydraulic Fractures ◽  
Low Permeability ◽  
Advantages And Disadvantages ◽  
Modeling Methods ◽  
Multistage Hydraulic Fracturing ◽  
Determination Of Parameters

Abstract This work presents the approaches used for the optimal placement and determination of parameters of hydraulic fractures in horizontal and multilateral wells in a low-permeability reservoir using various methods, including 3D modeling. The results of the production rate of a multilateral dualwellbore well are analyzed after the actual hydraulic fracturing performed on the basis of calculations. The advantages and disadvantages of modeling methods are evaluated, recommendations are given to improve the reliability of calculations for models with hydraulic fracturing (HF)/ multistage hydraulic fracturing (MHF).

scholarly journals The efficiency of gas injection into low-permeability multilayer hydrocarbon reservoirs

2021 ◽  
Vol 3 (10) ◽  
pp. 100-108
Author(s):  
Sudad H AL-Obaidi ◽  
Miel Hofmann ◽  
Falah H. Khalaf ◽  
Hiba H. Alwan
Keyword(s):  
Hydraulic Fracturing ◽  
Oil Recovery ◽  
Gas Injection ◽  
Oil Production ◽  
Recovery Factor ◽  
Low Permeability ◽  
Compositional Model ◽  
Multistage Hydraulic Fracturing ◽  
Low Permeability Reservoirs ◽  
Working Agent

The efficiency of gas injection for developing terrigenous deposits within a multilayer producing object is investigated in this article. According to the results of measurements of the 3D hydrodynamic compositional model, an assessment of the oil recovery factor was made. In the studied conditions, re-injection of the associated gas was found to be the most technologically efficient working agent. The factors contributing to the inefficacy of traditional methods of stimulating oil production such as multistage hydraulic fracturing when used to develop low-permeability reservoirs have been analyzed. The factors contributing to the inefficiency of traditional oil-production stimulation methods, such as multistage hydraulic fracturing, have been analysed when they are applied to low-permeability reservoirs. The use of a gas of various compositions is found to be more effective as a working agent for reservoirs with permeability less than 0.005 µm2. Ultimately, the selection of an agent for injection into the reservoir should be driven by the criteria that allow assessing the applicability of the method under specific geological and physical conditions. In multilayer production objects, gas injection efficiency is influenced by a number of factors, in addition to displacement, including the ratio of gas volumes, the degree to which pressure is maintained in each reservoir, as well as how the well is operated. With the increase in production rate from 60 to 90 m3 / day during the re-injection of produced hydrocarbon gas, this study found that the oil recovery factor increased from 0.190 to 0.229. The further increase in flow rate to 150 m3 / day, however, led to a faster gas breakthrough, a decrease in the amount of oil produced, and a decrease in the oil recovery factor to 0.19 Based on the results of the research, methods for stimulating the formation of low-permeability reservoirs were ranked based on their efficacy.

An Integrated Approach for Planning of Multistage Hydraulic Fracturing in Low-Permeability Gas-Saturated Reservoirs with Natural Fractures

2019 ◽  
Author(s):  
Nikolay Pavlyukov ◽  
Ruslan Melikov ◽  
Valeriy Pavlov ◽  
Aleksandr Ptashniy ◽  
Anatoliy Stepanov ◽  
...  
Keyword(s):  
Hydraulic Fracturing ◽  
Integrated Approach ◽  
Low Permeability ◽  
Natural Fractures ◽  
Multistage Hydraulic Fracturing

scholarly journals An in-depth study of the crystalline basement of sedimentary basins is a dictate of the time

Georesursy ◽  
2019 ◽  
Vol 21 (4) ◽  
pp. 55-62
Author(s):  
Renat Kh. Muslimov
Keyword(s):  
Oil Recovery ◽  
Sedimentary Cover ◽  
Material Balance ◽  
Sedimentary Basins ◽  
Crystalline Basement ◽  
Stage Of Development ◽  
The Earth ◽  
Depth Study ◽  
The Republic ◽  
Deep Source

The history of studying the crystalline basement in the Republic of Tatarstan, the state of implementation of the super-deep drilling program is given. The scientific substantiation of the replenishment of exploited oil and oil-gas fields is provided by feeding them with deep hydrocarbons through oil supply channels connecting the deep source of hydrocarbons with sedimentary cover deposits. The crystalline basement is of interest for the search for hydrocarbon deposits, but its role as a transit for replenishing deposits of hydrocarbon sedimentary cover in the process of constant degassing of the Earth is more attractive and justified. To use these processes, a fundamentally new approach to the construction of geological and hydrodynamic models of oil fields is proposed, taking into account the fundamental principles of geological science on the formation and reformation of oil deposits and the deep processes of Earth degassing. Prospects are substantiated for the development of “old” fields that are in long-term development, for the calculation of oil recovery factor taking into account oil entering the reservoir from the depths of the Earth, the need for adjusting methods for calculating and accounting reserves, changing levels of material balance, and scientific and practical suggestions for accounting when calculating reserves and designing the development of fundamental principles of field geology. Further prospects for the introduction of hydrodynamic development methods and their significant expansion due to the opening of the processes of replenishment of sedimentary basin deposits with deep hydrocarbons and the reformation of deposits at a late stage of development are shown.

Application of Hydraulic Fracturing Candidate Selection Leading to Oil Production Boost from Multi-Layered, Low-Permeability Reservoirs: A Successful Case Study in Thailand

2021 ◽  
Author(s):  
Marut Wantawin ◽  
Thum Sirirattanachatchawan ◽  
Theerapat Suppachokinirun ◽  
Kittithuch Hnuruang ◽  
Sorawee Rongdechprateep ◽  
...  
Keyword(s):  
Hydraulic Fracturing ◽  
Success Rate ◽  
Oil Production ◽  
Candidate Selection ◽  
Production Performance ◽  
High Rate ◽  
Hydraulic Fractures ◽  
Low Permeability ◽  
Selection Methodology ◽  
Low Permeability Reservoirs

Abstract Hydraulic fracturing activities implemented in Sirikit onshore oilfield of Thailand over a decade. Before 2018, the variation in post-fracturing production performance resulted in about 50% stimulation success rate. This outcome posted a big challenge to maintain project momentum. Hence, the candidate selection methodology was developed in-house which recommends "suitable" reservoirs. Using selection criteria, the multi-layered, low permeability reservoirs were selected for the 2018-19 Hydraulic Fracturing Campaign. Production analysis was conducted using the information gathered from past hydraulic fracturing campaigns. Reservoir Index (RI) was invented to distinguish the subsurface quality by formation permeability, thickness, pressure, and fluid properties. Together with the Fold of Increase (FOI) owing to hydraulic fracturing, a performance-based relationship was created which can categorize suitable reservoirs based on their RI ranges. This method has been applied to newly drilled wells during 2018. In the end, there were 13 wells selected to perform 28 hydraulic fracturing stages. The 2018-2019 Hydraulic Fracturing Campaign at Sirikit Oilfield was planned and executed. Post-fracturing production tests showing significant improvement. Some wells resulted in excellent oil production rate naturally, while some maintained high rate by artificial lift. According to post-campaign analysis, hydraulic fractures were proved to connect multiple layers of satisfactory flow capacity. In addition, well angle and stress direction accommodated the placement and orientation of multiple hydraulic fractures. As a result, the number of hydraulic fracturing stages that achieved economic production tests improved to 75% success rate. Hydraulic fracturing results from the past were fully utilized in order to achieve sustainable production improvement, thus driving continuous stimulation activities in the future. The candidate selection methodology has shaped up a candidate selection workflow that pointed out success criteria and avoided those that may lead to failure, which proved to be successful in one of the most complex fields in Thailand.

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