The Synergy Between Borehole Imaging and Geosteering

2021 ◽  
Author(s):  
Chidi Ndokwu Ndokwu ◽  
Kenneth Amadi ◽  
Victor Okowi ◽  
Kingsley O. Okengwu ◽  
Jones E. Acra
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Depositional Environments ◽  
Geological Structures ◽  
Gas Well ◽  
Gas Industry ◽  
Different Types ◽  
Petrophysical Parameter ◽  
Logging While Drilling ◽  
Borehole Imaging

Abstract The quest to gain more knowledge of the subsurface and to reduce uncertainty in the interpretation of subsurface data has been an age-long effort in the oil and gas industry. To achieve this, asset owners use tools with improved resolution, utilize different types of logging tools and integrate the interpretation from these logging tools. This paper will review some projects where data from borehole imaging tools were used to support geosteering decisions and to gain more knowledge of reservoir structure. Borehole images are logs based on the circumferential measurement of a petrophysical parameter along a borehole wall. Logging-while-drilling borehole images can be used for structural, sedimentological and petrophysical analysis. These near-wellbore analyses contribute greatly to the success of most geosteering jobs. Geosteering is a process used in placing high-angled and horizontal wells in subsurface intervals of interest. It involves the use and integration of data from varied sources. This paper will show different scenarios, in different depositional environments, where borehole imaging supported the geosteering process and how geological interpretations from geosteering brought more clarity to borehole imaging analysis. Examples of these will highlight the stratigraphic relationship between geological structures and wellbore trajectory, detection of subsurface structural discontinuities, primary sedimentary structures, and the interpretation of complex geological structures. This paper will broaden our understanding of the applications of borehole imaging and how it integrates with geosteering in achieving oil and gas well objectives.

A New Approach To Evaluate Fault-Sliding Potential With Reservoir Depletion

SPE Journal ◽  
2019 ◽  
Vol 24 (05) ◽  
pp. 2320-2334
Author(s):  
Kai Zhao ◽  
Xiaorong Li ◽  
Chuanliang Yan ◽  
Yongcun Feng ◽  
Liangbin Dou ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Fault Reactivation ◽  
Normal Faults ◽  
Gas Industry ◽  
Fault Stability ◽  
Different Types ◽  
Fault Properties ◽  
Derivatives Of ◽  
Types Of Faults

Summary Fault reactivation caused by reservoir depletion has been an important issue faced by the oil and gas industry. Traditional views suggest that with reservoir depletion, only normal faults can be activated and fault stability either monotonically decreases or increases, which are not consistent with field observations. In this paper, a fault–sliding–potential (FSP) model was developed to analyze fault stability during reservoir depletion for different types of faults. The evolution trend of fault stability with reservoir depletion and the corresponding judging criteria were obtained by calculating the derivatives of FSP. The influences of reservoir depletion on nonsealing and sealing faults were investigated. Case studies were performed to analyze FSP for different types of nonsealing and sealing faults with different fault properties and attitudes. The results show that reverse and strike faults might also be reactivated with reservoir depletion. The fault stability might not monotonically decrease or increase; instead, four evolution patterns of fault stability might occur, with reservoir depletion dependent on the parameters of the faults. Reservoir depletion usually leads to a higher sliding risk for sealing faults than for nonsealing faults. The results also indicate that fault stability is a strong function of fault attitudes, including the dip and strike of the fault.

scholarly journals Review on Applications of Non-ionic and Anionic Surfactants in Water Based Drilling Fluids

2021 ◽  
Vol 9 (VII) ◽  
pp. 2054-2060
Author(s):  
Mritunjoy Dihingia
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Drilling Fluids ◽  
Gas Well ◽  
Environment Friendly ◽  
Gas Industry ◽  
Wellbore Instability ◽  
Filtration Loss ◽  
Water Based ◽  
Hydrocarbon Reserves

In recent times, with the advent of exploSration activities in deeper hydrocarbon reserves, drilling of wells in HPHT conditions is one of the most studied field in the upstream oil and gas industry. Water-based fluids are the most common and frequently used drilling fluids oil and gas well construction. Although, water-based drilling fluids are environment friendly and relatively in-expensive, it is often associated with many problems when used in HPHT conditions. In order to overcome these problems in such viable conditions, modified surfactants are used with the mud to counteract the problems associated with it. This paper discusses the different applications of anionic and non-ionic surfactants in water-based drilling fluids both in laboratory and field scales. The paper also discusses the mechanisms of the surfactants and the effect on various mud properties to overcome hole problems like wellbore instability, rheology and filtration loss, foaming and flocculation of mud.

scholarly journals Financial Feasibility Study of Oil and Gas Well in Indonesia Case Study: New Oil and Gas Well in PT ABC

2021 ◽  
Vol 5 (6) ◽  
Author(s):  
Henni Rahman ◽  
Sylviana Maya Damayanti
Keyword(s):  
Risk Analysis ◽  
Economic Analysis ◽  
Oil And Gas ◽  
Capital Expenditure ◽  
Oil And Gas Industry ◽  
Gas Well ◽  
Gas Industry ◽  
Final Project ◽  
Split Method ◽  
The Government

PT ABC is a subsidiary of PT PXZ (state owned companies under SKK Migas and PT Pertamina supervision) which is engaged un upstream sector in Indonesia. Seeing the continuing decline in oil and gas reserves in Indonesia and increasing demand, the government request all upstream company to find more source. PT ABC is trying to continue to increase production of oil and gas by opening a new potential project. Revenue sharing will use the gross split method. The purpose of writing this final project is to help PT ABC analyze new projects that will be undertaken. The analysis is carried out by looking at the business situation externally and internally and will be followed by economic analysis and risk analysis to identify the factor that has impact of the project. External analysis shows that the oil and gas industry is still an attractive industry for the government to run and support. However, in its implementation the company have to follow the applicable regulations since oil and gas industry are one of the strategic industries. In addition to funding activities, PT PXZ as the holding company is in a healthy financial condition. The results of economic analysis on the PT ABC project show that this project can be implemented and will generate profits for the company. The NPV to be obtained is USD 46.701.182, the IRR obtained is 17.15%, PBP will last for 5.52 years, and the PI has a value of 1,98. From the risk analysis, there are several factors that affect the economic results of the project, namely the price of oil and gas, the percentage of oil and gas sales, capital expenditure, and the percentage of oil and gas split.

Deployment of Digital NDT Solutions in the Oil and Gas Industry

2020 ◽  
Vol 78 (7) ◽  
pp. 861-868
Author(s):  
Casper Wassink ◽  
Marc Grenier ◽  
Oliver Roy ◽  
Neil Pearson
Keyword(s):  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Gas Industry

What Does Rent Give to Federal Budget (on the Russia's Budget Dependence upon "Oil Dollars")

2004 ◽  
pp. 51-69 ◽  
Author(s):  
E. Sharipova ◽  
I. Tcherkashin
Keyword(s):  
Oil And Gas ◽  
Strong Dependence ◽  
Oil Prices ◽  
Federal Budget ◽  
Oil And Gas Industry ◽  
Gas Industry ◽  
Resource Rent ◽  
Tax Legislation ◽  
Russian Economy ◽  
The Government

Federal tax revenues from the main sectors of the Russian economy after the 1998 crisis are examined in the article. Authors present the structure of revenues from these sectors by main taxes for 1999-2003 and prospects for 2004. Emphasis is given to an increasing dependence of budget on revenues from oil and gas industries. The share of proceeds from these sectors has reached 1/3 of total federal revenues. To explain this fact world oil prices dynamics and changes in tax legislation in Russia are considered. Empirical results show strong dependence of budget revenues on oil prices. The analysis of changes in tax legislation in oil and gas industry shows that the government has managed to redistribute resource rent in favor of the state.

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