A novel approach to resource potential estimation and field development of non-structural traps with limited data: a case study of Achimov formation in Western Siberia

Background. The West Siberian basin which is one of the main oil and gas regions of Russia is characterized not only by classical structural traps but also by extremely complex geological objects of Achimov sequence. Thereby, it is quite difficult to evaluate perspectives of license areas within which we can discover those Achimov type of deposits, especially at regional stage exploration in terms of a complete absence of 3D seismic data and uneven coverage of area by 2D seismic surveys. Aim. This article is devoted to the methodology description for probabilistic assessment of the resource base of non-structural traps in the Achimov strata in areas with different 2D-seismic exploration degree. Materials and methods. The methodology based on the “density” method which in relation to the evaluated area uses statistics of estimated parameters and number of bodies in the field analogs. The general line of this paper is how to use this methodology for resource base evaluation in the zones of Achimov deposits intersection as the most promising from the point of further development. Results. As part of the project evaluation according to the proposed approach, the resource base was divided into components — resources of objects in areas of possible intersection and resources of single, non-intersecting objects. Conclusions. It provides an opportunity to spot and conduct a technical and economic assessment of previously uneconomic reservoirs.

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Main directions of searching for hydrocarbons in Nadym-Pursk oil and gas region

Oil and Gas Studies ◽

10.31660/0445-0108-2021-4-23-31 ◽

2021 ◽

pp. 23-31

Author(s):

Y. I. Gladysheva

Keyword(s):

Oil And Gas ◽

Raw Materials ◽

Accumulation Rate ◽

Sedimentary Basins ◽

Seismic Exploration ◽

Research Approach ◽

Field Development ◽

The North ◽

The Sixties ◽

Hydrocarbon Deposits

Nadym-Pursk oil and gas region has been one of the main areas for the production of hydrocarbon raw materials since the sixties of the last century. A significant part of hydrocarbon deposits is at the final stage of field development. An increase in gas and oil production is possible subject to the discovery of new fields. The search for new hydrocarbon deposits must be carried out taking into account an integrated research approach, primarily the interpretation of seismic exploration, the creation of geological models of sedimentary basins, the study of geodynamic processes and thermobaric parameters. Statistical analysis of geological parameters of oil and gas bearing complexes revealed that the most promising direction of search are active zones — blocks with the maximum sedimentary section and accumulation rate. In these zones abnormal reservoir pressures and high reservoir temperatures are recorded. The Cretaceous oil and gas megacomplex is one of the main prospecting targets. New discovery of hydrocarbon deposits are associated with both additional exploration of old fields and the search for new prospects on the shelf of the north. An important area of geological exploration is the productive layer of the Lower-Berezovskaya subformation, in which gas deposits were discovered in unconventional reservoirs.

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Abandonment Best Practices in Unitised Area for Wells and Facilities Straddling Two Countries in Malay Basin: A Case Study

10.2118/208467-ms ◽

2021 ◽

Author(s):

Kumar Nathan ◽

M Arif Iskandar Ghazali ◽

M Zahin Abdul Razak ◽

Ismanto Marsidi ◽

Jamari M Shah

Keyword(s):

Oil And Gas ◽

Late Life ◽

Cost Effective ◽

Successful Outcome ◽

Maintenance Cost ◽

Gas Field ◽

Field Development ◽

Host Government ◽

Cycle Oil

Abstract Abandonment is considered to be the last stage in the oil gas field cycle. Oil and gas industries around the world are bounded by the necessity of creating an abandonment program which is technically sound, complied to the stringent HSE requirement and to be cost-effective. Abandonment strategies were always planned as early as during the field development plan. When there are no remaining opportunities left or no commercially viable hydrocarbon is present, the field need to be abandoned to save operating and maintenance cost. The cost associated on abandonment can often be paid to the host government periodically and can be cost recoverable once the field is ready to be abandoned. In Malaysia, some of the oil producing fields are now in the late life of production thus abandonment strategies are being studied comprehensively. The interest of this paper is to share the case study of one of a field that is in its late life of production and has wells and facilities that planned to be abandon soon. The abandonment in this field is challenging because it involves two countries, as this field is in the hydrocarbon structure that straddling two countries. Series of techno-commercial discussion were held between operators of these two countries to gain an integrated understanding of the opportunity, defining a successful outcome of the opportunity and creating an aligned plan to achieve successful abandonment campaign. Thus, this paper will discuss on technical aspects of creating a caprock model, the execution strategies of abandoning the wells and facilities and economic analysis to study whether a joint campaign between the operators from two countries yields significantly lower costs or otherwise.

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An institutional analysis of technological learning in Iran's oil and gas industry: Case study of south Pars gas field development

Technological Forecasting and Social Change ◽

10.1016/j.techfore.2015.12.004 ◽

2017 ◽

Vol 122 ◽

pp. 262-274 ◽

Cited By ~ 4

Author(s):

Mojdeh Mirimoghadam ◽

Sepehr Ghazinoory

Keyword(s):

Oil And Gas ◽

Institutional Analysis ◽

Oil And Gas Industry ◽

Gas Field ◽

Gas Industry ◽

Field Development ◽

Technological Learning

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Trends in onshore seismic data acquisition: a case study on cable-free nodal systems

The APPEA Journal ◽

10.1071/aj15107 ◽

2016 ◽

Vol 56 (2) ◽

pp. 601

Author(s):

Nabeel Yassi

Keyword(s):

Data Quality ◽

Data Acquisition ◽

Seismic Data ◽

Seismic Exploration ◽

Quality Data ◽

Seismic Surveys ◽

The Past ◽

Seismic Data Acquisition ◽

2D And 3D

The desire to conduct onshore seismic surveys without cables has been an elusive dream since the dawn of seismic exploration. Since the late 1970s, seismic surveys were conducted with cabled multi-channels acquisition systems. As the number of channels steadily grew, a fundamental restriction appeared with hundreds of kilometres of line cables dragged on the ground. Seismic surveys within rugged terrain—across rivers, steep cliffs, urban areas, and culturally and environmentally sensitive zones—were both challenging and expansive exercises. Modern technology has made different cable-free solutions practical. High-resolution analogue to digital converters are now affordable, as are GPS radios for timing and location. Microprocessors and memory are readily available for autonomous recording systems, along with a battery the size and weight of a field nodal now promising to power an acquisition unit for as long as required for normal seismic crew operations. Many successful 2D and 3D seismic data acquisition using cable-free autonomous nodal systems were attempted in the past few years; however, there remain a number of concerns with these systems. The first concern queries whether the units are working according to manufacturer specifications during the data acquisition window. The second is the limited or no real-time data quality control that inspires sceptics to use the term blind acquisition to nodal operations. The third is the traditional question of geophone array versus point receiver acquisition. Although a string of the geophone can be connected to autonomous nodes, the preference is to deploy a single or internal geophone with the nodes to maintain the proposed flexibility of cable-free recording systems. This case study elaborates on the benefits of the cable-free seismic surveys, with specific examples of 2D and 3D exploration programs conducted in Australia in the past few years. Optimisation of field crew size, field crew resources, cost implications, and footprint to the environment, wildlife and domestic livestock will be discussed. In addition, the study focuses on the data quality/data assurance and the processes implanted during data acquisition to maintain equivalent industry standards to cable recording. Emphases will also include data analysis and test results of the geophone array versus the cable-free point receiver recording.

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To the question of the breaking depressional tectonics Azerbaijan's zone according to seismic exploration data

Proceedings of OilGasScientificResearchProjects Institute SOCAR ◽

10.5510/ogp20200300440 ◽

2020 ◽

pp. 14-20

Author(s):

N.P. Yusubov ◽

Keyword(s):

Oil And Gas ◽

Seismic Exploration ◽

Seismic Surveys ◽

The Past ◽

Large Numbers ◽

The Republic

There are very few tectonic maps of oil and gas areas of the Republic and explanatory notes to them. They contain, in large numbers, factual material and important theoretical and applied conclusions. However, the results of seismic surveys carried out over the past 25 years indicate some shortcomings in these maps. The paper provides specific examples that prove the correctness of this conclusion and recommendations for their elimi nation.

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Petrophysics and paradigms of oil and gas geology

Georesursy ◽

10.18599/10.18599/grs.2020.si.10-14 ◽

2020 ◽

pp. 10-14

Author(s):

Aleksey M. Khitrov ◽

Elena M. Danilova ◽

Irina N. Konovalova ◽

Marina N. Popova

Keyword(s):

Oil And Gas ◽

Seismic Exploration ◽

Resource Base ◽

Well Production ◽

Exploration And Production ◽

Light Oil ◽

New Ideas ◽

And Migration ◽

Hydrocarbon Deposits ◽

Current Paradigm

The main provisions of the current paradigm of prospecting, exploration and production of hydrocarbons, which are based on petrophysics and seismic exploration, are considered. It is shown that within its framework it is possible to apply any new ideas about the structure of natural reservoirs, the origin and migration of hydrocarbons. This paradigm will make it possible to move to the preparation of a qualitatively new resource base of the oil and gas complex through the discovery and development of hydrocarbon deposits in the best natural reservoirs with the best petrophysical parameters, high density of light oil and gas reserves, and high well production rates. New highly profitable hydrocarbon deposits will be discovered in areas with developed infrastructure, mainly in well-known oil and gas provinces.

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Development and mastering of technologies of production at PJSC MMK a new generation steel rolled stock for m a in pipelines

Oil and Gas Studies ◽

10.31660/0445-0108-2021-5-188-194 ◽

2021 ◽

pp. 188-194

Author(s):

I. S. Fomenko ◽

T. I. Sadykov ◽

O. A. Yadryshnikova ◽

I. V. Gulevich ◽

M. V. Krivolapova ◽

...

Keyword(s):

Oil And Gas ◽

Rapid Assessment ◽

Economic Assessment ◽

Oil And Gas Industry ◽

Information Resource ◽

Rolled Stock ◽

Russian Government ◽

Resource Base ◽

Scientific Center ◽

Gas Industry

One of the key strategic directions of the long-term program for the development of the oil and gas industry is the development of the resource base, including through the acquisition of new licenses at auctions and tenders held by Russian government agencies. To make a prompt decision to purchase a license area, it is necessary to carry out an objective technical and economic assessment. Official resources contain a minimum of initial data for making a decision, which led to the need to create a unified information system for assessing subsoil plots, accumulating information on new unallocated plots. The article gives valuable information about the main capabilities of the unique information resource, which was developed by specialists of Tyumen Petroleum Scientific Center LLC. This information resource is intended to provide the Company's specialists with a tool for rapid assessment of subsurface areas based on complex parameters of geology, development, infrastructure and economics in order to make a decision on the feasibility of acquiring an asset.

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Multihazard Risk Aggregation Approach for Quantitative Risk Assessment of Upstream Oil and Gas Facilities

10.2118/207276-ms ◽

2021 ◽

Author(s):

Luca Decarli ◽

Anna Crivellari ◽

Laura La Rosa ◽

Enrico Zio ◽

Francesco Di Maio ◽

...

Keyword(s):

Risk Assessment ◽

Oil And Gas ◽

Quantitative Risk Assessment ◽

Individual Risk ◽

Safety Barriers ◽

Novel Approach ◽

Risk Aggregation ◽

Plant Level ◽

Hazard Risk Assessment

Abstract For the design and operation of Oil and Gas (O&G) facilities, a Quantitative Risk Assessment (QRA) should be performed to quantify the risk of major accidents due to multiple hazards and sources at the plant level, thus allowing the effective identification and allocation of safety barriers. In this work, a novel approach for the multi-hazard and multi-source aggregation of risks is proposed, accounting for the uncertainties typically unexpressed in a conventional QRA (both on the frequency and severity of the accidental scenarios). The multi-hazard risk assessment framework proposed is applied to assess the Location-Specific Individual Risk (LSIR) for a representative Upstream O&G plant (case study), using a model based on multistate Bayesian Networks (BNs) for different functional units, each one undergoing an initiating event of Loss Of Primary Containment (LOPC). Estimates of frequency and severity for each possible accident scenario are aggregated to eventually calculate the overall LSIR. Moreover, LSIR's confidence intervals are provided to describe the uncertainty associated to the estimates, and the frequency and severity contributions to risk are derived for targeted prioritization of the safety barriers in view of the risk reduction.

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Novel Approach on Thin Bed Reservoir Case Study from Muda Formation, Natuna Basin

Proc. Indon. Petrol. Assoc., Digital Technical Conference, 2020 ◽

10.29118/ipa20-g-244 ◽

2020 ◽

Author(s):

J. Panjaitan

Keyword(s):

Oil And Gas ◽

Reservoir Characterization ◽

Electrical Anisotropy ◽

High Resistivity ◽

Petrophysical Properties ◽

Field Development ◽

Novel Approach ◽

Resistivity Anisotropy ◽

Lateral Extent ◽

Hydrocarbon Saturation

The presence of shale in thin beds reservoirs affects formation evaluation where the standard conventional log analyses are not designed to properly correct this effect. The conventional logging tools, with low vertical resolution, are not able to characterize these thin beds. This implies that log values do not represent the true bed or layer properties, but rather an average of multiple beds. Muda Formation are characterized by thin bed layers, made up of clastic rock sequences with dominant lithology of sandstone inter-bedded with shale, siltstone, and organic material as confirmed by drilling cuttings, logs response, and also supported by observation from sidewall cores. There are many uncertainties related to the presence of thin beds, primarily sand, silt, shale or their combination in term of their petrophysical properties and lateral extent. Inadequate reservoir characterization can cause significant amounts of oil and gas to remain unidentified. Accurate petrophysical parameters determination play an important role in the development plan of a field. The lateral and vertical variations in the petrophysical properties of the reservoir lead to different scenarios of the field development. The study of Muda Formation in this structure has integrated the sidewall core and log data. The contribution of the thin sand laminae to the average log response resulted in underestimating the porosity (Ф) and hydrocarbon saturation (Sh). The advanced measurement, like the resistivity anisotropy, proved quite useful as the vertical and horizontal resistivity across these beds leading to measurable electrical anisotropy. The resistivity measured perpendicular to the bedding is significantly higher than resistivity measured parallel to the bedding. The situation occurs due to high resistivity sand layers interbedded with low resistivity shale layers. The true sand porosity and hydrocarbon saturation were calculated using the laminated sand shale sequence and calibrated with core data. The study led to the more realistic petrophysical estimation of the sand shale laminae. A combination and integration of high-resolution image log for sand count, nuclear magnetic resonance (NMR) for porosity evaluation and triaxial resistivity for volumetric model through Laminated Sand Analysis approach are found useful to solve thin bed reservoir issue.

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