Saikat Mazumder

Saikat Mazumder
Shell Development Australia · Frontend Development Surat Basin Queensland

PhD Petroleum Engineering

About

49
Publications
5,234
Reads
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1,312
Citations
Additional affiliations
March 2010 - February 2016
Shell Global
Position
  • Development Lead

Publications

Publications (49)
Conference Paper
Solids production in coal seam gas wells have been a large contributor to down-hole completion failure in the Surat Basin, Australia. Since 2016, solids production has become an important focal point for well quality improvement for the Surat Basin operator and has focused its efforts on trying to a) understand the mechanism of pump failure related...
Conference Paper
Development of coal seam gas fields is conceptually simple but complexity arises with: the stochastic nature of coal reservoirscontinually changing work scopethe large number of wells required to meet gas contracts. In the current environment, the cost of developing thousands of wells and hundreds of kilometres of associated gathering is a key driv...
Article
In this work, we discuss the use of a local model developed previously [1] that describes the multiphase flow of gaseous species and liquid water within a single coal seam to investigate the gas production from a spatially heterogeneous production field. The field is located within the Surat Basin in Queensland, and is composed of a total of 80 pro...
Conference Paper
Coalbed methane (CBM) geology dominance in Surat basin is a coal-based fluvial depositional system. For CBM subsurface modelling, it is still primarily driven by simple deterministic static model and building on the understanding of long extends of coal continuity in lateral distribution. In reality, coal seams (or plies) tend to split or merge lat...
Conference Paper
The Walloon Coal Measure (WCM) in the Surat Basin in Australia consists of coal-rich mire and a fine-grained meandering fluvial system. The main gas producing targets of WCM are numerous thin coal plies within six coal members with frequent pinching outs, splitting and merging. The geology is stratigraphically complex making correlations of individ...
Conference Paper
Full-text available
Upscaling of a reservoir model is normally conducted when a high resolution model has been generated and it is practically impossible to run the simulation using a high resolution model. Reservoir model upscaling is done in order to have a reasonably coarse model for reservoir history matching and forecasting purposes without losing some of heterog...
Article
This paper presents the results of a laboratory program of work to measure the coal properties required to apply models for the behaviour of the absolute reservoir permeability during gas production. These measurements were made on core samples from the Bowen Basin of Australia, an important area for coal seam methane production, and involved apply...
Article
In this work we discuss the development of a mathematical model to predict the shift in gas composition observed over time from a producing CSG (coal seam gas) well, and investigate the effect that physical properties of the coal seam have on gas production. A detailed (local) one-dimensional, two-scale mathematical model of a coal seam has been de...
Conference Paper
Full-text available
The inflow performance relationship (IPR) for a coalbed methane (CBM) reservoir is relatively complex as the production behaviour is different from conventional gas wells, as gas in coal is stored by means of adsorption. Most often coal reservoirs are relatively under saturated, meaning the pressure in the reservoir needs to be substantially deplet...
Conference Paper
Coalbed methane (CBM) has been considered a relatively mature unconventional gas resource in North America. In Australia, where the CBM or coal seam gas (CSG) industry is nearly two decades old, there have been successful and unsuccessful pilot projects and resources have been slower to develop after nearly twenty-five years since North American te...
Conference Paper
This paper describes the application of down-hole monitoring technologies to a coal seam gas (CSG) field located in the Bowen Basin in Queensland, Australia. The monitoring technology includes both conventional bottom-hole pressure sensing and the newer, fibre optic-based Distributed Temperature Sensing (DTS). As one of the first applications of DT...
Conference Paper
This paper presents a case study in the application of an advanced production data analysis (PDA) technique for coalbed methane (CBM) through the use of stochastic single-well history matching (SWHM) as a method that enables the exhaustive identification of the range of reservoir parameters underpinning the historical production, with flexibility t...
Article
CSG development often presents significant challenges in reservoir characterisation and prediction. Both gas and water production are driven by systems of interconnected or disjointed cleats; hence, a clear understanding of cleat geometry is required to optimise the prospective production and minimise the cost of drilling. Electrical and ultrasonic...
Article
Full-text available
The advancement in Production Data Analysis (PDA) techniques allows the determination of useful reservoir properties such as permeability, drainage radius and original gas in place (OGIP). Recent publications (Clarkson8 et al 2007; Clarkson9 et al 2008) demonstrate the modification of production type-curves and material balance methods for Coalbed...
Article
A number of coalbed methane (CBM) to liquefied natural gas (LNG) projects are currently advancing in Australia, among which is the Arrow LNG project. To ensure reliable supply to an LNG plant, production availability of the integrated CBM system consisting of a large amount of wells and production facilities needs to be understood, including the be...
Article
Diagnostic fracture injection testing (DFIT) has become an established method of well testing in low permeability unconventional reservoirs - particularly in shales and coal seam gas (CSG). As well as providing in-situ measurements of permeability and reservoir pressure, the test allows estimation of the closure pressure (and fluid loss characteris...
Article
Decline curve analysis (DCA) has been a popular technique to forecast production and estimate reserves using production data for about seven decades. The reliability of forecasts and reserves estimates obtained through DCA ultimately depends on the quality of the data collected and on the experience and judgment of the analyst. It is important to k...
Article
This paper describes application of an established coal seam gas (CSG) testing technology to the reservoir and production conditions prevalent in the Bowen basin, Queensland, Australia. The technology involves using Raman spectroscopy to measure gas partial pressure in single phase fluids produced under pressure from dewatering coal seam gas wells....
Article
The Coal Seam Gas (CSG) industry is currently focused on the large-scale development of a number of Liquefied Natural Gas (LNG) projects in Queensland, Australia. Arrow Energy is one of four proponents undertaking to develop such a project, with a focus on the Surat and Bowen basins. Arrow Energy also supplies gas to power stations, mineral refinin...
Article
Coal reservoirs have a dual porosity, naturally fractured structure. As in other naturally fractured formations coal permeability is sensitive to the effective stress, decreasing exponentially as the effective stress increases. In contrast to other naturally fractured reservoirs, coal shrinks as gas desorbs. This shrinkage plays an important role i...
Conference Paper
Determining the potential range of recoverable volumes for a Coalbed Methane (CBM) prospect is a necessary precursor to a successful development plan. Several key best practices were incorporated into a workflow to consistently assess the CBM potential of numerous prospective areas. For each area 3D static models were built based on available struc...
Article
Matrix shrinkage in coal-seam gas reservoirs as a result of production, and the resultant impact on absolute permeability, is a current area of intense interest. A number of publications have documented the existence of this phenomenon. The exponential growth behaviour of coal seam permeability with reservoir pressure depletion has been observed pr...
Article
The risk profile for an unconventional resource play differs from a conventional opportunity in that the producibility, per well Estimated Ultimate Recovery (EUR) and Unit Technical Cost (UTC) are more important for identifying potential success than proving the presence of in-place volumes. Unconventional plays are often characterised by a large...
Article
This paper gives an analysis of the Thomas and Windle model (Thomas and Windle 1982) to determine its usefulness for describing anomalous diffusion of CO2 in coal and its relation to matrix swelling. In addition, a finite-element description for this model is derived. For reasons of easy reference, a shortened derivation of the Thomas and Windle mo...
Article
The purpose of this paper is to provide a view on the South Sumatra basin CBM development potential. The basin ranks as one of Indonesia's most prospective coalbed methane (CBM) basins, but well testing is still in the earliest stages. In S. Sumatra basin there are three distinct identifiable sub-basin evolution periods. First, a period of horst-gr...
Article
Volumetric shrinkage due to methane desorption from the coal matrix has significant influence on the stress regime and fracture permeability in coal. Permeability changes (due to primamry depletion) up to two orders of magnitude have been reported from the Fairway region in the San Juan Basin. Several analytical models have been developed to predic...
Article
Full-text available
Enhanced coalbed-methane (ECBM) recovery combines recovery of methane (CH4) from coal seams with storage of carbon dioxide (CO2). The efficiency of ECBM recovery depends on the CO2 transfer rate between the macrocleats, via the microcleats to the coal matrix. Diffusive transport of CO2 in the small cleats is enhanced when the coal is CO2-wet. Indee...
Article
Full-text available
A large diameter (∼70mm) dry coal sample was used to study the competitive displacement of CH4 by injection of supercritical CO2, and CO2–CH4 counter-diffusion in coal matrix. During the test, a staged loading procedure, which allows the calibration of the key reservoir modelling parameters in a sequential and progressive manner, was employed. The...
Article
Full-text available
Scaled in situ laboratory core flooding experiments with CO2, N2 and flue gas were carried out on coal in an experimental high P,T device. These experiments will be able to give an insight into the design of the injection system, management, control of the operations and the efficiency of an ECBM project. Although the experience gained by the oil i...
Article
The matrix volume of coal swells when CO2 / CH4 adsorb on the coal structure. In coalbed gas reservoirs, matrix swelling could cause the fracture aperture width to decrease, causing a considerable reduction in permeability. On a unit concentration basis, CO2 causes greater degree of coal matrix swelling compared to CH4. Much of this difference is a...
Article
Laboratory core flooding experiments with CO2, N2 and flue gas were carried out on coal in an experimental high P, T device under in-situ conditions. These experiments will be able to give an insight into the design of the injection system, management, control of the operations and the efficiency of an ECBM project. Although the experience gained b...
Article
This paper gives an analysis of the Thomas and Windle model, which is also proposed to describe anomalous diffusion of CO2 in coal and its relation to matrix swelling. Anomalous (case II, super-) diffusion, which incorporates the swelling of coal matrix by the sorption of CO2, occurs due to coupling of diffusion and relaxation mechanisms. The relax...
Article
The mechanisms, by which the coal seams sorb, retain and store gases needs, to be understood. The results presented in this thesis give an insight into the dynamics of CO2 and other flue gas components in coal that are related to operation feasibility of ECBM projects. The main issues relate to the permeability behavior and the flue gas/ CO2 sorpti...
Article
New techniques to determine distributions of cleat aperture, cleat orientation and cleat spacing from CT scans have been developed. For cleat orientation and spacing distributions, two different coal blocks were scanned. The CT scans have been analyzed for the three orthogonal directions. Histograms of the cleat orientations are bimodal, expressing...
Article
The "swelling" of coal by a penetrant refers to an increase in the volume occupied by the coal as a result of the viscoelastic relaxation of its highly crosslinked macromolecular structure. Projects relating to CO2 sequestration in coal seams suffer a serious setback in terms of injectivity loss resulting from the swelling of coal. Volumetric swell...
Article
Injection of CO2 in coalbed is considered to be an attractive option for storage. Large amounts of carbon dioxide are generated during the burial history of coal. In commercially produced coalbed gas, however, only small amounts of CO2 are found. This has motivated the present investigation of the long-term stability of sequestered CO2 in coal seam...
Article
Presently many research projects focus on the reduction of anthropogenic CO2 emissions. It is intended to apply underground storage techniques such as flue gas injection in unminable coal seams. In this context, an experimental study has been performed on the adsorption of pure CO2 and preferential sorption behavior of flue gas. A coal sample from...
Conference Paper
One option to reduce carbon dioxide emissions in order to control the overall levels of CO2 in the atmosphere is permanent storage in subsurface coal seams, while simultaneously producing methane (ECBM-CO2). This option has gained increasing interest world-wide during the last couple of years, as can be observed by growing interest for ECBM in the...
Article
Enhanced Coal Bed Methane (ECBM) recovery techniques, based on carbon dioxide injection, have been proposed for the recovery of larger fraction of methane in place. Laboratory studies and recent pilot field tests demonstrate that CO2 injection has the potential to enhance coal bed methane recovery through displacement desorption mechanism with an a...
Article
Delft University of Technology - Department of Applied Earth Sciences is focusing on the technical, environmental and economical aspects of the geo-infra structure. Scaled in- situ laboratory experiments on the reservoir properties of coal are carried out in an experimental high P,T device developed for this purpose. In this paper the results of th...
Article
Full-text available
Enhanced Coal Bed Methane (ECBM) combines enhanced recovery of CH 4 from coal seams with simultaneous storage of CO 2 . The efficiency of ECBM depends on the transfer rate between cleats and coal matrix. Diffusive transport of CO 2 in the small cleats is enhanced when the coal is CO 2 -wet. Some coals only become CO 2 -wet at higher pressures. Inde...

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