Feasibility Study of Improved Gas Recovery by Water Influx Control in Water Drive Gas Reservoirs

2014 ◽  
Author(s):  
N.A. Ogolo ◽  
J.O. Isebor ◽  
M.O. Onyekonwu
Keyword(s):  
Feasibility Study ◽  
Gas Reservoirs ◽  
Gas Recovery ◽  
Water Influx ◽  
Influx Control

Method for Calculating Dynamic Reserves of Water Drive Gas Reservoir with Considering of Water-Sealing Gas

2014 ◽  
Vol 522-524 ◽  
pp. 1542-1546
Author(s):  
Xu Zhang ◽  
Wei Hua Liu
Keyword(s):  
Material Balance ◽  
Least Square Method ◽  
Gas Production ◽  
Least Square ◽  
Gas Reservoirs ◽  
Gas Reservoir ◽  
Gas Recovery ◽  
Water Influx ◽  
Calculation Results ◽  
Large Water

When research the behavior of water drive gas reservoirs, especially with large water influx, the first concerned is, how many gas is sealed, how many water seals the gas? Therefore, it is very important to study the amount of water-sealing gas, unsealed gas, and water influx. The amount of unsealed gas influences the Recovery Efficiency, and the water influx influences the drainage intensity, when we take the measures of Strong Drainage Gas Recovery, in the future. In this paper, we analysis Material Balance Equation; establish objective functions with Formation Pressure and gas production data; auto-match by Least-square Method; directly calculate the dynamic reserves of water drive gas reservoir, and the amount of water-sealing gas and water influx. The example calculation of well HB1, proved that the calculation results of this method is more accurate and reliable than in the past, and it is simple and practical as well.

The Vale of Pickering gas fields: Kirby Misperton, Malton, Marishes and Pickering, North Yorkshire, UK Onshore

2020 ◽  
Vol 52 (1) ◽  
pp. 82-93 ◽  
Author(s):  
D. Harrison ◽  
M. Haarhoff ◽  
M. Heath-Clarke ◽  
W. Hodgson ◽  
F. Hughes ◽  
...  
Keyword(s):  
Seismic Data ◽  
Gas Flow ◽  
Lower Carboniferous ◽  
Gas Recovery ◽  
Water Influx ◽  
Water Breakthrough ◽  
Artificial Lift ◽  
Cumulative Production ◽  
Gas Fields ◽  
3D Seismic Data

AbstractThe Vale of Pickering gas fields were discovered over a 20-year period. The development scheme was aimed to deliver 9.3 MMscfd gas to the Knapton Power Station nearby. Cumulative production is 30.3 bcf from an estimated 172 bcf gas initially in place. The gas fields comprise a series of low relief structures at depths around 5000 ft true depth subsea. The primary reservoir is Zechstein Group dolomitized and fractured carbonates of the Permian Kirkham Abbey Formation with average reservoir quality ranges of 12–13% porosity and 0.5–1.5 mD permeability. Secondary reservoirs exist in Carboniferous sandstones directly below the Base Permian Unconformity. The gas is sourced from Lower Carboniferous shales. The fields were discovered using 2D seismic data and subsequent 3D seismic data have been merged to form a 260 km2 dataset. Zechstein production has been limited by early water breakthrough. Artificial lift is planned to enhance the gas flow rate on the Pickering Field and anticipated water influx will be re-injected. If this enhanced gas recovery scheme is successful it can be applied to the other fields. Plans to hydraulically fracture a number of zones in the Carboniferous Lower Bowland Section are in progress.

The Dual-Reciprocity Boundary Element Method Solution for Gas Recovery from Unconventional Reservoirs with Discrete Fracture Networks

SPE Journal ◽  
2020 ◽  
Vol 25 (06) ◽  
pp. 2898-2914
Author(s):  
Miao Zhang ◽  
Luis F. Ayala
Keyword(s):  
Boundary Element Method ◽  
Boundary Element ◽  
Nonlinear Partial Differential Equations ◽  
Boundary Integral ◽  
Element Formulation ◽  
Gas Reservoirs ◽  
Gas Recovery ◽  
Infinite Conductivity ◽  
Fractured Horizontal Wells ◽  
Element Method

Summary In this paper, we present a novel application of the dual-reciprocity boundary-element formulation (DRBEM) to model compressible (gas) fluid flow in tight and shale-gas reservoirs containing arbitrary distributed finite- or infinite-conductivity discrete fractures. Compared with the standard boundary-element method (BEM), the DRBEM transforms the nonlinear domain integrals at the righthand side (RHS) of BEM formulations for nonlinear partial differential equations into equivalent boundary integrals. This transformation allows retention of the domain-integral-free, boundary-integral-only character of standard BEM approaches. The proposed approach is based on coupling DRBEM with the finite-volume method (FVM) in which a multidimensional system is solved by integrating over a line with random fractures. The resulting system of equations is solved simultaneously for fracture and matrix boundary conditions by combining DRBEM and FVM without invoking any approximation for pressure-dependent nonlinear terms such as gas viscosity and compressibility. Numerical examples and field cases are presented to test the validity and showcase the capabilities of the proposed approach. The proposed model provides a general framework that can be applied to a variety of well and fracture geometries and operating schedules, and it is used to analyze production behavior for these complex systems. To the best of the authors’ knowledge, this is the first successful application of the dual-reciprocity principle to the BEM analysis of massively fractured horizontal wells (MFHWs) performance in natural-gas formations in which nonlinear, pressure-dependent gas properties are captured without approximation.

Gas recovery potential of sandstones from tight gas reservoirs

2014 ◽  
Vol 65 ◽  
pp. 75-85 ◽  
Author(s):  
Z. Duan ◽  
C.A. Davy ◽  
F. Agostini ◽  
L. Jeannin ◽  
D. Troadec ◽  
...  
Keyword(s):  
Tight Gas ◽  
Gas Reservoirs ◽  
Tight Gas Reservoirs ◽  
Gas Recovery ◽  
Recovery Potential
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