Data-Driven optimization of intermittent gas production in mature fields assisted by deep learning and a population-based global optimizer

In gas wells, decreased/unstable production can occur due to difficult-to-predict dynamic effects resulted from late-life phenomena, such as liquid loading and flooding. To minimize the negative impact of these effects, maximize production and extend the wells’ lifetime, wells are often operated in an intermittent production regime. The goal of...

Improving the accuracy of virtual flow metering and back-allocation through machine learning

In this study we have investigated a fully data-driven approach (artificial neural networks) for real-time back-allocation and virtual flow metering in oil and gas production wells. The main goal of this study is to develop computationally efficient data-driven models to determine the multiphase production rates of individual phases (gas and...

Future European shale gas life-cycle GHG emissions for electric power generation in comparison to other fossil fuels

The carbon footprint of shale gas combusted in Europe was estimated from nine European shale gas plays as potential production regions. Greenhouse gas emission sources during shale gas production, such as fugitives from hydraulic fracturing or combustion emissions from horizontal drilling, were added to emissions occurring for conventional gas...

Wave propagation modelling of induced earthquakes at the Groningen gas production site

Gas extraction from the Groningen natural gas field, situated in the Netherlands, frequently induces earthquakes in the reservoir that cause damage to buildings, and pose a safety hazard and a nuisance to the local population. Due to the dependence of the national heating infrastructure on Groningen gas, the short-term mitigation measures are...

The future of subsidence modelling: compaction and subsidence due to gas depletion of the Groningen gas field in the Netherlands

The Groningen gas field has shown considerable compaction and subsidence since starting production in the early 1960s. The behaviour is understood from the geomechanical response of the reservoir pressure depletion. By integrating surface movement measurements and modelling, the model parameters can be constrained and understanding of the...

Statistics of seismic event at Groningen field

Depletion of gas fields, even in a tectonically inactive area can induce earthquakes.

Subsidence due to gas production in the Wadden Sea: How to ensure no harm will be done to nature

The Wadden Sea is a shallow tidal sea in the north of the Netherlands where gas production is ongoing since 1986. Due to the sensitive nature of this area, gas extraction induced subsidence must remain within the "effective subsidence capacity" for the two tidal basins (Pinkegat and Zoutkamperlaag) affected. We present a probabilistic method to...

Addressing uncertainties in estimates of recoverable gas for underexplored Shale gas Basins

Uncertainties in upfront predictions of hydraulic fracturing and gas production of underexplored shale gas targets are important as often large potential resources are deduced based on limited available data. In this paper, uncertainties are quantified by using normal distributions of different input parameters in wellbased models for hydraulic...

Production of gas from coal seams in the Upper Silesian Coal Basin in Poland in the post-injection period of an ECBM pilot site

A pilot site for CO2 storage in coal seams was set-up in the Upper Silesian Coal Basin in Poland in the scope of the RECOPOL project, funded by the European Commission. About 760 tons CO2 were injected into the reservoir from August 2004 to June 2005. Breakthrough of the injected CO2 was established, which resulted in the production of about 10%...

Assessment of CO2 storage performance of the Enhanced Coalbed Methane pilot site in Kaniow

A pilot site for CO2 storage in coal seams was set-up in Poland, as has been reported on previous GHGT conferences. This site consisted of one injection and one production well. About 760 ton of CO2 has been injected into the reservoir from August 2004 to June 2005. Breakthrough of the injected CO2 was established, which resulted in the...

Prediction onset and dynamic behaviour of liquid loading gas wells

As reservoir pressures decrease in maturing gas wells, liquid drop-out forms an increasing restriction on gas production. Even though virtually all of the world's gas wells are either at risk of or suffering from liquid loading, the modeling of liquid loading behavior is still quite immature and the prediction of the minimum stable gas rate not...

Comparison of organic matter degradation in several feedstuffs in the rumen as determined with the nylon bag and gas production techniques

Organic matter (OM) degradation of 21 feedstuffs was investigated with rumen fluid using a rumen in situ technique and a gas production technique. Fitting the nylon bag data to an exponential model showed that there was a high variation in the rate of OM degradation ranging from 1.7% h-1 for protected solvent extracted soybean meal to 10.5% h-1...