Thursday, 28 January 2016

What is a neutron probe and what do we use them for?

A neutron probe provides calibrated borehole-compensated neutron porosity measurements designed for mud filled holes. The neutron probe is the probe of choice when it comes to quantitative formation fluid studies. Under the majority of borehole conditions, a single-detector neutron probe is also available for qualitative porosity logging.  This includes through steel or plastic casing and drill pipes.

Probes such as neutron probe are used to identify faults and folding, along with locating issues and characteristics within certain fractures that allow the proceeding to complete further investigation. These imaging probes allow each electrode to emit its own current that is focussed into a narrow beam and returned to a remote part of the tool body. This current is the digitalised in each pad, before being transmitted to the surface by a separate telemetry module. This makes use of propriety high speed communication systems and may be run through 4 or 7 core cables, making it compatible with standard oilfield systems, running Warrior software.

 Micro-resistivity, borehole diameter, drift and inclination are among some of the measurements that can be registered during the operation of this new tool. There are a number of different probes on the market, suited to different activities. The neutron probe will operate in a water filled open or cased borehole, whereas the slim micro-resistivity image probe works in water based mud.

These probes have been developed thanks to the growth within the industry, allowing technological advancement to influence the introduction and use of probes.  Wireline logging is also experiencing growth and development and expects to have made rapid increases by 2020. The increase in exploration, production activities and expenditure by oil and gas companies has allowed the industry to grow.

Image by 'magnera' / Licence

Tuesday, 19 January 2016

Welsh construction industry is the backbone of economy

The Chief Executive of Construction Excellence in Wales has said that construction is the backbone of the Welsh economy and is detrimental to the well-being of transport infrastructure that is used every day, as well as supporting welsh schools, hospitals and office buildings.

The public sector is currently the biggest client for the Welsh Construction supply chain, of which Construction excellence Wales helps to deliver the quality buildings and facilities that is needed. 

Through education, campaigning and encouraging everyone involved with Welsh construction to deliver buildings and facilities we all want, quality construction will be able to deliver. The Chief Executive said “Quality construction cannot be delivered in isolation by pursuing the lowest cost or exclusively though client and supplier relationship”.

The organisation is working together to encourage more focus on collaborative procurement models that allow experts to guide projects to finish on time, in budget and hit the outlined targets of waste, low carbon and the local community.

Welsh construction on the whole in this respect is improving, generating jobs and allowing organisations to make investments needed in skills, materials and capital equipment.  The Wales based construction groundwork contractors are co-operating to ensure that high standards and the source of local labour and material is used where possible, energising the local workers.

Wales has enjoyed recent large scale construction projects, many of which that have been undertaken by Welsh firms. The likes of the North Wales prison, which is a £212 million project that is being built on a former factory site in Wrexham – on an industrial estate that sees North Wales based company Jennings groundwork contractors heavily involved with the work.

The North Wales prison will be providing approximately 2,100 Category C places for male offenders from North Wales and North West England, with estimation opening date being in February 2017. The sheer size of this project means that it’s expected to be able to fit seven Millennium stadiums inside of it – a total of over 120 acres.

This construction project has created many jobs, through construction requirements and an initial 80 people being taken on to work at the prison. The coming years should see this number increase, going to show just how important a strong welsh construction industry really is, as well as the role of ground contractors.

Monday, 11 January 2016

Understanding Seismic Inversion Technology

Seismic Inversion software
In the world of geophysics Seismic Inversion gathers information on the geology of an oil or gas field. Seismic Inversion transforms seismic reflection data into a quantitative rock-property description of a reservoir.

Seismic Reflection is a method of exploration geophysics used by petroleum geologists to estimate properties in the Earth’s subsurface from reflected seismic waves. 

A Seismic Inversion survey of a gas or oil field will have recorded sound waves which have travelled through layers of rock and fluid which exist under our earth. Once the frequency and amplitude of the waves has been estimated seismic inversion offers a more accurate and detailed view of the subsurface and more reliable data than interpretation without inversion.

Although there are different techniques that can be used in seismic inversion these can be understood in categories of pre-stack or post-stack and seismic resolution or well-log resolution. The technique utilised will be dependent upon your objective.

Equipoise Software are specialists in seismic inversion software for the oil and gas industry and they have developed a sophisticated Seismic Inversion plug-in for use with Petrel and Kingdom Software. It is called Inseis and branded as Kingdom Seismic Inversion software when used in the HIS Kingdom software. This software utilises the coloured inversion and simulated annealing inversion techniques. These are regarded as very high quality methods for seismic inversion because they are fast while remaining highly reliable for determining relative impedance and absolute acoustic impedance from seismic data.

Both methods used in this software, coloured inversion and simulated annealing inversion, will attempt to turn seismic signals into an acoustic impedance layer model.

The Software has many excellent features to make it easy to get the data you need such as -
•    Supporting single and multi-well analysis
•    Automatic seismic to well phase correction
•    Quality control at each stage of inversion operation
•    Sonic log to time-depth curve and check shot calibration
•    Highly customizable, user friendly interface
•    Simple data requirements
•    Fully integrated with Petrel/Kingdom

As well as being fast and reliable Inseis has many advantages over other software. Like all seismic inversion surveys it will enhance your seismic data making it much easier to interpret. Of course we all know seismic inversion is essential to increasing the accuracy of your data and Inseis will match seismic data to well log data. This will produce a clearer picture with less noise and less signal instability.

Another benefit is that neither wavelet nor low frequency macro-model is required when using Inseis. It is highly user friendly, simple, straight forward and all interpreters will find it simple to set up and use. The software is perfect as a ‘quick view’ inversion tool prior to more in-depth studies.
If you would like to find out more about Inseis contact Equipoise Software on 020 8256 1150 or email

Tuesday, 5 January 2016

Coastal Management Strategies - Rock Armour, Riprap, Sea Wall

Managing our coastlines is a very important subject, as the physical effects of the waves crashing up against the land can cause problems such as erosion and long shore drift. Thankfully, several management strategies were founded, allowing us the means to control these natural processes.

There are two main categories of coastline management strategies, ‘hard’ and ‘soft’ management. 

Hard engineers will normally cost more money, are quick to be put into action and are sometimes only used as a short term fix that may visually and physically affect the environment. The other option is ‘soft’ engineering techniques, which are comparatively cheaper and are normally executed with a more long term and sustainable view.

Rock armour is generally considered as a ‘hard’ method, and is sometimes used in rough areas where there is little alternative option than to protect the coastline long term through the placement of some sort of structure(s).

Rock Armour

Otherwise known as Riprap and Boulder Barriers, Rock armour consists of many large boulders piled up on top and next to each other, most commonly found on beach fronts and in areas of rough waves. These boulders are highly effective in the absorbing of the energy that comes from the waves. The main disadvantage associated with this method is the difficulty involved in transporting and placing masses of large, heavy boulders.

Sea Wall

A man made wall that has been built into the water, separating the sea from the land area is another method employed by construction workers and civil engineers, in aim to protect the coastline from the crashing water. These seal walls are especially effective in preventing coastal floods, as they leave no room for leakage. Although worthwhile, a seal wall is very difficult to build and will require maintenance as it will take some damage from waves and erosion over time.


These can be simply described as wooden barriers that are built at right angles in relation to the beach. They are relatively simply to erect, and prevent the movement of beach materials along the coast by long shore drift and promote the healthy build-up of a beach – of which are natural guardians of the coastline (and of course excellent tourist attractions). These are highly effective in its use, however can be displeasing on the eyes and will need maintenance over its lifetime.

Soft management techniques are cheaper and usually more sustainable, but my not enjoy immediate success. Soft options include beach management – the replacement of sand that has been takes and compacted over time, along with the creation of managed retreats. This allows water to flow freely around its crashing point, but will often require the redevelopment of land by the coastline.

Jennings building and civil engineer contractors are geared up to help prevent erosion and damages to our beloved coastlines. With capability that will allow them to transport boulders for rock armour, they are an excellent choice when it comes to your planning and construction needs.

Image from 'ernohannink' license