G&G Services

Geological and Geophysical Services

Good integration of Geological and Geophysical data is a cornerstone of any exploration program. Coherent geological plays, well characterised prospects with accurate risk and volumes are requisite for any drill ready opportunity

Seismic Interpretation and Prospect Delineation

We bring seismic interpretation skills with a strong geological mindset, the aim to identify and characterise the exploration potential within a 2D or 3D seismic dataset. 

Placing the interpretation within a solid geological model and in regional context is critical to the evaluation and risking of identified leads and prospects and to allow new plays to be recognised to drive organic portfolio build. 

Map Graphic

Petroleum Systems Analysis

PSA work underpins charge assessment of both play and prospect risk. We have a deep understanding of the rocks, are skilled at integration of data from multiple disciplines, and can deliver clear and concise evaluations, built with great care.

We bring specialised experience in areas of PSA work that goes beyond standard analysis methods to help reveal the hidden potential of basins, highlighting future opportunities through a top-down approach that allow new play types to be identified in mature, emerging and frontier basins.  

Play Based Exploration (PBE)

Highly skilled at evaluating the key elements needed for hydrocarbon accumulation, we recommend a split risk approach that considers both play and prospect risk and allows assessment of current portfolio value as well as delivering robust estimates of Yet to Find.

Despite appearing deceptively simple, constructing the constituent parts of a successful PBE study relies on clear and consistent methodology and a recognition that attention to detail coupled with a solid understanding of the plethora of techniques relied on to produce the basic input data is essential.  


Trap and Seal Evaluation

The presence of a suitable trapping geometry, together with a deep understanding of the processes that can impair the integrity of traps over geological time are critical to effective risking of any prospect.

Seals can be a problematic component of any petroleum system, being challenging to evaluate due to limited sampling, a reliance on spot measurements that are rarely representative and a range of different issues that depend on the depositional system that produced them. Add in dynamic trap breach elements and many of the established techniques cease to be effective. Lack an effective seal and its game over so careful attention to these play elements is vital for future success.

Petroleum Systems Analysis

Good petroleum systems analysis relies on a deep understanding of the rocks, often finding and evaluating data acquired many years ago in conditions that would be considered poor in relation to current good oil-field practice.

Get the input data wrong and fancy software will not save you, leading to invalid predictions, poor decisions and ultimately too many dry holes.

Too often the crucial role of collating data is given to inexperienced younger staff with limited awareness of the many pitfalls that can befall the uninitiated. Set up to fail the blame lies not with those learning their craft but rather with a system that neglects to assign appropriate importance to the task.

Experience drawn from decades of cross-discipline exposure to the aspects of data acquisition, sampling techniques, laboratory work-up, application of diverse analytical techniques, quality control through to post-mortem well reviews and geological integration all converge to determine if the data that goes in the models is robust, reliable and that nothing has been taken for granted.

Careful evaluation of reservoir, seal, trap, source and secondary migration elements all require awareness of where problems typically arise and experience to spot the tell-tale signs where not everything has gone to plan during acquisition, storage and subsequent analysis, all before one even begins to consider any meaningful interpretation of the raw data.

Ascendience brings decades of experience to addressing petroleum systems data as part of evaluations, ranging from comprehensive regional studies to quick look assessments or detailed prospect risk evaluations. This includes the opportunity to mentor staff to help knowledge transfer and empower them to undertake high quality assessments.

Forewarned is forearmed. Profit from other peoples mistakes.

Seismic Interpretation and Prospect Mapping

We bring seismic interpretation skills with a strong geological mindset, the aim to identify and characterise the exploration potential within a 2D or 3D dataset. 

Interpreting geology rather than simply picking wiggles leads to identification of rich leads and prospects inventories that incorporate structural and stratigraphic trapping geometries across a variety of depositional and structural settings including salt involved basins. Considerable experience with regional 2D data and interpretation in areas of broad line-spacing or poor-quality vintage data, enables earlier recognition of the play potential to aid ranking of new venture opportunities and to lend support to decisions to reprocess or acquire new 2D or 3D data. Experienced with interpretation of offshore and onshore data, Australia, Morocco, Senegal, Nova Scotia, we also specialise in evaluating existing 3D seismic to reveal hidden play potential, particularly in areas where we hold long experience, the prolific Carnarvon, Browse and Bonaparte basins of Australia.

2D And 3D Seismic Interpretation
Regional Mapping
Lead And Prospect Identification
Trap Breach Assessment
Seismic Facies Mapping Within A
Sequence-Stratigraphic Framework
New Play Identification
Cap-Taffeiney Fold Belt